could be alone in the universe. The first reason Earth was able to become this welcoming blue sphere is because it's at just the right distance from the Sun, in a narrow zone not too hot and not too cold, where the temperatures are compatible with liquid water and life....
2What would happen if the gravity on Earth was suddenly turned off?Supposing we could magically turn off gravity(重力). Would buildings and other structures float away? What happened would depend on how strongly the things were attached(系)to the Earth. The Earth is moving at quite a speed...
Let's imagine that the Earth is flat. How would (B)1. What would happen if there was no atmosphere?everyday life work? Or would it work at all? A. There would be more water.We would have no atmosphere (大气层) B. Humans and most animals would die.With no gravity (重力), the ...
How can parts of Canada be "missing" gravity? What if there were no gravity on Earth? What's a zero-gravity massage chair? Top 5 Crazy Government Experiments More Great Links NASA: Responding to Mechanical Antigravity NASA: Reduced Gravity Research Program Sources Share: Citation More...
This variation is why your weight can change slightly if you travel from one location to another on Earth's surface. Gravity and Black Holes A black hole is a region of space where the gravitational pull is so strong that not even light can escape from it. The point of no return around...
A.there is less gravity on Earth B.there is less gravity on Mars C.there is more oxygen on Earth D.there is more oxygen on Mars 【5】The following facts are mentioned to compare Earth to Mars except . A.Length of Day B.Numbers of Moons C.Orbit around the sun D.Size of Earth and...
Supposingwecouldmagicallyturnoffgravity.Wouldbuildingsandotherstructures(筑物)floataway?WhathappenedwoulddependonhowstronglythethingswereattachedtotheEarth.TheEarthismovingatquiteaspeed,movingatoverathousandmilesperhour.Ifyouturnsomethingaroundyourheadonastring(细绳),itgoesaroundinacircleuntilyouletgoofthestring.Then...
Things will weigh less on the Moon than on the Earth. If you weighed 60 pounds on the Earth, you would weigh about10 pounds on the Moon! Since there is less gravity on the Moon,people can jump higher there. If you threw a ball on the Moon, it would fly very far.Some planets ...
I don't think we will have to do the housework because ___(机器人)can help us a lot.___(那么)we will spend more time ___(阅读)books on computers. If we like, we will only need to ___(倾听)to them because the computers can read the books for us. A new ___...
The earth is moving at quite a speed moving at over a thousand miles per hour. If you turn something around your head on a string it goes around in a circle until you let go of the string. Then it flies off in a straight line. ‘Turning off’ gravity would be like letting go of...