Description : Suggest a good place to establish a wind farm.
Last Answer : Ans: b) A good place to establish a wind farm would be a windy location on land or out at sea.
Description : What is the wind farm?
Last Answer : Ans: a) A wind farm has a large number of wind turbines in one place.
Description : What is the main problem with wind power?
Last Answer : Ans: The energy produced by wind is difficult to store, and electricity is only produced when the turbines are rotating.
Description : Give two examples of renewable energy sources.
Last Answer : b) The Sun, wind, and tides.
Description : What is a renewable energy source?
Last Answer : Ans: a) A renewable energy source is a natural energy source which can supply energy for millions of years without becoming exhausted.
Description : Explain how global warming can lead to the flooding of low lying areas.
Last Answer : Global warming will cause the ice caps at the Poles to melt which in turn will cause the sea level to rise, thus causing a change in weather patterns: more flooding will occur in the lowlying parts of the world.
Description : What is a global warming?
Last Answer : Ans: a) An increase in the amount of carbon dioxide in the air is increasing the greenhouse effect, which is causing the temperature of the Earth to rise. This is global warming.
Description : Name one other green house gas.
Last Answer : methane
Description : Explain why carbon dioxide is called a green house gas.
Last Answer : Ans: a) Similar to a greenhouse, carbon dioxide is very good at keeping heat within the Earth’s atmosphere. This is why it is called a greenhouse gas. It has been very useful in making the Earth warm enough for human life to survive.
Description : What happen to the heat energy that reaches Earth from the sun?
Last Answer : Ans: The layer of air which surrounds the Earth acts as an insulating layer. Carbon dioxide gas in the atmosphere absorbs the heat from the Sun and keeps it in thereby maintaining a specific temperature for life on Earth.
Description : Name three gases that cause rain to be acidic.
Last Answer : Ans: carbon dioxide, sulphur dioxide, nitrogen dioxide
Description : Explain how fossil fuel cause air pollution.
Last Answer : Ans: When fossil fuels are burnt they produce harmful substances that cause air pollution and, in turn harm the environment.
Description : Why are gases deposits found on top of oil deposit?
Last Answer : Ans: Gas deposits collect above the oil because they are less dense.
Description : What does porous mean?
Last Answer : Ans: Porous means something having sponge-like holes through which liquid or gas can seep.
Description : a) What does crude oil look like? b) Explain why crude oil is a fossil fuel.
Last Answer : a) Crude oil is thick and black. b) Crude oil is a fossil fuel because it was made from the dead bodies of microscopic plants and animals that once lived in the sea.
Description : Suggest why there are no human fossil in coal.
Last Answer : Ans: There were no human beings living on the Earth at that time.
Description : What is a fossil fuel?
Last Answer : Ans: A fossil fuel is formed from the remains of living things. Coal, oil, and natural gas are fossil fuels.
Description : Give three uses for oil products.
Last Answer : Ans: Oil products are used in vehicles, for heating homes and in power stations.
Description : List five common fuels that could be used in the home
Last Answer : Ans: coal, natural gas, kerosene oil, wood, charcoal
Description : Give the meaning of the following words a) combustion b) ignition
Last Answer : a) The chemical reaction which takes place when a fuel reacts with oxygen to give out thermal energy (heat) is called combustion. b) The small amount of energy needed to light a fuel is called ignition.
Description : Where most of the world’s energy does comes from?
Last Answer : Ans: Most of the world’s energy comes from burning fuels.