Stromatolites: World's Oldest Living Fossil

What form of life is a stromatolite?

• an insect

• a plant

• a dinosaur

• bacteria

Tags

NGSS.MS-LS4-2

Why is the strong current important to the stromatolites?

• The strong current prevents the formation of rocks.

• The strong current prevents the growth of algae.
• The strong current attracts predators to the stromatolites.
• The strong current provides nutrients and removes waste, essential for stromatolite growth.
• The strong current increases the temperature of the water.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-3

How old is the oldest known specimen of stromatolite?

• 3.5 billion years
• 1.5 billion years
• 4 billion years
• 2 billion years

Tags

NGSS.MS-LS4-1

Which of these has been around longer than stromatolites?

• Coral Reefs
• the Moon

• Protists

• Trees
• Dinosaurs

Why is sand important for stromatolites?

• It gives them color

• It protects them from seaweed and corals

• It provides food for them

• It helps them grow faster

How long did stromatolites dominate Earth?

• 20% of Earth's history

• 50% of Earth's history

• 80% of Earth's history

• 100% of Earth's history

What were landforms like when stromatolites appeared on Earth?

• The landforms were dominated by high mountain ranges.
• The landforms consisted of vast deserts with no water bodies.
• The landforms were primarily large continental landmasses with no seas.
• The landforms were primarily shallow seas with volcanic islands and no continents.

What gas do stromatolites release during photosynthesis?

• Hydrogen

• Nitrogen

• Oxygen

• Carbon dioxide

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NGSS.MS-LS1-6

What was the atmosphere like 3 billion years ago?

• Full of nitrogen

• Full of carbon dioxide and toxic gases

• Full of water vapor

• Full of oxygen