Geological Mysteries: The Formation of Earth

What natural processes often erase early geological evidence on Earth?

• Continental drift and erosion

• Glacial movements

• Meteor impacts only

• Volcanic eruptions only

What was a significant discovery made by geologists about meteorites?

• They are younger than Earth's rocks

• They contain only iron

• They are the same age as the moon

• They are older than any rocks on Earth

What experiment aboard the International Space Station supported the formation of planetary bodies?

• Shaking salt in zero gravity

• Collision of mineral grains

• Mixing of liquid elements

• Temperature variations in space

What caused the Earth to transform into a planet with distinct layers?

• Impact with another planet

• Rapid cooling of the surface

• Melting due to radioactive elements

• Continuous volcanic activity

How did Earth's initial crust form?

• From solidifying lava

• From debris of meteorites

• From cooling of the molten surface

• From accumulation of dust particles

What evidence suggests that Earth had oceans over 4 billion years ago?

• High atmospheric moisture

• Discovery of marine fossils

• Presence of amphibolites

• Chemical signatures in rocks

What are amphibolites?

• Oceanic sediments

• Altered volcanic rocks

• Continental crust materials

• A type of meteorite

What did the oldest rocks in Canada reveal about Earth's past?

• It had a thick atmosphere

• It had a solid crust and oceans

• It was entirely molten

• It lacked any form of water