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Unit 3 Test

Authored by Brianna Burnett

Science

7th Grade

NGSS covered

Used 14+ times

Unit 3 Test
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24 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the definition of diffusion?

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

The process of a liquid turning into a gas.

The movement of water across a semipermeable membrane.

The process of a solid turning into a liquid.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Diffusion occurs ______ the concentration gradient (membrane), from high to low.

up

down

across

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is an everyday example of diffusion?

Air freshener spreading through a room

Water boiling

Ice melting

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

At equilibrium, the concentration of the substance is equal throughout the space. True or False?

True

False

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to perfume molecules when they are sprayed in a room?

They evaporate and spread throughout the room.

They remain in the bottle.

They change color.

They become solid.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Define osmosis.

Osmosis is the movement of water molecules through a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Osmosis is the process of active transport of ions across a membrane.

Osmosis is the diffusion of gases from a region of high pressure to low pressure.

Osmosis is the movement of solute particles from a region of high concentration to low concentration.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A semipermeable membrane allows some substances to pass through (usually water) but not others.

True

False

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