4. Fresh water Lakes and rivers are not salt water. they you can find them any were a they can be a puddle they can be in a lake or even in the gutters.
5. Salt water Salt water is in the ocean like when you go to the beach there is salt at the beach. In the polar reigns there are not salt water but when you get to the equator there is a loot of salt.
6. Currents and tides The moons gravity pull witch pulls the water and forth so that makes tides and waves.
7. How to humans effect People also use water to drink but we waste a lot of water because we use it wash are cars and to take a bath we use a lot of water like 500 gallons when we brush teeth
8. References I got this info from the text book and from Google images and also from the inter net.