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August 30, 2014

Homework Help: Science: Earth

Recent Homework Questions About Earth

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earth
#40 which type of rock is a result of a rock changing by heat and pressure? a. metamorphic rock b. igneous rock c. sedimentary rock d. metal ores
Sunday, January 13, 2013 at 3:49pm

earth
#37 whenever scientist carefully measure any quantity many times they expect that: a. all the measurements will be exactly the same b. only two of the measurements will be exactly the same c. all but one of the measurements will be exactly the same d. the measurements will be ...
Sunday, January 13, 2013 at 3:47pm

earth
#25 seismic waves are similar to sound waves because_______ a/ both are produced by vibrations b/ both are caused by humans c/ they are both produced by radiation d/ seismic waves and sound waves are not similar in any way
Sunday, January 13, 2013 at 3:45pm

earth
#16 the inner core of the earth is solid because of increased__________ a> density and composition b> density and temperature c> temperature and pressure d> pressure and density
Sunday, January 13, 2013 at 3:42pm

earth
#15 The primary cause of crustal movement is_________ a.) conduction b.) convection c.) magnetism d.) radiation please help have no idea
Sunday, January 13, 2013 at 3:41pm

earth
#11 The state fossil of Nevada is the "Ichthyosaur", a dinosaur that lived in salt water. Why are so many of these fossils found in Nevada? a)lake mead once covered most of Nevada b)Nevada was once covered by oceans c)Ichthyosaur left the water to die d)ichthyosaurs ...
Sunday, January 13, 2013 at 3:40pm

earth
#10 which of the following is an effect of divergent plate movement? a.) glacial activity b.) mountain building d.) canyon erosion e.) sea floor spreading
Sunday, January 13, 2013 at 3:40pm

earth
#39 magma is a result of what process? a. cementation b. crystallization c. melting d. metamorphism
Sunday, January 13, 2013 at 3:29pm

earth science
#33 When conducting an experiment that deals with boiling chemicals, which of the following pieces of equipment would be most important to protect you from being injured? a. fire blanket b. eye wash c. tongs d. goggles I cant decide between c and d because your eyes do need to...
Sunday, January 13, 2013 at 3:22pm

earth science
#31 strike slips faults are most likely to occur along which type of plate boundary? a. convergent b. transform c. transcontinental d. divergent
Sunday, January 13, 2013 at 3:13pm

earth science
which of the following element are found in the Earths crust? iron oxygen calcium all of the above
Sunday, January 13, 2013 at 3:02pm

earth science
#26 An inference is_____ A" using your sense to gather data B" a conclusion mad based on data C" a prediction about the results of an experiment D" a persons feeling or judgment about something
Sunday, January 13, 2013 at 3:00pm

earth science
#25 seismic waves are similar to sound waves because_______ a/ both are produced by vibrations b/ both are caused by humans c/ they are both produced by radiation d/ seismic waves and sound waves are not similar in any way
Sunday, January 13, 2013 at 2:57pm

earth science
#16 the inner core of the earth is solid because of increased__________ a> density and composition b> density and temperature c> temperature and pressure d> pressure and density
Sunday, January 13, 2013 at 2:52pm

physics
The masses of the earth and moon are 5.98 × 1024 and 7.35 × 1022 kg, respectively. Identical amounts of charge are placed on each body, such that the net force (gravitational plus electrical) on each is zero. What is the magnitude of the charge placed on each body?
Sunday, January 13, 2013 at 1:03pm

Earth Science
1. What are one internal and one external source of energy in the Earth system? 2. Earth scientists assume that the causes of natural events of phenomena can be discovered through... 3. Science constantly creates new technology. Does this new technology always benefit society?
Sunday, January 13, 2013 at 12:12pm

Earth Science
Quartz is made up of___________ a.)silicon and oxygen b.)iron and oxygen c.)silicon and carbon d.)iron and silicon
Saturday, January 12, 2013 at 10:35pm

Earth Science
Seismic waves move faster through which of the following media? a.) water b.) steel c.) oxygen d.) oil Please answer my study guide is due Monday and the teacher hasn't gone over this I looked through my notes and everything. It would really help if you answer...Please ...
Saturday, January 12, 2013 at 10:32pm

Earth science
The inner core of the Earth is solid because of increased___________ a.)density and composition b.)density and temperature c.)temperature and pressure d.)pressure and density
Saturday, January 12, 2013 at 10:28pm

Earth science
Which of the following is MOST similar between the inner and outer core of the Earth? a.)composition b.)pressure c.)movement d.)density
Saturday, January 12, 2013 at 10:26pm

Earth science
What is the primary cause of crustal movement?
Saturday, January 12, 2013 at 10:21pm

physics
In what height the gravitational force with which earth exerts on any object in distance is 5 times smaller than the gravitational force,with which earth exerts in the same object when that object is on earth?
Saturday, January 12, 2013 at 8:16pm

physics
In what height the gravitational force with which earth exerts on any object in distance is 5 times smaller than the gravitational force,with which earth exerts in the same object when that object is on earth?
Saturday, January 12, 2013 at 7:29pm

Earth Science
1. What are one internal and one external source of energy in the Earth system? 2. Earth scientists assume that the causes of natural events of phenomena can be discovered through... 3. Science constantly creates new technology. Does this new technology always benefit society?
Saturday, January 12, 2013 at 6:40pm

Physics
The International Space Station is 370 km above the Earth's surface (Re = 6378 km, Me = 5.98 x 10^24 kg). What is the linear velocity of the space station in m/s
Friday, January 11, 2013 at 12:44pm

math
Which option best explains the sentence below in math terms? The Earth is covered by 30 percent land and 70 percent water.
Friday, January 11, 2013 at 11:38am

College Physics
The masses of the earth and moon are 5.98 × 1024 and 7.35 × 1022 kg, respectively. Identical amounts of charge are placed on each body, such that the net force (gravitational plus electrical) on each is zero. What is the magnitude of the charge placed on each body?
Thursday, January 10, 2013 at 9:17pm

7th grade Social Studies Ms. Sue please!
This homework question was removed due to a copyright claim submitted by Connections Education. My answers: 1. organize information. 2. enough detail. 3. Earth's tilt and orbit 4. new landforms. 5. latitude. 6. polar. 7. birth rates and death rates. 8. They cannot find ...
Thursday, January 10, 2013 at 5:44pm

Physics THRUST
To begin I just need to know how to do thrust. A lunar lander in powered descent at 100 m above the surface of the moon slows down from a velocity of 20 m/s to 0.5 m/s at constant acceleration. Assume that the lander has a mass of 20,000 kg and that burning the fuel does not ...
Thursday, January 10, 2013 at 3:24pm

Science
Compare the nature greenhouse effect process with the human induced. 2. What are the greenhouse gases? Which one is the biggest concern? 3. What are scientists doing to collect data? 4. What role does the carbon cycle play in this problem? 5. What are the political and ...
Thursday, January 10, 2013 at 10:11am

Please CHECK thanks
Please check and tell me what I got wrong and let me know the correct answer for the problem. Thanks. 1. Diarrhea can be caused by a change in diet and different minerals in the water. True (yes) False 2. Fusion produces less radioactivity than fission. True False (yes) 3. ...
Wednesday, January 9, 2013 at 6:31pm

Somebody check this plz..and thanks.
Please check and tell me what I got wrong and let me know the correct answer for the problem. Thanks. 1. Diarrhea can be caused by a change in diet and different minerals in the water. True (yes) False 2. Fusion produces less radioactivity than fission. True False (yes) 3. ...
Wednesday, January 9, 2013 at 4:23pm

Physics
The sun has a mass of 1.99x10 30 kg the earth has a mass of 5.98x10 24 kg and is 1.496x10 11 m from the sun a) Calculate the force of gravity acting on the eaarth by the sun b) CAlculate the force of gravity acting on the sun by the earth
Tuesday, January 8, 2013 at 7:42pm

Science
What are thease layers of earth made of? Crust Lower mantel outer core inner Core. and asthenospher and lithosphere
Tuesday, January 8, 2013 at 7:18pm

Will somebody help me please?
1. Diarrhea can be caused by a change in diet and different minerals in the water. True False 2. Fusion produces less radioactivity than fission. True False 3. Wise travelers eat only cooked vegetables in underdeveloped areas. True False 4. The kilogram is the basic unit of ...
Tuesday, January 8, 2013 at 10:37am

Science
What role does induction play when lightning strikes Earth?
Monday, January 7, 2013 at 9:48pm

I need help..
1. Diarrhea can be caused by a change in diet and different minerals in the water. True False 2. Fusion produces less radioactivity than fission. True False 3. Wise travelers eat only cooked vegetables in underdeveloped areas. True False 4. The kilogram is the basic unit of ...
Monday, January 7, 2013 at 4:48pm

Please guys. Help me out.
1. Diarrhea can be caused by a change in diet and different minerals in the water. True False 2. Fusion produces less radioactivity than fission. True False 3. Wise travelers eat only cooked vegetables in underdeveloped areas. True False 4. The kilogram is the basic unit of ...
Monday, January 7, 2013 at 1:34pm

Science Somebody Help Me Please..I have a deadline
1. Diarrhea can be caused by a change in diet and different minerals in the water. True False 2. Fusion produces less radioactivity than fission. True False 3. Wise travelers eat only cooked vegetables in underdeveloped areas. True False 4. The kilogram is the basic unit of ...
Monday, January 7, 2013 at 1:23pm

Science
I have to do a venn diagram of the earth and mars,how are they alike and how they are different
Monday, January 7, 2013 at 9:00am

Earth Science
How you would determine the density of a block that measures 3 cm X 3cm X 3cm.
Sunday, January 6, 2013 at 7:33pm

Math
The distance from earth to planet X is 1.7(10^7)miles. If a spaceship is capable of traveling 1,420 miles per hour, how many DAYS will it take the spaceship to reach the planet X? Round the answer to the nearest day.
Sunday, January 6, 2013 at 12:18pm

physics
On August 12, 2005 the Mars Reconnaissance Orbiter (MRO) was launched from Earth and reached Mars on March 10, 2006. The orbiter is in roughly circular orbit about 390 km above the martian surface. Mars has a radius of 3396 km and a mass of 0.642 x 1024 kg (6.42E23 kg). Here ...
Friday, January 4, 2013 at 8:39am

Physics
On August 12, 2005 the Mars Reconnaissance Orbiter (MRO) was launched from Earth and reached Mars on March 10, 2006. The orbiter is in roughly circular orbit about 390 km above the martian surface. Mars has a radius of 3396 km and a mass of 0.642 x 1024 kg (6.42E23 kg). b) ...
Thursday, January 3, 2013 at 7:25pm

Physics
On August 12, 2005 the Mars Reconnaissance Orbiter (MRO) was launched from Earth and reached Mars on March 10, 2006. The orbiter is in roughly circular orbit about 390 km above the martian surface. Mars has a radius of 3396 km and a mass of 0.642 x 1024 kg (6.42E23 kg). b) ...
Thursday, January 3, 2013 at 3:18pm

Earth science
Review the 1906 Quake that hit San Francisco and answer the questions below. 1. San Francisco is found to have been constructed on several large strike-slip faults. If these faults become active, what specific type of damage (based on the type of fault involved) would you ...
Thursday, January 3, 2013 at 3:08pm

Algebra II
The weight of a body varies inversely as the square of its distance from the center of the earth. If the radius of the earth is 4000 mi, how much would a 200 lb man weigh 1000 mi above the surface of the earth?
Thursday, January 3, 2013 at 7:23am

earth science
How does the wavelength of the infrared portion of the electromagnetic spectrum differ from that of the visible portion of the spectrum?
Tuesday, January 1, 2013 at 8:39pm

7th grade social studies
1. To pinpoint the absolute location of a place, geographers use (1 point) nearby landmarks. the Atlantic and Pacific oceans. the North and South poles. latitude and longitude. 2. What does the theme of movement help geographers to understand? (1 point) a location's ...
Tuesday, January 1, 2013 at 8:05pm

writing
do you think that life on earth could become this difficult during your life time?what factor could cause to take place ?a story about that shows what life might be like in the world?
Tuesday, January 1, 2013 at 12:39pm

physics
A pendulum and a mass spring system are both undergoing simple harmonic motion on Earth (use g = 10 N/kg). It is observed that every time the pendulum goes back and forth, the spring has gone up and down 14 times. If the pendulum has a length of 5 meters and the mass is 100 g...
Monday, December 31, 2012 at 6:29pm

physics-mechanics
A 1.0 kg mass weighs 9.8 N on Earth's surface, and the radius of Earth is roughly 6.4 x 10^6 m. Calculate the average density of Earth
Thursday, December 27, 2012 at 7:09pm

Physics-mechanics
A 1.0 kg mass weighs 9.8 N on Earth's surface, and the radius of the Earth is roughly 6.4 x 10^6 m. Calculate the average density of Earth. (Show how you would calculate for density; don't just give the answer because L wan't to understand how you arrived at your ...
Thursday, December 27, 2012 at 9:00am

Physics
A 1.0kg mass weighs 9.8 Newton on earth's surface, and the radius of Earth is roughly 6.4 x 10 to the power of 6. The mass of the earth is 6.02 x 10 to the power of 24. Calculate the average density of Earth?
Monday, December 24, 2012 at 11:33am

Astronomy
Suppose the Moon is at a (center-to-center) distance D from Earth. Find an exact expression for the magnitude of the tidal force applied by Earth to our rock of mass m in terms of D, m, the mass of Earth Me (input as M_e), and the lunar radius Rm (input as R_m).
Sunday, December 23, 2012 at 2:36pm

Astronomy
Darwin proposed that the Moon formed far closer to Earth than it is now. Let’s see just how close it could possibly be to Earth and survive. In particular, in the next 4 problems you will find the distance from Earth at which the tidal force due to Earth is sufficient to ...
Sunday, December 23, 2012 at 2:36pm

Astronomy
Consider the same asteroid initially in the asteroid belt at a distance 3 AU from the Sun, and 2 AU from Earth, which collides with Earth. As it falls towards Earth, it acquires kinetic energy (neglect its initial motion) both by being accelerated towards the Sun and towards ...
Sunday, December 23, 2012 at 2:35pm

Astronomy
Consider an asteroid of radius 2 km and density 2,500 kgm3 impacting the Earth. When it collides with the surface its kinetic energy is, to a large extent, dumped into the environment, some as heat vaporizing rock and some as mechanical energy throwing rock to great distance ...
Sunday, December 23, 2012 at 2:35pm

Astronomy
The volume of a ball is given in terms of its radius by V=4π3R3. Use this to find the average density of Saturn, i.e. the mass per unit volume. Use Earth’s mass in kg from the Table of Constants to express your answer in kgm3. Note for comparison that water has a ...
Sunday, December 23, 2012 at 2:34pm

Astronomy
Saturn’s Moon Janus is observed to orbit the planet with period 0.695 days, grazing the planet with an orbital radius only 2.64 times the radius of the planet itself. Use this information to find the mass of Saturn. Express your answer as a multiple of the mass of Earth M...
Sunday, December 23, 2012 at 2:34pm

Need help with ~Social Stusies!
This is a practice so it's rather extensive but it's important i get the points for it so can u please check it thx! 1. To pinpoint the absolute location of a place, geographers use (1 point) nearby landmarks. the Atlantic and Pacific oceans. the North and South poles...
Saturday, December 22, 2012 at 7:20pm

Physics
Kang and Kodos orbit the Earth in a spaceship 20,000 km above Springfield.the period of their orbit (hours) is 11.8 and findthe speed (m/s) their spacecraft travels. b) Speed of spacecraft in meters per second m/s .
Thursday, December 20, 2012 at 10:25pm

Physics
How many times further from the Sun than the Earth is an asteroid with an average orbital period of 7.43 years? (HINT: Let the distance to the Earth be R=1 AU)
Thursday, December 20, 2012 at 10:24pm

Physics
Use Kepler's Laws and data about the Moon to determine the orbital period (hours) of a satellite that is 17512 km above the SURFACE of the Earth. HINT: How does the radius of the Earth affect the problem?
Thursday, December 20, 2012 at 10:20pm

Physics
Kang and Kodos orbit the Earth in a spaceship 20,000 km above Springfield.the period of their orbit (hours) is 11.8 and findthe speed (m/s) their spacecraft travels. b) Speed of spacecraft in meters per second m/s .
Thursday, December 20, 2012 at 10:18pm

Physics...Help!!!
given that Earth's surface gravitaitional field strength has a magnitude of 9.80N/kg, determine the distance(as a multiple of Earth's radius re) above the Earth's surface at which the magnitude of the field strength is 3.20N/kg.
Thursday, December 20, 2012 at 7:37pm

physics
what will happen to the bone structure if earth becomes more dense than its actual density?
Thursday, December 20, 2012 at 5:00pm

Physics
a ship is heading due north at 7.50 m/s relative to the water. The local current is 1.52 m/s in a direction 42 degree west of north. Find its velocity relative to earth( find both direction and magnitude of the velocity)
Wednesday, December 19, 2012 at 3:41am

Phsyics
Determine the magnitude and direction of the gravitational force exerted a) on the Moon by Earth and b) on Earth by Moon.
Tuesday, December 18, 2012 at 7:59pm

algerbra 2
3. Write the function R that models the total number of components that reenter the atmosphere around the earth each year.
Tuesday, December 18, 2012 at 8:32am

Earth Science to DAmon
Give positive and negative effects of climate change in Canada..
Monday, December 17, 2012 at 9:22am

EArth Science
Give positive and negative effects of climate change in Canada..
Monday, December 17, 2012 at 9:21am

social science
Read the speech below. It is a fictitious political speech by Peter, a candidate for the upcoming national election. Then answer the following questions: List all of the arguments in the speech List all of the non-arguments in the speech List all of the factual contents in the...
Monday, December 17, 2012 at 12:12am

Writing
Read the passage below. It is a fictitious political speech by Peter, a candidate for the upcoming national election. Then answer the following questions: 1. List the arguments 2. List the non-arguments 3. List the facts 4. List the non-facts 5. What statements are subjective...
Sunday, December 16, 2012 at 10:08pm

Physics
The weight of an object on Earth is 350 newtons. On Mars, the same object would weigh 134 newtons. What is the acceleration due to gravity on the surface of Mars, given that it is 9.8 meters/second2 on Earth?
Sunday, December 16, 2012 at 2:17pm

English
What is meant by the subthemes: death as pervading life, time as the essence of death and self destruction, night as the environment of death, and death as the great isolator as applied to Pablo Neruda's poems, especially Residence on Earth?
Sunday, December 16, 2012 at 12:29pm

EArth Science to DAMONpl
If sea level has risen by 20 cm over the past century on the coast of North America,by how much do you think it has risen over the past century on the coast of India?Explain.
Saturday, December 15, 2012 at 5:17pm

PLEASE HELP EARTH SCIENCE EMERGENCY!!!!
Describe two complexities about Earth's climate system that results in changes happening faster than expected.
Saturday, December 15, 2012 at 11:53am

algebra please help
The weight M of an object on Mars varies directly as its weighton earth. A person who weighs 95 lb on earth weighs 38 lbs on Mars. How much would a 100 lb person weigh on Mars?
Saturday, December 15, 2012 at 12:03am

Earth Science
Explain why the following statement is incorrect: Climatologists use the data from ice cores to directly measure past temperatures.
Friday, December 14, 2012 at 9:19pm

Earth Science
If sea level has risen by 20 cm over the past century on the coast of North America, by how much do you think it has risen over the past century on the coast of India? Explain.
Friday, December 14, 2012 at 9:07pm

physics
Radio waves of frequency 30 kHz are received at a location 1500 km from a transmitter. The radio reception temporarily “fades” due to destructive interference between the waves travelling parallel to the ground and the waves reflected from a layer (ionosphere) of the...
Friday, December 14, 2012 at 7:07pm

physics
How high does a rocket have to go above the Earth’s surface so that its weight is reduced to 33.7 % of its weight at the Earth’s surface? The radius of the Earth is 6380 km and the universal gravitational constant is 6.67 × 10 −11 N · m 2 /kg 2 . ...
Thursday, December 13, 2012 at 9:33pm

Earth Science
Computer models of Earth's climate project increases in the average temperature from 2°C to 6°C by the end of the century. Have these high temperatures ever occurred before in the past 400 000 years?
Thursday, December 13, 2012 at 7:55pm

physics
Imagine that a new asteroid is discovered in the solar system with a circular orbit and an orbital period of 7 years. What is the average distance of this object from the Sun in Earth units?
Thursday, December 13, 2012 at 2:30am

Physics
(a) Calculate the magnitude of the gravitational force exerted on a 430-kg satellite that is a distance of 2.81 times earth radii from the center of the earth. (b) What is the magnitude of the gravitational force exerted on the earth by the satellite? (c) Determine the ...
Wednesday, December 12, 2012 at 4:51pm

trigonometry
How do i do them? :l 7. At 2:00 P.M., the angle between the hour and minute hands on a clock is 60° (approximately 1.05 radians). The arc length formed by the two hands is 2.63 inches. What is the radius of the clock in inches? (Round to the nearest tenth.) 10. A pulley ...
Wednesday, December 12, 2012 at 10:10am

physics
calculate the value of g at a height of 3600 km above the surface of the earth?
Wednesday, December 12, 2012 at 12:39am

Physics
Compute: a. The velocity of an object orbiting at height of 2 Re above the surface of Earth. b. Compute the orbital period of that object.
Monday, December 10, 2012 at 9:29pm

Physics
How do you find the ratio of the new/ old world periods of a pendulum if the pendulum wee transported from earth to the moon, where the acceleration due to gravity is 1.63m/s^2? Im not sure if we use 9.8 at all, I think I'm supposed to use T=2 pi sqrtL/g.
Monday, December 10, 2012 at 12:47am

Physics
An object of mass .550kg is lifted from the floor to a height of 3.5m at a constant speed. How much work is done by the lifting force (include units)? b.) How much work is done by the Earth on the object? c.) What is the net work done on the object? d.) What is the change in ...
Sunday, December 9, 2012 at 8:28pm

physics- TEST TMRW PLS HELP!
Why is the following situation impossible? A librarian lifts a book from the ground to a high shelf, doing 20.0 J of work in the lifting process. As he turns his back, the book falls off the shelf back to the ground. The gravitational force from the Earth on the book does 20.0...
Sunday, December 9, 2012 at 8:45am

SCIENCE
AT WHAT HEIGHT ABOVE THE EARTH'S SURFACE DOES THE ACCELERATION DUE TO GRAVITY FALL TO 1% OF ITS VALUE AT THE EARTH SURFACE
Sunday, December 9, 2012 at 2:16am

physics- please explain
Why is the following situation impossible? A librarian lifts a book from the ground to a high shelf, doing 20.0 J of work in the lifting process. As he turns his back, the book falls off the shelf back to the ground. The gravitational force from the Earth on the book does 20.0...
Saturday, December 8, 2012 at 3:09pm

Science
If the earth's rotation slowed down, how would that affect the winds in the US?
Friday, December 7, 2012 at 4:28pm

Physics
How far is the center of mass of the Earth-Moon system from the center of the Earth? The Earth's mass is 5.97e24 Kg, the Moon's mass is 7.4e22 Kg, and the distance between their centers is 3.8e8m.
Friday, December 7, 2012 at 12:35pm

physics
Early skeptics of the idea of a rotating Earth said that the fast spin of Earth would throw people at the equator into space. The radius of Earth is about 6400 km. Show why this objection is wrong by determining the following information. (a) Calculate the speed of a 94-kg ...
Thursday, December 6, 2012 at 3:34pm

algebra
the formula d=(square root)12,800+h^2 gives the distance d in kilometers to the horizon from a satellite h kilometers above Earth.Find the distance to the horizon to the horizon from a satellite 4200 km above Earth. Round to the nearest kilometer. PLEASE HELP ME
Thursday, December 6, 2012 at 12:05am

BAA App. Essay Help! (please read!)
One of my personal achievements has to do with artistic. When I was in the 7th grade I participate in the 2012 Reflections Competition. The theme was "Diversity Means...". I decided to do visual arts. In my art work, I drew a huge earth and on top of the earth I drew...
Wednesday, December 5, 2012 at 9:03pm

reading
Why do you think the earth's crust is thicker under land than under bodies of water?
Wednesday, December 5, 2012 at 7:22pm

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