Atmos-Bio

Which gas is most abundant in the atmosphere? (click to enlarge picture)

• oxygen

• nitrogen

• water vapor

• argon

What protects life on earth from harmful UV radiation?

• Ionopshere
• Stratosphere
• Ozone Layer
• Auroras

How much of the atmosphere is composed of nitrogen gas?

• 87%
• 38%
• 78%
• 21%

Living things that are too small to be seen are called_____.

• organisms
• atoms
• microorganisms
• molecules

Tags

NGSS.MS-LS1-1

What kind of organism was doing photosynthesis before plants?

• Cyanobacteria

• Algae

• Seaweed

• Insects

Tags

NGSS.MS-LS1-6

an organism that grows without air, or requires oxygen-free conditions to live.

• Anaerobes

• aerobes

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-3

Stromatolites are piles of cyanobacteria that have been secreting a lime substance and hardening over time so that they resemble rocks?

• true

• false

Tags

NGSS.MS-ESS2-2

The oxygen that entered Earth's atmosphere was produced by

• clouds

• trees

• cyanobacteria

• chemical

Rocks containing layers of iron oxide formed before oxygen was released into the atmosphere by living things.

• true

• false

Tags

NGSS.MS-ESS1-4

What is rust formed by?

• water, iron, and oxygen

• carbon dioxide, water, and oxygen

• water, oxygen, and bacteria