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
Name 2 properties of water.
Capillary action, surface tension, universal solvent, or specific heat.
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?
-So far so good?
-Precipitation.
-Answers vary.
200
What atoms can be found in water?
Hydrogen and oxygen.
200
What causes rain drops to form round beads when they fall onto a car windshield? Capillary Action or Surface Tension?
Surface Tension.
200
In which state do the molecule mov the slowest? And the fastest?
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 water made up of?
Atoms
300
The substance that does the dissolving is called__________.
Solvent.
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
Water that falls to earth as rain, snow, hail or sleet is called _____________.
Precipitation.
400
What makes water a polar substance?
The polar water molecules consisted in water.
400
What is responsible for water unusual properties?
The attraction among the polar water molecules is responsible for the water's unusual properties.
400
What is the only substance on Earth that commonly exist in 3 different states?
Water.
400
What's the percentage of fresh water in underground?
1/4 ; a quarter.
400
The process when the water is given off through the leaves as water vapor is called _____________.
Transpiration.
500
Is it true? The negative hydrogen ends with 1 water molecule attracts the positive oxygen ends of near by water molecules.
False. The positive hydrogen ends with 1 water molecule attracts the negative oxygen ends of near by water molecules.
500
- The amount of heat needed to increase the temperature of a certain mass of a substance by 1℃ is ___________.
- Why does water have a high specific heat?
- Specific heat.
- It is because strong attraction among water molecules.
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 human to use.
False.
500
-How does water cycle works?
-Do you think this game helps you to learn about water?