Geologic Time Lesson 3: Precambrian

Where did oxygen in Earth's atmosphere come from originally?

• from plants

• from cyanobacteria

• from rocks

• from animals

Which of the following was not present in early Earth?

• Carbon Dioxide

• Nitrogen Gas

• Oxygen

• Water Vapor

What HAPPENS during photosynthesis?

• The cells uses the energy in sunlight to make glucose

• The cell uses oxygen to make glucose.

• The cell uses glucose to make oxygen

• The cell uses the energy in sunlight to make carbon dioxide.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Scientist think the Earth is ___ years old.

• 4,500

• 45,000

• 4.5 million

• 4.6 billion

Are archaea multicellular or unicellular?

• Multicellular

• Unicellular

Tags

NGSS.MS-LS1-1

What is the type of extremophile that lives in very salty environments, such as the Great Salt Lake.

• halophile

• thermophile

• xerophile

• radiophile

an organism that has adapted to living in very high temperatures (heat), such as bacteria or algae

• psycrophile

• thermophile

• acidophile

• xerophile

What do you call an organism that thrives in acidic environments.

• acidophile

• endophile

• thermophile

• Alkaliphile

Organisms that can live in extreme environments are called:

• hooligans

• extremists

• extremophiles

• extremely rare

There are an abundance of fossils from precambrian time.

• True

• False