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-LS4-1

Iron oxide is also known as rust?

• true

• false

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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

NGSS.MS-LS1-2

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

A system is a set of (a)____________parts that work (b)___________

• (a) non interacting

  (b) together

• (a) interacting

  (b) together

• (a) non interacting

  (b) independently

• (a) interacting

  (b) independently

Tags

NGSS.MS-LS1-3

NGSS.MS-LS2-3

Another word for an engineered system is ____________system

• natural

• designed

• undersigned

• planned

Grouping parts in systems allows us to study how (a)_________, (b)__________and flow in natural or designed systems

• (a) matter

  (b) energy

• (a) air

  (b) science

• (a) objects

  (b) heat

• (a) matter

  (b) electrons

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-4

NGSS.MS-LS2-3