What is rust formed by?

• water, iron, and oxygen

• carbon dioxide, water, and oxygen

• water, oxygen, and bacteria

Tags

NGSS.MS-PS1-5

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

• true

• false

Tags

NGSS.MS-ESS1-4

The oxygen that entered Earth's atmosphere was produced by

• clouds

• plants

• cyanobacteria

Tags

NGSS.MS-LS1-6

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-ESS1-4

NGSS.MS-ESS2-2

Iron oxide is also known as rust?

• true

• false

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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

• Anaerobes

• aerobes

a microorganism that grows in the presence of air or requires oxygen for growth.

• anaerobes

• aerobes

Single-celled organisms without a nucleus are called a

• prokaryote

• eukaryote

Tags

NGSS.MS-LS1-1

an organism consisting of a cell or cells in which the genetic material is DNA in the form of chromosomes contained within a distinct nucleus.

• prokaryote

• eukaryote

Oxidation is the process where a substance combines with oxygen.

• true

• false