SCIENCE WORLD WORK BOOK PRACTISE TEST

Question 1

water disappearing from a bowl left out in the sun is an example of what?

Answer 1

evaporation

Question 2

what is condensation

Answer 2

water changing state from vapour into liquid

Question 3

when water seeps into the soil and rocks it is called

Answer 3

groundwater

Question 4

what is grey water

Answer 4

water used n showers, baths, washing machines and laundry tubs

Question 5

oil is a non renewable resource because

Answer 5

once it is removed from the ground it cannot be replaced

Question 6

name three renewable energy resources

Answer 6

solo, wind, hydroelectricity and biomass

Question 7

what is an example of a non renewable energy source

Answer 7

coal

Question 8

what is geothermal energy

Answer 8

energy that is generated from heat stored in rocks

Question 9

electricity generated from the energy in falling water from dams is called

Answer 9

hydroelectricity

Question 10

nuclear energy is

Answer 10

non-renewable energy

Question 11

what are some living resources

Answer 11

animals, trees

Question 12

what are some non-living resources

Answer 12

oil, water air minerals and soil

Question 13

why are Minerals are non-renewable resources

Answer 13

because once they are mined they cannot be replaced

Question 14

What are some ways of reducing water use

Answer 14

1. grey water to water our gardens - this will reduce the amount of water used to keep gardens alive especially when there are water restrictions. The grey water will then return to the ground through the soil

Question 15

draw a flow chart that describes the steps in water purification

Answer 15

1. water from reservoir
2. add alum to water, this gets rid of materials
3. the materials settle to the bottom of the tank
4. filtration, removes and remaining materials
   5 chlorination, disinfects the water, removing any harmful bacteria

Question 16

what are the main problems in using fossil fuels as an energy resource

Answer 16

Burning fossil fuels produces green house gases such as CO2

1. we could instead reduce the amount of energy we use by turning off lights
2. insulating houses
3. increasing the amount of electricity coming from renewable resources such as solar and wind