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• Aluminium is extracted from the ore by an electrical process.
• Metal is extracted from the ore by using heat
• A container that comes the mixture of crushed materials into the top of the furnace is a skip.
• The liquid iron is heavier than the slag.
• The large moulds are known as pigs.
• A large bridge was built across the river. The purpose was to provide a way across the river.
• The house in Upscale was built with a large amount of insulation. The purpose was to keep the cold out and the warmth in.
• Water will be pumped down into the rocks. The purpose is to create geothermal energy.
• Now, many countries are educating people about the high cost of energy. The purpose is to make its people aware of the cost of energy and the importance of not wasting it.
• The earth on which we live was in the gas state.
• The earth's crust is the hard surface of the earth.
• There is a mass of molten material inside the earth.
• Volcanoes remind people all the time the force and heat below the ground.
• An earthquake is a sudden movement of the earth's surface.
• Mariners used to forecast the weather by studying the sky.
• The author says that the science of meteorology is not still infallible.
• Weather forecasting will never be infallible.
• The earth's rotation causes winds.
• Atmospheric pressure is an indicator of the weather.
• The earth passes through warming and cooling cycles.
• place form which something comes = source
• a place where energy is produced by using atomic power = nuclear power station
• when something is used that is finished, but can be replaced = renewable
• to do with hot water form the earth = geothermal
• connected with the house = household
• a strange imaginary animal = monster
• saving or using something well without wasting it = conservation
• without waste = efficiently
• having knowledge or realization = aware
• covering with non-conducting materials = insulation
• When thermoplastics are heated, they soften.
• If a gas is compressed, it heats up.
• Refrigeration preserves food by lowering its temperature.
• A heater raises the temperature of the water.
• The rising piston compresses the fuel mixture.
• Designers try to reduce the weight of a structure.
• When the push button is released , the valve spring pushes up the spool.
• Pumping fluid into the main cylinder gradually raises the jack.
• Aerodynamic design reduce wind resistance.
• The motor starts up slowly, then gradually increases speed.