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- 1. Multiple Choice
Why do scientists look at meteorites for clues on the age of the Earth? Choose more than one right answer.
Meteorites have been floating unchanged in space since the solar system was formed.
Because meteorites have growth rings just like trees do.
Because meteorites are made of nickel and iron just like the center of the Earth.
The Earth has been constantly changing since it first started to form, so there are no original rocks from the time it was born.
- 2. Multiple Choice
The Earth started to form when dust particles
formed a ball of melted rock.
clumped together with static electric charges.
froze in the solar heat of the sun.
caused the sun to have solar allergies.
- 3. Multiple Choice
As dust particles formed rocks and those rocks started to slam together, the young Earth started to have its own _____________ field, pulling even more rocks into itself.
radiation
rock
gravity
corn
- 4. Multiple Choice
We can tell that the Earth was once molten because the Earth now has _____________________________________.
layers divided into a crust, a mantle, and a liquid and solid core.
oceans and deserts.
an atmosphere.
life.
- 5. Multiple Choice
The Earth is just about
old as your teacher.
4.5 million years old.
as old as the dinosaurs.
4.56 billion years old
- 6. Multiple Choice
The moon was formed _____________________.
as a rotating mass of gas and dust started to gather together.
when a nearby asteroid was trapped by the Earth's gravity field.
when a small planet collided with the earth right about when the crust started to form.
by a gigantic volcanic explosion that sent a huge amount of lava into space.
- 7. Multiple Choice
The oceans were formed early in the life of the earth. They formed about __________________________.
26 million years ago.
200,000 years ago.
4.3 billion years ago.
the same time that the dinosaurs walked the Earth.
- 8. Multiple Choice
Where did the ocean water come from?
Volcanoes spitting out steam and poisonous gasses.
Rain clouds.
Rivers.
Outer space. The water was trapped inside meteorites.
- 9. Multiple Choice
Where did the building blocks of life come from?
Scientists found that meteorites also contained amino acids, which are the building blocks of life.
Pools of hot bubbly sludge.
Lightning strikes changed mud into amino acids.
Volcanoes modified some of the rock in the Earth so that amino acids could form.
- 10. Multiple Choice
The atmosphere of the early Earth was poisonous to life the way we know it now. If that was the case, where did the oxygen in our atmosphere come from?
Everyone knows oxygen comes from trees!!
Oxygen formed as a by-product of cyanobacteria which lived 3.5 billion years ago in formations called stromatolites.
Oxygen is a by-product of volcanic activity.
Oxygen came from meteorites.
- 11. Multiple Choice
If you could travel back in time to the Earth when it was 1 billion years old, what would you need to survive the atmosphere.
You would need a protective suit and oxygen tank, so that you could survive the poisonous atmosphere.
You would not need anything special. By then there was plenty of oxygen to breathe. You would just need an insulated suit to protect you from volcanoes.
You would need a submarine because the Earth was all ocean.
You would need a friend there because no one would believe you when you said you traveled 3.5 billion years back in time.
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