What are the three reasons water is important to life?
Biological functions, it warms the Earth, and it helps keep Earth's temperature stable.
100
What percentage of water is in our body?
60%
100
What are the 3 states of water?
Solid, liquid, and gas.
100
What is the percentage of salt water on Earth?
97%
100
In which step of the water cycle does water return to earth surface?
Precipitation.
200
What is the effect that helps warm Earth by trapping thermal energy in the atmosphere?
The Greenhouse Effect
200
Thermal energy always moves from an object with a _________ temperature to an object with a __________ temperature.
Higher to lower
200
In which state do the molecules move the slowest? And the fastest? (Think thermal energy)
Slowest: solid
Fastest: gas
200
Water that fills the cracks and spaces in underground soil and rock layers is called ______________.
Ground Water.
200
What 3 major steps make up the water cycle?
Water evaporates, condensation forms clouds, water fall as precipitation.
300
What is specific heat?
Specific heat is the amount of thermal energy needed to raise the temperature of 1kg of material 1 degree C.
300
List three ways in which water is necessary for the life processes of organisms.
Transport in the cells, photosynthesis, and regulation of body temperature.
300
The process by which a gas changes to a liquid is called _________.
Condensation.
300
True or False.
Far more fresh water is found in lakes and rivers than underground water.
False.
300
What two factors drive the water cycle?
The sun and gravity.
400
What process is water necessary for in plants?
Photosynthesis
400
Sing the chorus of the Water Cycle Rap
"I rise from the sky to the sea below, then down to the ground as rain or snow. I keep it moving moving cos' I'm the water cycle, moving moving cos' I'm the water cycle.
400
What is evaporation in plants called?
Transpiration
400
What makes up the hydrosphere? (3 answers)
The atmosphere, freshwater, and oceans.
400
Where is most of Earth's freshwater stored?
Glaciers
500
What does water do for our bodies? (2 answers)
It helps carry waste away from cells and nutrients throughout the body. It also helps regulate our temperature.
500
Explain the role water plays in stabilizing Earth's temperature.
Ocean currents carry thermal energy. Water has a high specific heat so it heats and cools slowly.
500
1. Water moves between the liquid and gaseous states by ___________and____________.
2. Water moves between the liquid and solid states by ___________and____________.
1. Evaporation and condensation.
2. Freezing and melting.
500
True or False.
The 3 percent of Earth's fresh water is available for humans to use.
False.
500
How do clouds form?
What happens when the clouds can not hold any more water?
Water vapor condenses around dust particles to form droplets, which combine to form clouds.
Precipitation