p5 water cycles

Question 1

state the definition of melting

Answer 1

melting is a process that involves heat gain by a substance which changes from solid to liquid at a fixed temperature

Question 2

state the definition of freezing

Answer 2

freezing is a process that involves heat loss by a substance which changes from solid to liquid at a fixed temperature

Question 3

state the definition of boiling

Answer 3

boiling is a process that involves heat gain by a substance which changes from liquid to gas at a fixed temperature at a fixed temperature

Question 4

state the definition of evaporation

Answer 4

evaporation is a process that involves heat gain by a substance which changes from liquid to gas at any temperature between the melting point and boiling point

Question 5

state the definition of condensation

Answer 5

condensation is a process that involves heat loss by a substance which changes from gas to liquid at any temperature between the melting point and boiling point

Question 6

state the factors affecting the rate of evaporation of [liquid]

Answer 6

wind, exposed surface area of [liquid] and the temperature of [liquid] / surroundings

Question 7

state how wind affects the rate of evaporation [2 points]

Answer 7

1. with the presence of wind, the rate of evaporation of [liquid] increases
2. as the wind speed increases, the rate of evaporation of [liquid] increases

Question 8

state how the exposed surface area of [liquid] affects the rate of evaporation

Answer 8

as the exposed surface area of [liquid] increases, the rate of evaporation of water increases

Question 9

state how temperature affects the rate of evaporation [2 points]

Answer 9

1. as the temperature of [liquid] increases, the rate of evaporation of [liquid] increases
2. as the surrounding temperature increases, the rate of evaporation of [liquid] increases

Question 10

state 3 methods to conserving water

Answer 10

reduce, reuse and recycle

Question 11

state how to reduce / lower water usage to conserve water

Answer 11

use water efficient appliances

Question 12

state how to reduce / use water from one purpose to another purpose to conserve water

Answer 12

use water from clothes to flush the toilet

Question 13

state how to recycle / make changes to water so that it can be used for consumption to conserve water

Answer 13

desalination - removing all impurities