what is this process called? gas molecules liquid molecules
TRANSCRIPT
What is this process called?
Gas molecules
Liquid molecules
How much of Earth’s surface is covered by salt water?• 3/4
Distribution of Earth’s Water• Only three percent of Earth’s water is
fresh water.
- Water on Earth
Most of our freshwater is what form?
A puddle drying up on a sunny day is an example of what?
• Evaporation
Precipitation occurs when …
• solid or liquid water falls from clouds.
Clouds are an example of what process in the water cycle?
• condensation
• fresh water
What kind of water is cycled through the water cycle?
Most of earth’s freshwater is found in
• frozen icebergs and glaciers.
Section 1.2Fresh Water Flows and
Freezes on Earth
What is a divide?• A ridge, or
continuous line of high land, from which water flows in different directions
What is a drainage basin?• An area into which all of the water on
one side of a divide flows.
Gravity and the drainage basin is going to determine the way water flows on land.
• Where is the divide?
• Where is the drainage basin?
Where is the divide? Where is the drainage basin?
Surface water collects in
A. Clouds
B. Aquifers
C. Streams
D. Lakes
Name two differences between a pond and a lake
1. A lake is bigger than a pond2. Sunlight reaches the bottom of a
pond so that plants grow throughout the pond.
Lakes are larger, deeper & have little plant growth
Ponds are smaller, shallow, and have more plant growth
What time of the year is this?
Warm water
Cold water
During the summer, the warm surface water of a lake does not mix with the
cooler water underneath it. In the fall, though, this warm layer cools and sinks. This sinking is part of lake
_____________. • turnover
Eutrophication of a lake or pond can result from what?
• buildup of dead organisms. • pollution from phosphate detergents. • run-off of nitrogen fertilizers.
What is an iceberg?• A mass of ice floating in the ocean
Why does an iceberg float on water?•Because ice is less dense than water
A. Below the ground surface
B. Above the ocean surface
C. Below the ocean surface
D. None of the above
Most of the volume of an iceberg is
What is groundwater?
Video Clip
• How is water collected underground?
• Why are aquifers important?
Which of the following is not true of aquifers?
A. They filter and clean water.
B. Water flows quickly through them.
C. They provide a source of water for people.
D. They can be emptied.
Rate of water flow through an aquifer.
In an aquifer, water is stored in
A. an underground lake.
B. cracks and spaces between rocks.
C. an underground river.
D. wells and springs.
Granite does not allow water to flow through it. Granite is an example of
A. a spring.
B. impermeable rock.
C. an aquifer.
D. permeable rock.
What is an artesian well?• A well in which water flows to the surface
naturally because it is under pressure.
• It does not need to be pumped out.
Water exists in 3 states of matter on Earth!!!
- The Properties of Water
Changing State- The Properties of Water
One drop of water could contain many living bacteria
Lakes are homes for many fish, plants, frogs
2/3 of your body is water
Water carries nutrients that give you energy & flushes wastes away