1. It is a storm with thunder and lightning and usually a heavy rain. - thunderstorm
2. It is a sudden flash of light in the sky during a storm. - lightning
3. It shows how hot or cold a body or a place is. - temperature
4. It is a long period when there is little or no rain. - drought
5. It always appears directly opposite the sun in the sky. - moon
6. It is a large pile of snow formed by wind. - snowdrift
7. It is a large amount of water overflowing an area that is usually dry. - flood
8. It is a unit of temperature shown by the symbol after a number. - Celsius