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April 17, 2014

Homework Help: Science: Earth

Recent Homework Questions About Earth

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EARTH SCIENCE
1. Which gas is a source of natural groundwater pollution? A. Carbon B. Oxygen C. Hydrogen D. Radon D? 2. A stream channel is formed when water A. carves a very deep and wide channel into rock. B. carries minerals into the ocean. C. creates a depression, which forms a lake. D...
Thursday, January 23, 2014 at 12:31pm

8th CCA Science
1. Under which of the following conditions would a fossil most likely form? A. A living thing dies and sediment is very slowly deposited on top of its body. B. A living thing dies and sediment quickly covers its body.**** C. A living thing dies and its skeleton is left exposed...
Wednesday, January 22, 2014 at 7:01pm

science help plzzz
Multiple Choice 1. Which of Earth's spheres contains mountains, valleys, and other landscapes? (1 point) atmosphere biosphere geosphere hydrosphere 2. Which of the following are examples of destructive forces? (1 point) ice wind both ice and wind neither ice nor wind 3. ...
Wednesday, January 22, 2014 at 6:44pm

English
Write this in your own words. what is Pollution? Pollution is the introduction of contaminants into the natural environment that cause adverse change.[1] Pollution can take the form of chemical substances or energy, such as noise, heat or light. Pollutants, the components of ...
Wednesday, January 22, 2014 at 3:00pm

Earth and Space Science
The troposphere and the stratosphere
Wednesday, January 22, 2014 at 12:38pm

Ed tech
I agree with the two answers you named. Since I haven't seen any Google Earth tour of anything, I don't know about #6. It's probably C or D, but I really don't know. Did YOU take that particular tour? What did you see/hear?
Wednesday, January 22, 2014 at 12:10pm

help-3 questions
5. Which of the following is an important criterion for evaluating the effectiveness of a graphic organizer? how colorful it is how well it conveys information how many pages it is how many words it contains 6. How was information conveyed in the Google Earth tour about ...
Wednesday, January 22, 2014 at 11:50am

social studies
I need to answer the questions on my study guide, it is my homework but I forgot my book,I need to read chapter 3 it's about our earth,s renewable and non renewable resources.where else I find out about it
Tuesday, January 21, 2014 at 8:38pm

science
What is the acceleration of a 7kg rocjet if a force of 68.6 kg m/s/s (N) is used to move it away from the earth
Tuesday, January 21, 2014 at 7:53pm

Physics
A 33.4 kg child, with a 3.05 kg backpack on his back, first stands on a sidewalk and then jumps up into the air. Find the force (positive up/negative down) on the sidewalk from the child when the child is (a) standing still and (b) in the air. Now find the net force (positive ...
Tuesday, January 21, 2014 at 2:55pm

Science
Can someone please please help me? I don't have a text book, i have a online book and it isn't working. Can someone please be nice and help me? Science isn't my subject! 1. Why is Earth’s temperature just right for life? (1 point) Earth’s core is hot ...
Tuesday, January 21, 2014 at 12:12pm

someones GOTTA help me with this science...!!!
1. Which of the following describes the correct sequence of events during the water cycle? (1 point)precipitation ¨ condensation ¨ evaporation ¨ runoff condensation ¨ precipitation ¨ runoff ¨ evaporation runoff ...
Monday, January 20, 2014 at 9:25pm

intro to psychology
Ten inches a day? This question has an error. The rainiest places on earth average a little more than one inch a year. http://www.weather.com/news/science/natu​re/wettest-place-earth-20130529
Monday, January 20, 2014 at 4:32pm

Physics
Suppose that a binary star system consists of two stars of equal mass. They are observed to be separated by 380 million kilometers and take 9.0 Earth years to orbit about a point midway between them. What is the mass of each? ------------------------------- I've worked ...
Sunday, January 19, 2014 at 7:35pm

Science
1. Which type of eclipse would you expect to see if the moon passes directly between Earth and the sun? (1 point) a solar eclipse* a lunar eclipse a total lunar eclipse a penumbra 2. Which of the following statements about a lunar eclipse is true? (1 point) A lunar eclipse can...
Sunday, January 19, 2014 at 6:30pm

Science
1. Which type of eclipse would you expect to see if the moon passes directly between Earth and the sun? (1 point) a solar eclipse* a lunar eclipse a total lunar eclipse a penumbra 2. Which of the following statements about a lunar eclipse is true? (1 point) A lunar eclipse can...
Sunday, January 19, 2014 at 4:58pm

physics- multiple choice
1. A transport truck pulls on a trailer with a force of 600N [E]. The trailer pulls on the transport truck with a force a) of zero b) of less than 600 N is the truck is slowing down c) equal to 600 N only if the truck is moving at constant velocity d) equal to 600 N no matter ...
Sunday, January 19, 2014 at 2:10pm

Earth Science
Mass of silver=5cm^3 * 10.5g/cm^3=52.5g. Mass of gold=5cm^3 * 19.3g/cm^3 = 96.5g.
Saturday, January 18, 2014 at 9:52pm

biology
Think earth and life.
Saturday, January 18, 2014 at 5:39pm

Earth Science
Silver has a density of 10.5 g/cm cubed, and gold has a density of 19.3 g/cm cubed. Which would have the greater mass, 5cm cubed of silver or 5 cm cubed of gold?
Friday, January 17, 2014 at 6:29pm

science help plzzz
1. Which of the following statements best defines tides? (1 point) when waves get bigger because of an approaching storm the rise and fall of ocean water that occurs about every 12.5 hours the rise of ocean water that occurs 12 times a day a giant wave that can be extremely ...
Friday, January 17, 2014 at 5:29pm

Science
Geothermal energy comes from the earth. http://en.wikipedia.org/wiki/Geothermal_​heating
Friday, January 17, 2014 at 4:32pm

math
a pit is dug in the shape of a cuboid with dimensions 10m*8m*3m. the earth taken out is spread evenly on a rectangular plot of land with dimensions 40m*30m. what is the increase in the level of the plot.
Friday, January 17, 2014 at 7:45am

science
tell what you believe would happen if the earth suddenly stopped spinning and you were in the part of the world that had sunlight 24 hours a day. Include such things as how this would affect your sleep, work, school and crime.
Friday, January 17, 2014 at 7:06am

science
Tell what you believe would happen if the earth suddenly stopped spinning and you were in the part of the world that had 24 a day.Include such things as how this would affect your sleep, work, school and crime?
Thursday, January 16, 2014 at 10:45pm

Earth Science
http://wiki.answers.com/Q/What_is_the_di​fference_between_partial_melting_and_fra​ctional_crystallization You can find your answer at the above URL
Thursday, January 16, 2014 at 10:17am

Earth Science
Analogy: melting is to freezing as partial melting is to _______? a. partial freezing b. magma. c. boiling. d. fractional crystallization.
Thursday, January 16, 2014 at 9:24am

science
1.Which type of eclipse would you expect to see if the moon passes directly between Earth and the sun? -a solar eclipse -a lunar eclipse -a total lunar eclipse -a penumbra 2.Which of the following statements about a lunar eclipse is true? -A lunar eclipse can occur when the ...
Wednesday, January 15, 2014 at 11:39am

Physics
since F ∝ 1/r^2, 1/(2r)^2 = 1/4 * 1/r^2, so the pull would be 1/4 as much. Of course, that ignores the tremendous torque on the ladder caused by the earth's spin! :-)
Wednesday, January 15, 2014 at 11:22am

Science
I think the ones marked * are incorrect. 1A *2B - think about it - the moon is directly opposite the sun, so the earth casts its shadow. The moon is full. 3B 4D (see #1!) *5A (see #3!) 6B *7C - the illuminated portion is more than half the circle *8A - none of it hits earth; ...
Wednesday, January 15, 2014 at 11:00am

Science
1.Which type of eclipse would you expect to see if the moon passes directly between Earth and the sun? -a solar eclipse -a lunar eclipse -a total lunar eclipse -a penumbra 2.Which of the following statements about a lunar eclipse is true? -A lunar eclipse can occur when the ...
Wednesday, January 15, 2014 at 9:57am

Physics
If you stood atop a ladder that was so tall that you were twice as far from Earth's center, how would your weight compare with its present value?
Tuesday, January 14, 2014 at 10:15pm

Physics
To better comprehend the magnitude of the gravitational force between Earth and the moon, pretend gravity is turned off and the pull replaced by the tension in a steel cable need to be?
Tuesday, January 14, 2014 at 10:13pm

8th Grade Earth Science Help?
no problem. As you can see, a little effort on your part will often provide the answer.
Tuesday, January 14, 2014 at 7:54pm

8th Grade Earth Science Help?
Well, I got the answer right. Thanks for your help.
Tuesday, January 14, 2014 at 7:46pm

8th Grade Earth Science Help?
Which of the following terms refers to the time it takes for one-half of the radioactive atoms in a sample of a radioactive element to decay? - relative age - absolute age - potassium-argon data - half-life** Is my answer correct?
Tuesday, January 14, 2014 at 7:05pm

Science/math
you need to find the volume of the ice sheet Then you need to figure how many m^3 of water that would be when melted Then you need to find the area of the earth's water surface. Then divide the ice-water volume (m^3) by the earth's water-surface area (m^2), giving the ...
Tuesday, January 14, 2014 at 4:23pm

science
Volcanoes might end an ice age. This might be of interest: http://news.sciencemag.org/earth/2012/07​/did-marine-snot-cause-ice-ages
Tuesday, January 14, 2014 at 2:01pm

science
all of the following are explanations for glacial periods EXCEPT. a. varying solar energy b. volcanism c. biological organisms d. Earth's orbit's precession
Tuesday, January 14, 2014 at 1:27pm

PHYSICS
n the lecture, we discussed the case of an isothermal atmosphere where the temperature is assumed to be constant. In reality, however, the temperature in the Earth's atmosphere is not uniform and can vary strongly and in a non-linear way, especially at high altitude. To a ...
Monday, January 13, 2014 at 5:34pm

Science
1. Which of the following can be expected to occur as climate change continues on Earth? (1 point) decreased melting of sea ice decreased migration of pests and pathogens increased freshwater sources increased coastal flooding 2. Which piece of children’s’ playground...
Monday, January 13, 2014 at 3:05pm

physics
T = 2 pi sqrt(L/g) I could compute T for the two values of g but the change in g is small so better to use calculus for sport let's make L = 1 meter T = 2 pi sqrt L (g^-.5) =2 pi sqrt(1/9.81) = 2 Seconds for L = 1 and g = 9.81 dT/dg = 2 pi sqrt L(-.5)(g^-1.5) so dT = - pi ...
Monday, January 13, 2014 at 2:21pm

Science
1. Which of the following can be expected to occur as climate change continues on Earth? (1 point) decreased melting of sea ice decreased migration of pests and pathogens increased freshwater sources increased coastal flooding 2. Which piece of children’s’ playground...
Sunday, January 12, 2014 at 8:26pm

PHYSICS(HELP)
In the lecture, we discussed the case of an isothermal atmosphere where the temperature is assumed to be constant. In reality, however, the temperature in the Earth's atmosphere is not uniform and can vary strongly and in a non-linear way, especially at high altitude. To a...
Sunday, January 12, 2014 at 9:25am

maths
The total population of the earth was estimated to be 6.42 billion people.Given that the total land surface area of the earth is about 1.5×10^8km^2.Find the average number of people living in 1 km^2 of land on earth,correct to 2 significant figures.Thanks a lot for ...
Saturday, January 11, 2014 at 11:02pm

Science
Let: Star = Sun Planets = Earth It's much simpler to understand the question with what we know. Now to answer your question: The gravity of the Sun keeps the earth in it's orbit. This is also true as the Moon orbits the Earth because of the pull of Earth's gravity...
Saturday, January 11, 2014 at 5:19pm

science help!
Now I did g relative to g earth for someone a few minutes ago http://www.jiskha.com/display.cgi?id=138​9396878 so g out there = 9.81*6370^2/6470^2) = 9.51 m/s^2 so Fg = 1500 * 9.51 Fg = 14364 Newtons now before you ask F = m a F/m = a = 9.51 = v^2/r so v^2 = 9.51 r =
Friday, January 10, 2014 at 7:21pm

science help!
A satellite is placed in orbit 100 km above the surface of the earth (radius = 6370 km, mass = 5.98 x 1024 kg). If the satellite has a mass of 1500 kg, what is the force of gravity acting on it?
Friday, January 10, 2014 at 7:12pm

physics
A satellite is placed in orbit 100 km above the surface of the earth (radius = 6370 km, mass = 5.98 x 1024 kg). What is the value of the acceleration of gravity at that altitude as a percentage of the acceleration at the surface of the earth?
Friday, January 10, 2014 at 6:34pm

Science question
Coal is solid, the other substances are liquids and gas Answ A http://library.thinkquest.org/3646/earth​/resources/fosfuels.html
Friday, January 10, 2014 at 5:10pm

What Does This Mean?
This looks like a fairly straightforward question, but I am not getting exactly what they are trying to say. "Earth's energy sources include both renewable and nonrenewable resources. Name at least three sources of energy that could be used in your house. Then ...
Friday, January 10, 2014 at 1:47pm

Science
Why is freshwater a limited resource? A. because most water on Earth is in lakes B. because most water on Earth is in clouds C. because most water on Earth is in the ground D. because most water on Earth is saltwater D
Friday, January 10, 2014 at 1:14pm

Science
Which compound causes the depletion of Earth's ozone layer? A. ultraviolet radiation B. chlorofluorocarbon C. carbon dioxide D. sulfuric acid B How does a nuclear power plant produce energy? A. through solar panels B. through nuclear fission reactions C. through geothermal...
Friday, January 10, 2014 at 1:11pm

Classical mechanics
In the lecture, we discussed the case of an isothermal atmosphere where the temperature is assumed to be constant. In reality, however, the temperature in the Earth's atmosphere is not uniform and can vary strongly and in a non-linear way, especially at high altitude. To a...
Friday, January 10, 2014 at 10:07am

Physics Classical Mechanics Help ASAP
In the lecture, we discussed the case of an isothermal atmosphere where the temperature is assumed to be constant. In reality, however, the temperature in the Earth's atmosphere is not uniform and can vary strongly and in a non-linear way, especially at high altitude. To a...
Friday, January 10, 2014 at 8:01am

Science
1. Which of the following can be expected to occur as climate change continues on Earth? (1 point) decreased melting of sea ice decreased migration of pests and pathogens increased freshwater sources increased coastal flooding 2. Which piece of children’s’ playground...
Friday, January 10, 2014 at 12:47am

Earth science
In a few sentences, explain how information from paleoglaciation and paleomagnetism support the idea that continental plates have moved over the past several million years.
Friday, January 10, 2014 at 12:00am

earth
Suppose a geologist is studying two distinct areas next to a spreading ridge. The magnetic direction of the minerals in the oldest area is opposite to the magnetic direction of minerals in the newest area. (a) Which area is closest to the centre of the ridge, the older or ...
Thursday, January 9, 2014 at 11:59pm

Earth Science
Yes, the answer is A. Erosion has worn down the Appalachians, and they are older than the Rockies.
Thursday, January 9, 2014 at 4:33pm

Earth Science
Thx Richard and Ms. Sue i think i might get this.
Thursday, January 9, 2014 at 4:23pm

Earth Science
ummm A?
Thursday, January 9, 2014 at 4:22pm

Earth Science
My first guess was A but then i read B this is confusing
Thursday, January 9, 2014 at 4:20pm

Earth Science
No.
Thursday, January 9, 2014 at 4:17pm

Earth Science
I'll be glad to check your answer.
Thursday, January 9, 2014 at 4:10pm

Earth Science
The Rocky Mountains are more jagged than the Appalachian Mountains. This suggests that • erosion has worn down the Appalachian Mountains more than the Rocky Mountains. • the Rocky Mountains are older. • the Appalachian Mountains are more likely to experience ...
Thursday, January 9, 2014 at 4:09pm

Science help urgent :/
I need to help my brother with this, he waited till the last minute to complete his homework... 1. _________ is a solid fossil fuel that forms from plant remains. Coal Hydrocarbon Natural gas Petroleum 2. Air pollution can be controlled by permitting more storm runoff. burning...
Wednesday, January 8, 2014 at 10:45pm

SCIENCE HELP PLEASE
NO we always see the same side of the moon because its rotational period is the same as its orbital period (about 28 days) if the moon rotated every 24 hrs (like Earth), then you would see different parts of the moon during its orbit
Wednesday, January 8, 2014 at 7:06pm

SCIENCE HELP PLEASE
Suppose the moon rotated on its axis just as quickly as Earth. Would you still always see the same side of the moon from Earth? *HELP ME PLEASE*
Wednesday, January 8, 2014 at 5:59pm

Science
What would be the effect on the seasons and the northern and southern hemispheres if Earth were not tilted? Explain your answer. *PLEASE HELP ME*
Wednesday, January 8, 2014 at 5:55pm

EARTH SCIENCE
how fast are a hurricanes winds?
Wednesday, January 8, 2014 at 4:53pm

EARTH SCIENCE
1. Which gas is a source of natural groundwater pollution? A. Carbon B. Oxygen C. Hydrogen D. Radon D? 4. A stream channel is formed when water A. carves a very deep and wide channel into rock. B. carries minerals into the ocean. C. creates a depression, which forms a lake. D...
Wednesday, January 8, 2014 at 3:10pm

EARTH SCIENCE
You guys should really do your own work cause how do we know what these people are saying is true not trying to be a rab
Wednesday, January 8, 2014 at 10:09am

EARTH SCIENCE
Thanks. 1 is it D? 4 is it D? 5 is it A?
Wednesday, January 8, 2014 at 9:46am

EARTH SCIENCE
Thanks. 1 is it D? 4 is it D? 5 is it A?
Wednesday, January 8, 2014 at 9:37am

EARTH SCIENCE
you are correct on 2 and 3
Wednesday, January 8, 2014 at 6:54am

EARTH SCIENCE
1. Which gas is a source of natural groundwater pollution? A. Carbon B. Oxygen C. Hydrogen D. Radon C? 2. Which of the following statements best describes chemical weathering? A. It happens only in cool environments. B. It's the type of weathering in which rocks and ...
Tuesday, January 7, 2014 at 10:41pm

EARTH SCIENCE
1. is not D (125gallons)
Tuesday, January 7, 2014 at 3:21pm

EARTH SCIENCE
#1 would be D #2 would also be D
Tuesday, January 7, 2014 at 3:14pm

Physics help quick!
22. What does it mean for a force to act in accordance with an inverse square law? The square of the force is inversely proportional to the distance. The force decreases if the distance increases. The force is directly proportional to 1/r2 where r is the distance. The force is...
Tuesday, January 7, 2014 at 2:28pm

EARTH SCIENCE
1. What measurement best describes the results of a scientific experiment regarding volume? A. 1425 mL B. 5 quarts C. 2 pints D. 125 gallons A? 2. How is the mass number calculated for an element? A. The product of neutrons and protons B. There is no calculation. C. The ...
Tuesday, January 7, 2014 at 1:52pm

Science check answer quick!
Which of these does Newton's law of universal gravitation imply? (Points : 1) The force of gravity between two objects is inversely proportional to the product of the two masses. <-- NO!!!!!!!!!! DIRECTLY PROPORTIONAL +++++++++++++++++++++++++++ Earth's gravity acts...
Tuesday, January 7, 2014 at 1:17pm

Science check answer quick!
I really do not understand Number 7 Which of these does Newton's law of universal gravitation imply? (Points : 1) The force of gravity between two objects is inversely proportional to the product of the two masses. <-- Earth's gravity acts on people inside a space ...
Tuesday, January 7, 2014 at 12:43pm

physics
assuming this scale is located on earth where g is approximately 9.81 m/s^2 then mass in kg = Force/g = Force in Newtons / 9.81
Tuesday, January 7, 2014 at 12:34pm

please help me!! with this science!!!!!
Multiple Choice 1. Which sphere of the Earth system contains all living organisms? (1 point) atmosphere biosphere geosphere hydrosphere 2. Which of the following statements best describes the geosphere? (1 point) the sphere that consists of solid rock layers near Earth’s ...
Tuesday, January 7, 2014 at 4:52am

physics
What is the ratio of the spin angular momentum of the earth and its orbital angular momentum about the sun. The mean radius of the earth is R=6400km. The radius of the earth's orbit is r=1.5*10^8km. You may assume the mass of the earth is uniformly distributed throughout ...
Monday, January 6, 2014 at 1:06pm

science
I assume you mean by rotation, angular velocity, or period of rotation, and assuming you NEVER Moved. IF you look up a night at the moon, and see point A, then in 24 hours, look up and see point A if the moon remains motionless. Nice. However, the moon is in orbit about the ...
Sunday, January 5, 2014 at 1:11pm

science
Since this was not my area of expertise, I hesitated to answer. Are you assuming that they are both rotating in the same direction? However, my assumption is that, since the sizes of the planets are different, the same side would NOT always be seen from the earth.
Sunday, January 5, 2014 at 12:56pm

science
Suppose the moon rotated on it axis just as quickly as Earth. Would you still always see the same side of the moon from Earth? *PLEASE HELP ME WITH THIS QUESTION*
Sunday, January 5, 2014 at 12:41pm

Science help.
Where is most freshwater on Earth found? lakes and rivers oceans and seas underground ice caps and glaciers How does algal growth caused by agricultural waste kill marine organisms? by blocking sunlight and depleting oxygen by increasing oxygen levels in the water by ...
Saturday, January 4, 2014 at 6:24pm

physics
rank the average gravitational force from greatest to least between (a) sun and mars (b)sun and moon (c) sun and earth include an explanation PLEASE!!!!
Friday, January 3, 2014 at 12:22pm

biology - natural selection
Which of these is the foundation for relative dating? A. Earth is very old. B. Deeper rock strata are older. C. Radioisotopes decay at a constant rate. D. Organisms can be closely related to each other.
Thursday, January 2, 2014 at 9:49pm

science
Suppose the moon rotated on it axis just as quickly as Earth. Would you still always see the same side of the moon from Earth? *PLEASE HELP ME WITH THIS QUESTION*
Thursday, January 2, 2014 at 6:02pm

Physics
The sun outputs 1380 W/m^2 of energy at the earth's surface. A small rectangular las has the following dimensions: 1km wide, 1.4km long, and 300m deep A) Calculate the thermal energy added to the lake if exposed to 12h of direct sunlight. B) calculate the increase in ...
Thursday, January 2, 2014 at 3:46pm

science
Suppose the moon rotated on it axis just as quickly as Earth. Would you still always see the same side of the moon from Earth? *PLEASE HELP ME WITH THIS QUESTION* Answer this Question
Thursday, January 2, 2014 at 11:07am

Physics
Calculate the minimum change in velocity (delta v or ∆v) required for the space shuttle to decrease its altitude to 60 miles when it’s orbiting with an apogee of 246 miles and a perigee of 213 miles above the surface of Earth.
Wednesday, January 1, 2014 at 6:31pm

science/planets
I don't think the answer would be A or B because the Earth only has one moon, it doesn't have more than one moons and the Earth doesn't have extreme temperatures that are above freezing. So I can easily rule out A and B. But the Earth does have fairly long days and...
Monday, December 30, 2013 at 2:34pm

science/planets
Q: What two things does Earth have in common with the outer planets called gas giants? A: A)relative temperatures above freezing B)moons and magnetic field C)fairly long days and short nights D)volcanic activity and geysers
Monday, December 30, 2013 at 2:28pm

Science help.....
Explain why Earth and other planets were not solid when they formed during the beginning of the Precambrian, approximately 4,600 million years ago (MYA). What was this particular time period called, and why is this time period not really considered a partof Earth’s ...
Monday, December 30, 2013 at 12:55pm

physics
We release an object of mass M at zero speed at a distance of 2*10^6 Km from the center of the earth. What is the speed at which the object hits the earth? G=6.67*10^-11; g= 9.8 m/s; M=5.97*10^24; r=6.3781*10^6 Suppose the mass of the object is M= 500 kg. What is the kinetic ...
Friday, December 27, 2013 at 4:34pm

Physics
The shuttle must perform the de-orbit burn to change its orbit so that the perigee, the point in the orbit closest to Earth, is inside of Earth's atmosphere. De-orbit maneuvers are done to lower the perigee of the orbit to 60 miles (or less). An altitude of 60 miles is ...
Thursday, December 26, 2013 at 3:28am

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