Choose the correct word from the list above to fill in each blank. |
Plants take water from the soil by the . |
A hydro-electric power station does not cause . |
Animals such as cows provide us with which is good for farming. |
Oil and petrol on water. |
Pure water is colourless, odourless and . |
is obtained from sheep. |
energy of the voice is transformed into electrical energy in a telephone. |
A natural source of heat energy and light energy is the . |
Milk teeth are replaced by teeth. |