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November 23, 2014

Homework Help: Science: Earth

Recent Homework Questions About Earth

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Physics
Any help pleeeze!! I'm totally lost on these!! 1. A 14 g coin slides upward on a surface that is inclined at an angle of 16° above the horizontal. The coefficient of kinetic friction between the coin and the surface is 0.23; the coefficient of static friction is 0.31. ...
Sunday, May 20, 2007 at 11:03am

science
write an account that considers what conditions would be required on an earth-like extrasolar planet for the carbon based life to evolve. In your answer you must keep in mind what is thought to have happened on earth, and you must: according to this i have to write about how ...
Saturday, May 19, 2007 at 2:11pm

science
Discuss how comets might have a role to play in life evolving on an earth-like extrasolar planet in a distant solar system. can some one please help me out here. If life came to Earth via a comet, wouldn't it make sense to predict that some comet could carry life to some ...
Friday, May 18, 2007 at 9:02pm

science
cyanobacteria,wich first appeared on earth over 3 billion yaers ago are? a.austrolopithecines b.prokaryotes c.one of the organisms on land d.descendents of primitive plants http://en.wikipedia.org/wiki/Cyanobacter​ia Read 1st Paragraph
Friday, May 18, 2007 at 4:52pm

environmental science
What are some possible effects of climate change resulting from a warmer earth? Possible effects is melting of the polar caps, and flooding on all continents. Also, weather and rainfall patterns will change, so plants and animal will have a hard time finding food. Basically, ...
Thursday, May 17, 2007 at 7:21pm

Architecture Question
It looks as if what you need to do is learn how to conduct thorough and effective searches for yourself. That's what research is, and I'm sure that's what your teacher expects you to do -- conduct research. You are searching for information that is so specific that...
Tuesday, May 15, 2007 at 11:17pm

Macroeconomics
Has anyone ever done a project on Macroeconomics in the Middle Earth? (based on Lord of the Rings?) I need help NOW! What a wonderful idea!! I presume you have read LOTR. You could do the whole middle earth or just a just an area such as the Shire or Gondor. Topics to include ...
Tuesday, May 15, 2007 at 9:23pm

english
what does FLOURISH mean in the context of shakespeare. ie. [flourish and shout] flourish v. flour.ished,flour.ish.ing,flour.ish.es v.intr. To grow well or luxuriantly; thrive: The crops flourished in the rich bottomland. To do or fare well; prosper: ¡°No village on ...
Thursday, May 10, 2007 at 7:53pm

Science Question
Our class is studying the concave earth theory, which are our teacher suggests is the most viable theory for understanding the composition of the earth and the universe as a whole. However, I am having a difficult time comprehending the concave earth theory and how it would ...
Thursday, May 10, 2007 at 6:49pm

science
The true speed of a moving car on the Earth, if you want to be very precise, would be the speed of the car with respect to the ground Is this true? yeah it is true yeah it is true The true speed of a moving car on the Earth, if you want to be very precise, would be the speed ...
Thursday, May 10, 2007 at 11:27am

Geography.
Explain how each of thse affect climate. -latitude -ocean currents -winds and air masses -elevation(altitude) -relief(mountain barriers) -nearness to water Please help. I need straight forward answers. I read some info online about these...but I do not understand. So can you ...
Wednesday, May 9, 2007 at 10:34pm

Science
Can someone tell name 6 effects of ocean currents? Thanks Since this is not my area of expertise, I searched Google under the key words "'ocean currents' effects" to get these possible sources: http://www.thecanadianencyclopedia.com/i​ndex.cfm?PgNm=TCE&...
Wednesday, May 9, 2007 at 7:02pm

science
Couple of questions. Why does the earth keep moving? The engine of a rocket applies a continual force to push the rocket along. When the engine stops what will happen? I think the rocket will stop acceleration You need to be aware of the concept of inertia. Inertia is the ...
Tuesday, May 8, 2007 at 3:03pm

science
1.) Any object having a very large mass would necessarily have a very large weight. true or false? False 2.)For a freely falling object, A) the total distance covered doesn't change. B) the velocity doesn't change. C) the acceleration doesn't change. D) the speed ...
Tuesday, May 8, 2007 at 2:10pm

physics
Can someone check these? 1. What device, developed in 1970, is able to make images of individual atoms? 1. The X-ray crystallographer 2. The laser 3. The Brownian motion detector 4. The scanning electron microscope My answer: 4 2. Which of the following is smallest? 1. Proton ...
Tuesday, May 8, 2007 at 1:44pm

Would you take this survey, please?
This is an assignment I have for a sociology class, to have people fill out surveys. Lot's of fun. Thanks! 1. What is the most important thing in your life? 2. How do you determine right and wrong? 3. Are you a good/bad person? How do you know? 4. What is your goal in life...
Monday, May 7, 2007 at 12:56am

physics-heat transfer
consider a brick wall that has been exposed to the sun for some time. 1.how did the heat get from the sun's surface to the wall?(is it something about radiation?please help.) 2.the air over the wall seems to shimmer and shake as air currents rise from it.explain what ...
Friday, May 4, 2007 at 7:19am

English
umm don't know if i'm able to ask this but i was wondering if you guys would do a small interview for me for a research. the question is: why do you think many of us are obsessed with gardens and gardening(ur opinion plz)? can u please leave ur name(you can make it up ...
Thursday, May 3, 2007 at 11:00pm

Physics (pressure)
What is the total mass of the earth's atmosphere? The radius of the Earth is 6.37E6 m, and atmospheric pressure at the surface is 1.013E5 N/m^2 (or Pa). I tried this: 1.013E5 Pa = Mg/ pi(6.37E6)^2 1.013E5 Pa (denominator)= 9.8 M solve for M: I'm coming with different ...
Thursday, May 3, 2007 at 8:05am

chem
Which shows the greatest metallic character? -Na -K -Rb -Cs Also, What ions are very important for the proper functioning of biologic systems such as nerves and muscles? --oxygen ions --nitride ions --alkali metal ions --alkaline earth metal ions --hydrogen ions
Wednesday, May 2, 2007 at 4:55pm

Physics
I really need you answered this to my email. It's very important, for this may decide my result in the school exams, and I really need a good mark. Unfortunately, Portuguese system of education is full of problems... The question is... The altitude of a geostationary ...
Monday, April 30, 2007 at 6:12am

Calculus Or Something
Find the true location of the sun in relation to your reference of the horizon if the sun is observed to make an angle of theta with the horizon. This is not an easy question. Use Snell’s law to take into account the aberration and bending of light rays as they pass ...
Monday, April 30, 2007 at 12:36am

English
I am doing a reading comprehension project and I need to find a book and a song about "the elderly". Please Help!! do you mean like about old people or a book called The Elderly? about old people. about old people. hang on I'll look google Books About the Elderly...
Sunday, April 29, 2007 at 5:20pm

astronomy
A line in star's spectrum lies at 400.0 nanometers. In the laboratory, that same line lies at 400.2 nanometers. How fast is the star moving along the line of sight; that is, what is its radial velocity? Is it moving toward or away from us? Since the wavelength shift is to ...
Friday, April 27, 2007 at 12:44pm

My Research Has Failed....
have made a grave mistake. My study of the “darkness of the heart” began with a simple psychological test and quickly snowballed. Spurred on by my youngest apprentice Ienzo, I constructed a massive laboratory in the basement of my castle. Unbeknownst to me, my six ...
Wednesday, April 25, 2007 at 6:40pm

Earth science
I would like to comfirm that the 4 cycles on Earth are: carbon, water and rock. I think the 4th one is the biosphere but am not sure as the biosphere contains all attributes necessary (including the atmosphere)for life to exist. Am I on the track? I do understand that the ...
Wednesday, April 25, 2007 at 12:59pm

Science - geology
The age of a granite can be determined using radiometric dating. Explain the basis for a determination of a 238U-Pb radiometric date of 1120Ma for a granite.......HELP!!! hi sounds like you are on the same course as me i was stuck on this so give this a go as this is what ...
Wednesday, April 25, 2007 at 4:05am

science
water from the earths surface moves in the air by ? and becomes ?. evaporation, and becomes water vapour in the earth's atmosphere
Tuesday, April 24, 2007 at 8:51pm

chem help ASAP!!!!
What ions are very important for the proper fuctioning of biological systems such as nerves and cells? A)alkali earth metals B)hydrogen ions C)oxygen ions D)nitride ions E)alkali metal ions my choice is A or C can anyone help?
Sunday, April 22, 2007 at 7:52am

chemsitry
What ions are very important for the proper fuctioning of biological systems such as nerves and cells? A)alkali earth metals B)hydrogen ions C)oxygen ions D)nitride ions E)alkali metal ions
Saturday, April 21, 2007 at 11:32pm

geography
discuss how interactions between the Earth systems affect the climate Mary or Bob or whoever, Please note that we don't do students' homework for them. Our tutors try to give you the information to help you complete your assignment on your own. If there's not a ...
Saturday, April 21, 2007 at 12:55pm

Chemistry
Choose the group from the given list: a) 1A b) 2A c) 3A d) 4A e) 5A The elements in this group are termed alkali metals. a b c d e nvm....choose the wrong question to post the question I wanted to post is: Choose the group from the given list: a) 1A b) 2A c) 3A d) 4A e) 5A ...
Friday, April 20, 2007 at 8:15pm

Environmental Science
Earth's surface water is found in a.lakes b.rivers c.streams d.all of the above I picked d. because that's where SURFACE water is at right? yup ditto.....
Friday, April 20, 2007 at 5:50pm

Primates
Where can I find information regarding when different types of primates showed up in earth's history? http://www.google.com/search?as_q=primat​e+evolution&hl=en&num=10&btnG=Google+Sea​rch&as_epq=&as_oq=&as_eq=&lr=&as_ft=i&as​_filetype=&as_qdr=all&as_nlo=&...
Friday, April 20, 2007 at 1:28pm

physical science
The answer to this can be found more quickly by consulting either an online or hardcopy dictionary. Here is an online dictionary definition. Main Entry: ge·ol·o·gy Pronunciation: jE-'ä-l&-jE Function: noun Inflected Form(s): plural -gies Etymology: New ...
Thursday, April 19, 2007 at 6:05pm

IS THIS TRUE
Biggest Land mammal: African elephants weigh up to 14,000 pounds and can eat as much as 600 pounds of food a day! Marine mammal: The blue whale is the world's biggest animal, even larger than any known dinosaur. An average-sized adult is 80 feet long and weighs about 120 ...
Thursday, April 19, 2007 at 5:19pm

science
What can scientist learn from moon rocks? A. The moon's water supply evaporated in recent years B. The moon is denser than earth C. The moon is older than the Earth D. The moon and earth are made of similar material let me see A and C are wrong cause a say the moons watre ...
Wednesday, April 18, 2007 at 6:09pm

science science science science science science
The moon orbits around the earth.Which of the following keeps the moon traveling in the same path each time it orbits the earth? A.energ from the surroundings B.Pull of gravity between the moon and the earth C.orbits in space are pushing the moon towards the earth D.the winds ...
Wednesday, April 18, 2007 at 5:31pm

5th Grade Science
The force of attraction between the Earth and an object is called? A. Magnetism B. Mass C. Energy D. Gravity http://en.wikipedia.org/wiki/Gravity hey ken. someone told me it was gravity So you think it is gravity
Wednesday, April 18, 2007 at 5:14pm

Science (planets/gravity)
What keeps all the planets the big ones and the small ones in orbit in our big solar system? A.The gravity from the sun. B.The gravity from the moon. C.The gravity between all the planets. D.The gravity from the beautiful our earth. What do all the planets orbit around? the ...
Wednesday, April 18, 2007 at 4:50pm

helpppppppppppppp
You have it! In the future, please do not post more than once, and please post without the theatrics in the subject line. It won't get you help any faster. Can some one explain this passage I do not understand it it is by hazlitt it is called "on the want of money&...
Tuesday, April 17, 2007 at 11:05pm

Science
On the spring equinox, in what part of the sky and what time of day does the full moon rise? March 20th is the Spring Equinox for the northern hemisphere, the time of year when the sun is at zero degrees longitude and latitude on the ecliptic, and the hours of daylight and ...
Tuesday, April 17, 2007 at 8:22pm

Social Studies
What a good topic from prehistory through the Enlightenment ages. Something interesting please. Topic for what: a few paragraphs, a short paper, or a long term paper? I always liked the history of witchcraft, the discovery of the solar system in which Earth was not the center...
Monday, April 16, 2007 at 7:50pm

Physics 12
What is the gtravitational potential energy of a 2.00e3 kg staellite that is in an orbit that has a radius of 9.90e6 m around the earth? Use gravitational potential energy=0 at r=‡ (answer=-2.01e11J) What is the work done against gravity on the satellite in the ...
Monday, April 16, 2007 at 12:47pm

French
Is this paragraph correct? Would someone mind editing it for me? La derniere semaine, une partengue a piqué Steve Irwin quand il a nagé à la nord de l'Australie. Steve Irwin est mort de la poison. Il n'y a pas d'un accident. La partengue a &...
Sunday, April 15, 2007 at 2:42pm

earth science
how can the interactions between the earth systems affect the climate?? any one help me i dont knw where to start and i need to write 700 words on it Step one is to read your S103 course materials rather than try to get someone else to answer it for you.
Saturday, April 14, 2007 at 7:14pm

Chemistry
Use these answers for questions 4 - 7. (A) 1s2 2s22p5 3s23p5 (B) 1s2 2s22p6 3s23p6 (C) 1s2 2s22p62d10 3s23p6 (D) 1s2 2s22p6 3s23p63d5 (E) 1s2 2s22p6 3s23p63d3 4s2 4. An impossible electronic configuration 5. The ground-state configuration for the atoms of a transition element ...
Thursday, April 12, 2007 at 11:00pm

Electric forces
An electron is released above the earth's surface. A second electron directly below it exers just enough of an electric force on the first electron to cancel the gravitational force on it. Find the distance between the two electrons. I thought if I just set the ...
Wednesday, April 11, 2007 at 7:46pm

calcq
2- The earth’s atmospheric pressure p is often modeled by assuming that the rate dp/dh at Which p changes with the altitude h above sea level is proportional to p. Suppose that the pressure at sea level is 1013 millibars (about 14.7 pounds per square inch) and that the ...
Wednesday, April 11, 2007 at 7:18pm

calc
2- The earth’s atmospheric pressure p is often modeled by assuming that the rate dpdhat Which p changes with the altitude above sea level is proportional to hp. Suppose that the pressure at sea level is 1013 millibars (about 14.7 pounds per square inch) and that the ...
Tuesday, April 10, 2007 at 11:52pm

earth's systems
What are the four earth systems? and how do they interact with eachother? Lithosphere, Biosphere, Atmosphere, and Hydrosphere. They operate in an integrated fashion. I recommend you cite some specific interactions. all of the systems work together by air masses
Tuesday, April 10, 2007 at 6:07pm

Astronomy
Calculate the ratio of the escape velocities from the moon and Earth. Calculate the ratio of the escape velocities from the moon and Earth In order to escape the gravitaional pull exerted by a central body on an orbiting object, it must must achieve a minimum inertial velocity...
Tuesday, April 10, 2007 at 3:57pm

Astronomy
A cinder block can be weightless in space. Would you want to kick it with your bare foot? Even If it is weightless, does it have mass? An astronaut, circling the earth in the Space Shuttle, senses that his apparent weight is zero. He cannot feel the normal earthbound sensation...
Tuesday, April 10, 2007 at 3:56pm

Physics please check
As you climb a mountain, your ears "pop" because of the changes in (a) In which direction does your eardrum move as you climb up? inward outward eardrum does not move Give your reasoning. I think the eardrum moves outward because the further you go away from the ...
Monday, April 9, 2007 at 12:43am

physics
An asteroid, whose mass is 2.0 10-4 times the mass of Earth, revolves in a circular orbit around the Sun at a distance that is 2.9 times Earth's distance from the Sun. (a) Calculate the period of revolution of the asteroid in years. (b) What is the ratio of the kinetic ...
Sunday, April 8, 2007 at 1:13pm

physics
An asteroid, whose mass is 2.0 10-4 times the mass of Earth, revolves in a circular orbit around the Sun at a distance that is 2.9 times Earth's distance from the Sun. (a) Calculate the period of revolution of the asteroid in years. (b) What is the ratio of the kinetic ...
Sunday, April 8, 2007 at 12:48pm

earh science
earths early atmosphere formed during the archean era. Which gas was generally absent from the atmosphere at this time http://en.wikipedia.org/wiki/Earth's​_atmosphere#Evolution_of_the_Earth.27s_a​tmosphere
Friday, April 6, 2007 at 12:52pm

Religion-Islam-Al-Quran
There seems to be no one here who is familiar enough with the Quran to answer you at this time. You are certainly free to use any search engine, but be aware that you will find conflicting and confusing results, as with most online searches. http://www.google.com/search?q=...
Thursday, April 5, 2007 at 6:01am

earth science
what is the most common sedimentary rock? Since this is not my area of expertise, I searched Google under the key words "sedimentary rock common" to get these possible sources: http://www.cartage.org.lb/en/themes/Scie​nces/Earthscience/Geology/RocksandMinera&#...
Wednesday, April 4, 2007 at 2:34pm

earth science
what class of minerals contains the element oxygen bonded to a metallic element http://en.wikipedia.org/wiki/Iron_oxide
Wednesday, April 4, 2007 at 2:24pm

earth science
24. emormous masses of ____ rock all over the world, such as the Columbia Plateau in the northwestern U.S., give evidence of some huge catastrophic action. granite mountainous sedimentary volcanic volcanic right? Yup.... absolutely
Wednesday, April 4, 2007 at 12:49pm

earth science
22. an illustration of the fact that a sudden and great _____ struck the earth is the millions fo mammoths and other large animals frozen instantly and preserved, whole and undamaged. catastrophe cold front ice age permafrost ice age right This also makes good sense.
Wednesday, April 4, 2007 at 12:41pm

earth science
21. Billions of fossils of plants, fishes, and land animals, many almost perfectly preserved, could not have been buried by natural _______ observable in the world today. DEATHS DISEASES EVELOUTION PROCESSES processes right? That makes good sense to me.
Wednesday, April 4, 2007 at 12:23pm

Earth
1. The great galaxy in Andromeda has an angular diameter along its long axis of about 5^0. Its distance is about 2.2 million light years. What is its linear diameter? angle*distance= arc distance. You need the angle in radians to do this.
Tuesday, April 3, 2007 at 9:37pm

Geography.../what does this mean?
" The earth's physical landscape is the result of conflict between forces..." Explain what this means. Thanks. Is it possible that forces move Earth around, sometimes the movement is opposing another landforce, they collide, and one slide under?
Tuesday, April 3, 2007 at 8:54pm

Physics HELP!!!!!!!!
The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. Assuming the earth is a sphere with a radius of 6.38 106 m, determine the speed and centripetal acceleration of a person situated ...
Tuesday, April 3, 2007 at 6:33pm

Earth
1. If the Earth were the size of B-B (with a radius of about 0.2 centimete), how big would the Sun be? How big would the Milky Way be? 2. Imagine building a model of the Solar System on your campus. Work out the diameter and spacings of the planets in millimeters and meters ...
Tuesday, April 3, 2007 at 5:52pm

astronomy
1. The radius of the Sun is 7 X 10^5 kilometers. Use powers of ten to show that the Sun's radius is about 100 times the Earth's radius. 2. Given that an astronomical unit is 1.5 X 10^8 kilometers and a light-year is about 10^13 kilometers, how many AU are in a light-...
Tuesday, April 3, 2007 at 5:50pm

chem
Forty miles above the earth's surface the temperature is 250 K and the pressure is only 0.20 mm Hg. What is the density of air (in grams per liter) at this altitude? (Assume the molar mass of air is 28.96 g/mol.) PV=nRT n/V= molar desity= P/RT mass density= molar density*...
Friday, March 30, 2007 at 1:27am

Physical Science
From a general relativistic point of view, a person on the ground floor of a skyscraper ages...faster or slower than a person on the top floor? With the faster movement of the rotation of the earth at the higher altitude, the person on the ground floor would age faster than ...
Thursday, March 29, 2007 at 10:14pm

Physics- drwls please help
(a) Calculate the kinetic energy that the earth has because of its rotation about its own axis. Assume that the earth is a uniform sphere and that its path around the sun is circular. For comparison, the total energy used in the United States in one year is about 9.33 109 J. (...
Wednesday, March 28, 2007 at 6:52pm

science
What star other than the sun is closest to the earth? Proxima Centauri, which is part of the alpha Centauri three-star system
Wednesday, March 28, 2007 at 5:17pm

Physics
Calculate the kinetic energy that the earth has because of its rotation about its own axis. Assume that the earth is a uniform sphere and that its path around the sun is circular. For comparison, the total energy used in the United States in one year is about 9.33 109 J. ...
Wednesday, March 28, 2007 at 12:40pm

Physics
A ball is tossed straight up from the surface of a small spherical asteroid with no atmosphere. The ball goes to a height ewual to the asteroid's radius and then falls straight down towardd the surface of the asteroid. What forces if any act on the ball while it is on the ...
Monday, March 26, 2007 at 6:41pm

science
where can you see earth's atmospere clearly Well, you can see light that is scattered from microscopic dust particles in the atmosphere during the day from any point: That blue color of the sky is that scattered light.
Monday, March 26, 2007 at 4:01pm

Science
Why is an extra day added to February every four years? It is nice to have the calendar year the same as the Earth's orbit around the Sun. It takes 365 1/4 days to go around the sun...so, each four years, we add a day to correct the calendar. Thanks Bob!
Sunday, March 25, 2007 at 11:11am

PLEASE HELP SOLVE RIDDLE
I jump I run, I am one of four, you can find me hanging around your door. What am I? Please help I'm usually great at answering these. But I am lost on this one. PLEASE tell us if you get the answer :) what weighs a lot going forward but not backwards? Two men occupy ...
Friday, March 23, 2007 at 7:44am

Geog
2- at sea level the air temperature is 80 degree F. this air reaches the dewpoint at 6,000’. The air continues to rise, pushed up by trade winds, over a mountain that is 12,000’ high. If the dry adiabatic rate is 5.5 degree F/ 1000’ and the wet adiabatic rate is...
Thursday, March 22, 2007 at 10:23pm

Science
I would like to know does this statement makes a good hypothesis for my paper(or)can someone give me some type of insight on how to word it correctly. "My paper will prove that homosexuality is a phenomenon that maybe due to biological factors, enviromental infulences or ...
Thursday, March 22, 2007 at 4:28pm

Re: Physics - drwls #2
Posted by winterWX on Monday, March 19, 2007 at 11:54pm. A small block of mass m = 4.0 kg can slide along the frictionless loop-the-loop. The block is released from rest at point P, at height h = 23R above the bottom of the loop (R is the radius of the loop). Express your ...
Thursday, March 22, 2007 at 3:01am

physics
A pendulum clock that works perfectly on Earth is taken to the Moon. (a)Does it run fast or slow there? (b) if the clock is started at 12:00:00 am, what will it read after one Earth day(24hrs)? Assume that the free-fall acceleration on the Moon is 1.63 m/s^2 I tried to do this...
Wednesday, March 21, 2007 at 4:33pm

English
Last one for today! (Thanks for all the help guys) Do these sentences mean the same? "Wheeling to their stations in the sky, the stars make the poor world-fret of no account." And "Wheeling to their stations in the sky, the stars make the world forget about its ...
Wednesday, March 21, 2007 at 9:46am

English
Hi. I need help understanding the following sentence. "And yet--and yet--is it not perhaps to satisfy expectation that one falls into the tragic key in writing of desertness? The more you wish of it the more you get, and in the mean time lose much of pleasantness." ...
Wednesday, March 21, 2007 at 8:39am

English
Hi. I need help understanding the following sentence. "And yet--and yet--is it not perhaps to satisfy expectation that one falls into the tragic key in writing of desertness? The more you wish of it the more you get, and in the mean time lose much of pleasantness." ...
Wednesday, March 21, 2007 at 7:26am

science NEED BY TOMMOROW MORNING AT 9:30!!
Can you tell me who figured out the earth was round and why they wanted to? THNX :) Please check this site for your information. http://www.madsci.org/posts/archives/nov​99/942957483.Sh.r.html People have always been curious and wanted to know about their environment.
Tuesday, March 20, 2007 at 6:28pm

Physics - drwls?
A small block of mass m = 4.0 kg can slide along the frictionless loop-the-loop. The block is released from rest at point P, at height h = 23R above the bottom of the loop (R is the radius of the loop). Express your answers in the form ngR, where n is the number you will ...
Monday, March 19, 2007 at 11:54pm

science
I am studying science at GCSE. I a working through a revision book and have come across a question which i am unsure of the answer. The question is, "state the number of different elements present in C6H5CO2Na." The answer i have is 14 but still i am unsure. Please ...
Monday, March 19, 2007 at 4:07pm

Science
Granite is an intrusive, felsic rock, which may be produced by partial melting or fractional crystallization. Explain how these processes can produce felsix magmas from more mafic parent magmas. Since this is not my area of expertise, I searched Google under the key words &...
Monday, March 19, 2007 at 9:48am

BIO ?'s
Why is life based upon the cell? More or less, why are cells necessary for life? Is there a limit to how large a cell can be? ** If anyone can help or just give me an idea to go on for this it would be helpful! Even a good site to start research! THANKS! There may be life ...
Sunday, March 18, 2007 at 9:04pm

Science
Why is the human population of the Earth still growing rapidly even though birth rates have begun to fall slightly? Due to better health and medical advancements, people are living longer.
Sunday, March 18, 2007 at 8:29pm

Science
[I picked d.] How many species are estimated to be living on earth? a.between 10,000 and 1,000,000 b.between 500,000 and 1 million c.between 1 and 5 million d.between 10 and 50 million http://faculty.plattsburgh.edu/thomas.wo​losz/howmanysp.htm This is a political, not ...
Sunday, March 18, 2007 at 3:21pm

science
As an environmental science teacher, how would you respond to someone who tells you (a) that he or she does not believe in biological evolution because it is "just a theory"? How would you respond if another student states, (b) we should not worry about air pollution...
Thursday, March 15, 2007 at 10:03pm

science
I need to know about the wind patterns, tides/high and low,or upwelling for the north sea,irish sea,and the bay of biscay Thank you for using the Jiskha Homework Help Forum. Here is what I find: 1. http://gpc.edu/~pgore/Earth&Space/GPS/wa​ves-currents-tides.html 2. http...
Wednesday, March 14, 2007 at 10:05am

Physics
A pulsar is a rapidly rotating neutron star that continuously emits a beam of radio waves in a searchlight manner. Each time the pulsar makes one revolution, the rotating beam sweeps across the earth, and the earth receives a pulse of radio waves. For one particular pulsar, ...
Wednesday, March 14, 2007 at 1:37am

earth science
Info on the largest earthquakes http://earthquake.usgs.gov/regional/worl​d/historical.php
Tuesday, March 13, 2007 at 10:36pm

Earth Science
Please help me out with this question!: Explain how hurricanes form. http://en.wikipedia.org/wiki/Hurricane
Tuesday, March 13, 2007 at 10:08pm

science
how is the air we breath today different from 3.6 billion years ago? http://en.wikipedia.org/wiki/Earth's​_atmosphere#Evolution_of_the_Earth.27s_a​tmosphere http://eesc.columbia.edu/courses/ees/cli​mate/lectures/earth.html
Tuesday, March 13, 2007 at 10:07pm

Physics
A pulsar is a rapidly rotating neutron star that continuously emits a beam of radio waves in a searchlight manner. Each time the pulsar makes one revolution, the rotating beam sweeps across the earth, and the earth receives a pulse of radio waves. For one particular pulsar, ...
Tuesday, March 13, 2007 at 2:40pm

science
The atmosphere is composed of a mixture of _______________, _____________ ____________, and tiny___________________. Thank you for using the Jiskha Homework Help Forum. The origin of our atmosphere is still open to a great deal of speculation. One theory is that the first ...
Monday, March 12, 2007 at 10:38pm

science
why do we find the major land biomes at specific locations on the earth in both the northern and the southern hemispheres? Variations in climate determine the biomes. These variations are determined by the frequency and direction of winds and ocean currents, along with ...
Monday, March 12, 2007 at 7:57pm

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