History of our Planet

Earth's system that has to do with water, rain, snow, rivers and oceans.

• Atmosphere

• Hydrosphere

• Biosphere

• Geosphere

Earth's system that has to do with gases around the Earth.

• Atmosphere

• Hydrosphere

• Biosphere

• Geosphere

Earth's system that has to do with rocks, Earth’s crust and mantle.

• Atmosphere

• Hydrosphere

• Biosphere

• Geosphere

Earth's system that has to do with living organisms: plants, animals and humans.

• Atmosphere

• Hydrosphere

• Biosphere

• Geosphere

Earth's atmosphere is made up mostly of ______________?

• Oxygen

• Nitrogen

• Helium

• Iron

A celestial cloud of dust and gas is called . . .

• nebula
• supernova
• accretion disc
• bombardment

How old is our solar system?

• 4.6 billion years
• 13.8 billion years
• 6,000 years
• 15,000 years

What is the geological time scale ?

• A clock

• A calendar

• Something that divides Earths history into groups

Jellyfish are one of the oldest species on Earth. In what time period did they first appear?

• Precambrian Time

• Paleozoic Era

• Mesozoic Era

• Cenozoic Era

What division of time was the longest ?

• Paleozoic

• Mesozoic

• Cenozoic

• Precambrian