click below
click below
Normal Size Small Size show me how
s6-27 wk test Day 1
Science 6 27 week test
Question | Answer |
---|---|
What percentage of the Earth is freshwater? | 3% |
Where can the bulk of freshwater be found? | icecaps |
Land that is covered with water all or most of the year. | wetland |
Area of land that provides water for a river system | watershed |
a ridge of land that separates watersheds | divide |
smaller rivers that feed a big river | tributaries |
Name four major sources of water pollution | agriculture, industry, road runoff, human waste |
What percentage of the Earth's water is salt water? | 97% |
What causes local winds? | unequal heating of land and water |
What energy conversion occurs in a generator? | Mechanical converts to electrical |
What is the unit for length? | meter |
The amount of waves that pass a certain point is called... | frequency |
How can farmers reduce evaporation during irrigation? | Use pipes |
What is the formula for water? | H2O |
When plants make their own food it is called... | photosynthesis |
What celestial body produces its own light? | the sun |
What is the SI unit for mass? | gram (kilo-, mili-, etc) |
What absorbs UV rays? | ozone |
What is the freezing and boiling points of water in degrees celsius? | 0 degrees and 100 degrees |
What is a person that studies the weather? | meteorologists |
Dew is caused by... | condensation of water |
What are the three heat transfers? | conduction, convection, radiation |
Heat transfer by touch | conduction |
Heat transfer by the movement of fluids | convection |
heat transfer by electromagnetic waves | radiation |
What are the two most abundant gases in our atmosphere | Nitrogen and Oxygen |
What instrument measures air pressure? | barometer |
What instrument measures wind speed? | anemometer |