| A | B |
|---|
| Approximately, what percentage of earth's water is fresh water? | 3% |
| As water moves slowly through a wetland, some waste materials settle out, some wastes are absorbed by plants, and silt in mud is tracked by plants' roots. In this way, wetlands act as natural........ | filters |
| Water that falls to earth as rain, snow, silt, or hail is called? | percipitation |
| Which of all of the following best describes the Florida Everglades? | A fresh water marsh. |
| The total amount of water on earth.......... | fairly constant. |
| A lake that stores water for human used is called a........... | reservoir. |
| All of the following human activities threatens the Everglades EXCEPT.......... | preservation |
| People can obtain ground water by drilling a well....... | into a "aquifer". |
| An "aquifer" is a............. | underground layer of rock or sediment that holds water. |
| A well in which ground water rises is called a........... | "artesian well". |
| Using less water is one way to practice water........ | conservation. |
| Why might chlorine be added to drinking water? | Chlotine kills diseasde causing microorganisms. |
| The land that supplies water to a river system is a......... | watershed. |
| Most of earth's water is in the form of....... | ice. |
| A river and all its tributaries make up a....... | "riversystem". |
| A ridge of land that seperates two(2) "riversheds" is called a....... | "divide". |
| An area of land that is covered with a shell layer of water during some all of the year, is called a....... | wetland. |
| Wetlands help prevent _______ by absorbing runoff from heavy rains. | flooding |
| Some people obtain their water from underground layers of rock or sediment called....... | "aquifer". |
| The _______ of water is a measurement of how acidic it is, on a scale of 0 to 14 | PH |
| The level of two(2) minerals-calcium and magnesium-in water is referred to as....... | "hardness". |
| What is the step called in which a liquid passes into a gas? | evaporation |
| How does water enter into the ground? | From "saturated" and "unsaturated" zones |
| Describe two(2) different paths that a rain drop falling in the mountains might take to reach the ocean? | percipitation and surface runoff |
| Identify the step in which water returns to earth's surface from the atmosphere? | perecipitaition. |
| Identify the step in which droplets of water come together around tiny dust nparticles in the air? | condensation |
| Where does underground water come from? | Underground water comes from water in rivers, lakes, and glaciers-also, it comes from percipitation. |
| What determines how easily water moves through rock and soil? | The sized spaces or pores determines how easily water moves through rock and soil. |
| Why do sand and gravel allow water to passthrough? | Sand and gravel allow water to pass through by the pores are connected-this too effects water movement. |
| What happens if water reaches an impermeable layer? | Once water reaches an impermeable layer it is trapped. |
| If you live far from a city, town, or a body of fresh water how can you reach ground water to use it for your daily needs? | If you live far from a city, town, or body of fresh water, you would reach ground water to use for your daily needs, the "water table". |
| Is ground water a large, still pool beneath earth's surface? | Groundwater is a large, slow moving pool beneath the earth's surface. |
| How can people obtain groundwater from an "aquifer"? | People obtain "groundwater" from an "aquifer" by drilling a well below the water table. |
| How did people dig wells long ago? | People long ago dug wells up by hand. |
| How are wells dug up today? | Well are dug up today by "well drilling equipment". |
| What happens if too much water is pumped out too fast from a "aquifer"? | If too much water is pumped out too fast from an "aquifer", a well may run dry. |
| If you can not get water out of an "aquifer", what can you do? | If you can not get water out of an "aquifer", the owner(s) of the well will have to dig deeper. |
| Do you need to use a pump for an "artisian well"? | No, you do not need to use a pump for an "artisian well", pressure does the job. |
| What are "springs"? | Srings can form as groundwater bubbles or flow out of the "cracks" in the ground. |
| Where does the word "geyser" come from and what does it mean? | The word "geyer" comes from ice landic word "geysir" which means "gusher". |
| How does a "geyser" form? | A "geyser" forms when very hot water that has been circulating deep underground begins to raise through narrow passages in the rock. Heated gases and bubbles of steam are forced up these passges by the pressure of the hot water boing below. |
