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s6-27 wk test Day 1

Science 6 27 week test

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
Created by: kbteach