SCIENCE/ earth

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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 ...

environmental science
The earth's differentiation and size were significant factors for life on Earth because Earth's composition and gravitational attraction

Science
Find the gravitational acceleration if a spaceship at a distance equal to double of earth's radius from the centre of the earth (g on earth is 9.8 m/s)

science
Find the gravitational acceleration if a spaceship at a distance equal to double of earth's radius from the centre of the earth (g on earth is 9.8 m/s^2)

earth science
describe a possible pathway of carbon through the four spheres of the earth.Identifty what each the fourspheres of the earth contains

Science
What is the circular velocity of an Earth satellite 1000. km above Earth's surface? (Note: Earth's average radius is 6371 km.)

Science
On the main sequence, what type will have life spans of about ten billion years? I took Earth Science last year so although I do not have them in front of me, I believe the are in the Earth Science Reference Tables (ESRT).

Science
Approximately what percentage of the estimated age of Earth does the Cenozoic Era represent and how do you know? look at pg. 9 in Earth Science Reference Tables? a. 1.4% b. 5.0% c. 11.9% d. 65.0%

science
________ is the study of the earth. Just need to know if my answer or right or wrong. Thanks! :) Geology (Earth Science)

science
How far away from the earth does acceleration due to gravity become 1% of its value at the earth's surface. Assume that the earth is a sphere of radius 638000000cm.

Science
Luis wanted to create a clay model of earth and the sun. To show how Earth rotates, Luis wants to use a toothpick to represent Earth's axis of rotation. Where should Luis place the toothpick? A. Horizontally through Earth in the direction Earth is traveling B. Vertically ...

earth science
Traditionally,how have different fields of earth science been studied?

earth science
What are two lines of evidence that indicate that earth is rotating? What is the motion of the stars at night? What does the Sun do in the day? i want to seach features of the earth in its inner structure

Earth Science
Earth is always changing. What are two forces that cause the earth's surface to constantly change and what are their effects on the planet? Please answer within a few minutes.

AP environmental Science
What formula would i use to solve: If the earth has an annual growth rate of 1.2% how many people are added to the earth each year? what will be the population of earth in 2050? thanks, any help is appreciated!! :D

Science
Luis created a clay model of earth and the sun to show how earth rotates, Luis wants to use a toothpick to represent earths axis of rotation Where should he put the toothpick A - horizontally through earth in the direction earth is traveling B - vertically through the center ...

Science
Luis created a clay model of earth and the sun to show how earth rotates, Luis wants to use a toothpick to represent earths axis of rotation Where should he put the toothpick A - horizontally through earth in the direction earth is traveling B - vertically through the center ...

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?

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?

HELP SCIENCE
Luis created a clay model of earth and the sun to show how earth rotates, Luis wants to use a toothpick to represent earths axis of rotation Where should he put the toothpick A - horizontally through earth in the direction earth is traveling B - vertically through the center ...

science
The pull of gravity keeps the Moon in orbit around Earth. The distance between the Earth and Moon is about 380,000 kilometers. A crew of astronauts leaves Earth on a Monday and lands on the Moon on a Thursday. They land on the side of the Moon facing away from the Earth. On ...

Science
Compared with the strength of Earth's gravity at its surface, how much weaker is gravity at a distance of 10 Earth radii from Earth's center? At 20 Earth radii?

Physical Science
Here's a question from my homework that I have no idea where to even beging with it. A European "weighs" 100 kg on Earth. a. What is his mass on Earth? b. What is his weight on Earth? c. What is his mass on the moon where the acceleration due to gravity is 1/6 that of the ...

Earth Science
Describe how Earth would be different today if. It contained no radioactive material. What would the consequences be for the Earth's interior layer?

Earth Science
Describe how Earth would be different today if it contained no radioactive material. What would the consequences be for the Earth’s interior layers?

Science
Why doesn't the space station fall toward the earth, instead of remaining in space? a) It is beyond the earth's gravitational pull. B) The earth's gravity is balanced out by the attraction of the sun and other planets. C) Centrifugal force keeps it up. D) It does fall toward ...

science
an imaginary dense star Z has 1/5 the radius of earth, but 1000 times earth's mass. How much would a masss weighing 1.0 N on earth weigh on Star z

science
How much below the surface of the earth does the acceleration due to gravity become 1percent of its value at the earth surface? The earth is assume to be a sphere of radius 6.4×10^6m.

science
A distant spaceship carrying a red headlight, emitting light with wavelength 600nm, is heading towards the earth. Observers on the earth detect the light from the headlight as ultraviolet light with wavelength 200nm. What is the velocity of the spaceship? b) As the space ship ...

Science
An artificial satellite circles around the earth at the height where the gravitational force is one fourth of that at earth's surface. If the earth's radius is R the height of the satellite above the surface of the earth is?

science
A person who weighs 600 newtons on Earth would weigh only 100 newtons on the Moon. Which statement best explains why? A.The circumference of Earth is larger than that of the Moon. B.The density of Earth is greater than that of the Moon. C.The mass of Earth is greater than that...

Earth Science
What are two forces that cause the Earth's surface to constantly change and what are their effects on the planet? Please help I do homeschooling and I'm super behind in science please answer before 12:00 p.m. on 11-17-09

science
True or false A.the moon revolves around the earth B.it takes one year for the earth to revolve around the sun Che earth rotates once a day

science
The earth's differentiation and size were significant factors for life on Earth because Earth's composition and gravitational attraction _____. A-keep the moon and sun in orbit B-keep people grounded C-helped to create and retain Earth's atmosphere D-create and retain internal...

Science
The Sun exerts a gravitational force of 3.56 x 10^22 N on Earth. The mass of the Sun is 2.0 x 10^30 kg. The mass of the Earth is 6.0 x 10^24 kg. If we assume the Earth has a circular orbit of 1.5 x 10^11 m, what is the velocity needed for Earth to remain in orbit?

Earth Science
What are the two most common minerals located in Earth's crust? (A. Feldspar and quartz) B. Iron and copper C. Diamonds and gold D. Salt and saline Climatology is a subspecialty of A. environmental science. B. oceanography. (C. meteorology.) D. marine biology.

Earth Science
i need help on a question "Describe how Earth would be different today if it contained no radio active material. What would the consequences be for the Earth's interior layers?" please help and thanky you

Earth Science
i need help on a question "Describe how Earth would be different today if it contained no radio active material. What would the consequences be for the Earth's interior layers?" please help and thanky you

Physical Science
Many people mistakenly believe that the astronauts who orbit Earth are "above gravity." Earth's mass is 6×1024kg, and its radius is 6.38×106m (6380 km). Use the inverse-square law to find a height above Earth's surface at that the force of gravity on a shuttle is about 89 % ...

science
A spaceship of mass 2000kg is moving towards planet Earth. Calculate the magnitude of the force that the earth exerts on the spaceship when the spaceship is 100km above the surface of the Earth. The Earth has a mass of 6*10 to the power of 24 kg and a radius of 6,4*10 to the ...

physcial science
How do I calculate the orbital velocity of a satellite that is 400 miles above the earth? Set the centripetal acceleration V^2/(R+h) equal to the gravitational acceleration, g * [R/(R+h)]^2 Then solve for V R is the earth's radius and h is the 400 mile height. g is the ...

earth science
compared to earth, earth jupiter

Science
How does life on Earth depend on the sun? I put If the Earth is too near from the sun then it will be too hot and we wouldnt't be able to live. But if the Earth is too far from the Sun then it would be too cold. Is that a right answer?

Science
The moon is about 384000 km the earth and its paths around earth is circular. The moon taken 24hr to complete one orbit. The speed at which the moon orbits the earth in km/ hour is

Earth science
Hello! Does Jiskha have Earth Science tutors? If not, could someone direct me to a site where I could ask for help? My questions regard finding out specific heat capacity and heat of fusion and heat of vapourization of water. Thank you!

Earth science
How long an exposure would a photographer need to photograph star trails that are complete circles? Why? The star Sirius is 4.3 light years from Earth. Determine the distance to Sirius in km and in astronomical units. THe moon's average distance from Earth is about 380,000 km...

Science
The weight of a body on the surface of the earth is 392N .What will be the weight of this body on a planet whose mass is double that of the earth and radius is four times that of the earth

Science
Here is a question on my science worksheet, "if a projectile's fall matches Earth's 'BLANK', the projectile will not hit earth." i need help figuring out what would go in the blank!

science
The earth exerts a force of 2200N on an orbiting communications satellite that is 35mi above the earth..What is the magnitude of the force the satellite will exert on the earth??

science
Large craters are visible on the moon but not common on the earth's surface. Which of the following is the beady explanation of why large craters are not evident in the earth's surface in photos taken from space. A.three quarters of the earth's surface is covered by land. B....

Science
Here's my question--- Precession of earth's axis causes- a-axial tilt b-a change in the north pole star c-seasons d-day and night My answer was a- m i rite? Precession of earth's axis caused by the centrifugal force of the Earth's rotation... =) The cause of the precession is ...

physics
Find the distance (measured in earth radii, RE) from the center of the earth to a point outside the earth where the acceleration of gravity due to the earth is exactly one ninth of its value on the surface of the earth.

science
why can you never see the far side of the moon from Earth ? a) because earth is spinning too quickly b) because it cannot be seen during daylight hours c) because the moon rotates once on its axis in the same time that it takes to revolve around earth d) because the moon does ...

Earth Science
My child is doing a project on the earth. He is trying to do a power point presentation on the earth. He ran across information that stated, "The earth is divided into several layers which have distinct chemicals and seismic properties". He would like to know something that he...

Physical science
When you drop a 0.36 kg apple, Earth exerts a force on it that accelerates it at 9.8 m/s^2 toward the earth's surface. According to Newton's third law, the apple must exert an equal but opposite force on Earth. If the mass of the earth 5.98x10^24 kg, what is the magnitude of ...

science
If we drilled a hole straight through the earth, and dropped a golf ball down the hole, starting initially at rest, how fast would the ball be traveling when it reached the center of the earth. The earth’s radius is 6378 km.

Science
Which statement correctly describes the sun and earth? a. the sun and earth both have water. b. the sun and earth both have a surface called the crust. c. the sun and earth both have an atmosphere d. the sun and earth both have breathable air

science
When astronauts travel into space, they can still see Earth and the moon. why is this possible? A. The sun shines in the windows of their space vehicle. B. They view earth and moon through a telescope. C. The sun's light reflects off earth and the moon. D. The astronauts look ...

Physics
At the heighest point on earth, the distance to the center of the earth is approximately equal to 1.0014 times the radius of the earth. What would be in N/kg the magnitude of the gravitational field (g) due to the earth at that position? Assume 9.8 N/kg for g at the surface of...

earth science
how does radioactive decay provide heat energy within the earth

Earth Science
Upon what measurement is the Earth's latitude and longitude system based?

Science
How Does Earth's atmosphere make conditions on Earth suitable for living things?

earth science
how does the apparent diameter of the sun from earth affect the orbital velocity?

Science
WHICH SYSTEM HAS THE GREATEST TIDAL EFFECT? EARTH-SUN OR EARTH-MOON?

Science
What would happen to ocean tides on Earth if Earth stopped rotating?

Earth Science
Why is the speed of Earth's rotation different at the equator than it is at the poles?

Science
If Earth's mass were smaller, how would Earth's gravity be affected?

Earth Science
Does energy flows through the Earth's system by heat?

Science
The mass of astromout measured on earth in 8500g. What will be his weight on earth

earth science
" A condition of gravitational and bouyant equilibrim between earth's litosphere and asthenosphere" ... is what?

Science
How does the earth's tilt affects how directly light reaches different parts of the earth?

earth science
describe five ways earth's oceans affect our life?

Earth Science
Can someone five me an example of how carbon cycles through the Earth's system?

physical science
The orbital velocity of an earth satellite in an orbit 400 mi above the earth?

science
if yourweight is 60N on earth,how far should you go from the center of the earth so that your weight will be 300N

Science
The cause of the seasons on Earth is often mistakenly attributed to the elliptical orbit of Earth around the sun. What is the actual cause of the seasons? Tha actual cause of the seasons is because of the tilt of Earth's axis. please correct me if i'm wrong, thanks :-)

Science
The cause of the seasons on Earth is often mistakenly attributed to the elliptical orbit of Earth around the sun. What is the actual cause of the seasons? Tha actual cause of the seasons is because of the tilt of Earth's axis. please correct me if i'm wrong, thanks :-)

science
a crew of astronauts leaves earth on a Monday , lands on the moon on a Thursday. they and on the side of the moon facing away from the earth. on what day would the astronauts be able to see earth from the moon, explain

Earth science
Which single factor generally has the greates effect on the climate of an area on the earth's surface?

Earth science
Earth’s troposphere, hydrosphere, and lithosphere contain relatively large amounts of which element?

Science
What the force of attraction between earth and objects on earth surface pesanteur..I need it English

earth science
how are scientist approaching the study of Earth today?

earth science
decribe the composition and nechanisms of the earth crust

earth science
how do the four subsystems of earth interact with one another

Earth Science
How energy flows through the Earth's system.

Earth Science
How energy flows through the Earth's system?

Earth and Space Science
which is closer to earth a moon or galaxy?

Science
On what sides does a "bulge" in the earth's oceans appear on the earth?

Earth Science
What is the atmosphere's role in the exchange of gases on Earth?

science
Amanda is holding a compass and notices that the north pole of the compass points toward the north pole of the Earth. She is confused because she knows from her science classes that the north poles of two magnets will repel each other. How can she explain this phenomenon? The ...

science
if a planet has four times the density of earth half the diameter will the gravity be stronger or weaker than earth

science
The seasons change BC A.the earth rotates slowly or B. The earth is tilted on its axis as it revolves around the sun

earth science
If the earth was made 4.5 billion years ago, how comes we don't have any craters or rocks from that time?

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

Hi, I need some information about Earth Quakes. My question is: Where & Why do Earth Quakes occur? I'm not cheating or anything I just need some help with this topic for the project I'm doing about Earth Quakes right now. Please Help ME! Thanks :D

science
a man has a mass of 80,0 kg is standing on the surface of the earth. a )calculate the magnitude of the attractive force (gravity) that the earth exerts on the man.(784n) b)how does your answer in a) compare to the magnitude of the force that the man exerts on earth? c)use your...

earth science
what is the greatest danger from volcanoes?? a. watery lava b. mud flows c. oxygen d. bulging of the earth's crust

science
Suppose a near earth asteroid of radius 50m strikes the earth surface.what could be the impact of such a collision?

Earth Science
Which of the following help create volcanoes? plate tectonics landslides cracks in Earth's crust built up magma

physical science
the attraction or pull of a person"s body toward the earth by the earth is called weight.the reaction to this force is the:

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