movement of molecules

Question 1

definition of diffusion

Answer 1

net movement of molecules from an area of high concentration to an area of low concentration

Question 2

definition of osmosis

Answer 2

the net movement of water molecules from an area of high water potential to an area of low water potential through a partially permeable membrane

Question 3

definition of active transport

Answer 3

movement of molecules from an area of low concentration to an area of high concentration across a partially permeable membrane, using energy from respiration (active process)

Question 4

describe 4 factors that affect the rate of diffusion

Answer 4

• temperature
• surface area
• distance
• concentration gradient