Science Ch7 Consepts
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
卡片预览 (24 张)
What are some bodies of water and what do they give us?
Oceans rivers and lakes away to travel, places to catch food, and beautiful sites to visit.
What is the hydrosphere
All the waters of the earth.
How much of the earth is covered by the hydrosphere
70 to 75% of the earth
What are the oceans largest to smallest
P A I S A Pacific (also the deepest) Atlantic, Indian, Southern, Arctic
Where do oceans get their salt and how does it get there
Oceans get salt from rivers, the rivers dissolved salts from the rocks and soil and carry it to the ocean. When water evaporates from the ocean it concentrates the salt that’s dissolved in the ocean water.
Give an example of low salinity locations and an example of high salinity locations.
Low salinity - where rivers run into the ocean. High salinity - warm places
What affects ocean temperatures
Location and ocean currents
What resources do we get from the ocean, Ocean resources
Salt used for food and magnesium and drinking water
Almost all the freshwater on earth starts as what and where can it go?
It starts as rain or snow (precipitation) and it can sink into the ground, collect in rivers and lakes, and sometimes freeze in ice sheets and glaciers.
What is groundwater?
It is precipitation that soaks into the ground.
What happens to water when it goes underground?
The water fills spaces between particles of soil and rock and the water keeps sinking until it reaches a layer of rock or clay that it can’t move through.
What are examples of what a water table could do?
It could change throughout the year, it Will rise when water is added by rain or melting snow, it will lower when there is a drought or if people use ground water faster than it can be replaced, not leveled; it usually follows a slope of the land, and a lake, Stream, or swamp is where the water table meets the surface.
Where is water from precipitation and melting snow go?
It goes downhill into small streams sometimes small streams join to form larger streams and rivers
What else can seep into rivers and where do the rivers mostly eventually flow into?
Ground water can easily sleep into rivers and rivers can flow directly into ocean
The area where water drains into a river is called?
The rivers wash shed.
How can lakes form and how can water from the lake leave?
 Lakes form when water collects in a low spot and water from LA can leave by flowing into a river, seeping into the ground, or evaporated into the air.
How much freshwater is frozen in the ice and where is it mainly in?
7/10 of earths freshwater is frozen into ice, mainly in Greenland Antarctica, and the ice cap at the north pole floats on the ocean, there is no land under it.
Give examples of freshwater frozen ice and describe it.
Glaciers and ice sheets form when each year snowfall is greater than the amount that melts, icebergs are large pieces of ice that break off from glaciers and sheets float in the ocean, and when ocean water freezes, The ice is not salty
What causes the ice to be more salty?
The salt is pushed out of the crystal as a form causing the water around the new ice to be more salty.
In the United States, where do we get our drinking water and why do we have to treat the water before we use it?
We get our water from ground water or surface waters. This can contain harmful pollution from runoff, from farms, parking lots, or lawns.
What are the steps of the water treatment.
First the water is pumped into plant. Secondly, screens filter out large objects. Thirdly, chemicals are added that stick to dirt particles making them heavy enough to sync. Then water flows through sand to filter out smaller particles. After, more chemicals are added. Lastly water is pumped through pipes to home and businesses in the community.
What type of chemicals are added at the end of the water treatment?
Small amount of chlorine are added to kill harmful bacteria and small amounts of fluoride are added to help you teeth resist decay.
What are the ways to keep from wasting water?
Do not run showers or Fossett longer than needed, water plants in the evening so less water will evaporate, and fix stripping faucets.
What are the phases of water?
Solid - glacier, ice sheets, Icebirds Liquid - oceans, rivers, lakes, streams, and ponds Gas - water vapor in the air