Movement of Substances

Question 1

What is diffusion?

Answer 1

Diffusion is the net movement of particles from an area of high concentration to an area of low concentration.

Question 2

What is osmosis?

Answer 2

Osmosis is the movement of water molecules from an area of low water potential to an area of high water potential across a semi-permeable membrane.

Question 3

What is active transport?

Answer 3

Active transport is the movement of substances against a concentration gradient, requiring energy.

Question 4

How does surface area to volume ratio affect the rate of movement of substances?

Answer 4

A higher surface area to volume ratio increases the rate of movement of substances.

Question 5

How does temperature affect the rate of movement of substances?

Answer 5

Higher temperatures increase the rate of movement of substances.

Question 6

How does concentration gradient affect the rate of movement of substances?

Answer 6

A steeper concentration gradient increases the rate of movement of substances.