Chpt. 3 review Matter, Diffusion, Osmosis,Active Transport

Front

What are the basic units of living things?

Back

Cells

Front

What is true about active transport?

Back

It requires energy.

Front

Where are electrons found in an atom?

Back

Orbiting the nucleus.

Front

Where is the proton found in an atom?

Back

In the nucleus.

Front

Which particle has a positive charge?

Back

Proton.

Front

What is diffusion?

Back

The movement of particles from an area of high concentration to an area of low concentration.

Front

What is osmosis?

Back

The diffusion of water across a selectively permeable membrane.

Front

What is active transport?

Back

The movement of substances against their concentration gradient, requiring energy.

Front

What is a neutron?

Back

A particle in the nucleus of an atom that has no charge.

Front

What is a molecule?

Back

Two or more atoms bonded together.