The mussel uses it's _______ to filter oxygen and food from the water.

• Gills

• Shell

• foot

The center of the atom is called

• Nucleus

• Negative

• Molecule

Tags

NGSS.MS-PS1-1

"a" on the diagram is the

• Electron

• Nucleus

• Compound

Tags

NGSS.MS-PS1-1

Particle with a positive charge (+)

• Proton

• Neutron

• Mixture

Tags

NGSS.MS-PS1-1

Which is true of electrons

• Electrons have a negative charge

• Electrons orbit the nucleus

• Electrons are very small

• All of these are true of electrons

Tags

NGSS.MS-PS1-1

2 or more elements chemically combined is called...

• Compound

• Mixture

• Chemical formula

Tags

NGSS.MS-PS1-1

Water (H₂O) is an example of a .....

• Compound

• element

• atom

Tags

NGSS.MS-PS1-1

Water particles are attracted because of

• pollution

• equal charges

• opposite charges

Tags

NGSS.MS-PS2-3

The hard, outside part of the mussel is called

• Foot

• land

• Shell

Why are mussels important to the Anacostia River?

(more than 1 correct answer)

• Mussels clean the river

• There are many mussels in the river.

• Birds and Animals eat mussels

• Mussels grow a shell

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4