| 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. |