Question | Answer |
75 % of the Earth is covered with __________? | Water |
If the water on Earth was represented by 100 cups, how many cups would be salt water? | 97 Cups |
If the water on Earth was represented by 100 cups, how many cups would be fresh water that is not frozen? | 1 Cup |
If the water on Earth was represented by 100 cups, how many cups would be fresh water that is frozen? | 2 Cups |
Water is also called ________? | H2O |
Water is made up of ________ and ________. | Hydrogen and Oxygen |
All living things contain ________? | Water |
How much of your body is made up of water? | 2/3 |
_________ is a natural resource that all living things need to stay alive. | Water |
A healthy person can only survive ____ days without water? | 3 |
When water is heated it _________ and changes to a gas called ______________. | evaporates
water vapor |
When water vapor cools and changes back to a liquid it is called ___________. | condensation |
The ___________ is the path water takes as it evaporates into the air, condenses into clouds, and returns to Earth as precipitation. | water cycle |
Rain, snow, sleet, hail or examples of _______? | precipitation |
The process where salt water is changed to fresh water is called __________? | desalination |
When salt water evaporates only the ______ changes to vapor and the _______ is left behind. | water
salt |
Water supplies are in danger from water pollution. _________ is the worst pollutant. | sewage |
__________ is caused when chemicals combine with water vapor. This can kill plants and animals. | acid rain |