please can anyone help me with these true or false questions..(5)?

Question

I know this is a lot to ask, but i am so stuck on these last 5. I did 95 of them and these are the last few. please i am in a rut here.

1. When studying the relationship between a crater's diameter and the speed of the asteroid when it impacts the surface, as the speed of the asteroid increases, the crater's diameter decreases. TRUE OR FALSE

2.The surface of the moon and Earth's surface have had the same amount of changes over time. TRUE OR FALSE

3.The gravity of Earth is six times that of the moon. TRUE OR FALSE

4.The difference between simple craters and complex craters is complex craters have a central peak or ring whereas simple craters do not have a central peak or ring. TRUE OR FALSE

5.Earth has about 14 times the cross sectional area of the moon, making it more likely to be hit by asteroids. TRUE OR FALSE

Again, thank you for anyone who can help me. i really appreciate it!!!!!!!!!

Answer 1

1: FALSE. Crater size is related to the mass of the bolide, and the velocity of impact. Crater diameter is proportional to the kinetic energy of the impact, and increasing either the mass or velocity will increase the kinetic energy and therefore INCREASE the size of the crater, NOT decrease it. Not sure why all the other answerers said "true" there. To take it to an extreme, dropping a 100 ton rock a few feet might make a slight dent in the ground, but a 100 ton meteor moving 20,000 mph is going to mess up your whole front yard if it hits it. The main difference is just the speed they are moving.

2. False. The surface of Earth is much more dynamic due to effects of tectonics and atmosphere.

3. True. Not exactly 6 times... gravity is much more complex than that, but close enough.

4. True. That is a basic part of the definition.

5. True. Bigger target to hit. Again, close enough to 14 times. Higher gravity would also make impact more likely. ( BTW, The atmosphere can break up asteroids into smaller parts, but unless it deflects them back out into space they still hit the solid surface of the Earth. Besides, our atmosphere is part of Earth, so technically it should be a hit anyway.)

Answer 2

1) True

2) True....mostly. You just can't see all of Earth's craters because of erosion and other geological processes and vegetation, neither of which are on the moon. During the solar systems formation, things were being pelted all over. However, once the atmosphere formed on Earth, smaller things burned up more easily.

3) True

4) True

5) Well if something is bigger, it makes a better target. But again remember the atmosphere burns up some projectiles.

Answer 3

T,F,T,?,F
I have no idea what simple and complex craters are.

Answer 4

1.true... it loses parts which is called "space dust"
2. false
3.i don't really know
4.true
5.false