Science A study Guide Flashcards
What is the role of the atmosphere?
Keeps temperatures Safe
protects Organisms form harmful rays such as UV
protects earth from Asteroids
What effect can UV rays have on humans?
Sunburn
Cancer
What type of radiation from the sun gives heat to the Earth?
Infrared Radiation
What features of the atmosphere are necessary for life on Earth?
Protects life from harmful radiation from the sun
help keep Earths temperatures safe for life
contain enough oxygen for living organisms to breathe
Provide a way for the water cycle to work
What are the 4 properties of air?
Air is fluid, meaning it can flow from one place to another
Air will fill whatever space it is in
Air expands when heated and contacts when cooled
Warm air rises and cool air sinks
What scientific tool is used to measure atmospheric pressure?
Barometer
What are the steps in the water cycle?
Evaporation
Condesation
Precipitation
Accumulation
Repeat
What is the breakdown of presents of water on Earth?
97% saltwater
3% fresh water ice river lates etc.
About 0.3 % of fresh water is avabile for drinking, farming, cooking etc.
What are the names and jobs of Earth’s global winds?
Doldrums- warm, still air that is near the equator
Trade Winds- Steady, predictable winds trade ships used for travel
Jet stream- fast, hing winds airplanes use for travel
In what direction do storm rotate?
Northern Hemisphere- counter clockwise
Southern hemisphere- clockwise
In what directions do hot and cold air move and which is more/less dense
Hot air - less dense, moves up
Cold air - more dense sinks
How do winds form?
When air flows over a warm surface, it heats up and rises. This leaves room for cooler air to flow in. The flowing air is wind.
What is the global water crisis and why should we care about it?
The global water crisis is that billions of people lack clean water that they need for important uses. We should care for the crisis because God made the people who are going through this and he calls us to help them. We can help by not wasting as much water and buliding wells over by the people with lack of water.
How does heat move? (Use the key words conduction convection and radiation )
Conduction: Heat transfers into your hands as you hold a hot cup of coffee. Convection: Heat transfers as the barista “steams” cold milk to make hot cocoa. Radiation: Reheating a cold cup of coffee in a microwave oven.
Why doesn’t, all of the sun’s energy reach the Earth and cause it to overheat?
God made it so that the ozone layer high in Earth’s atmosphere absorbs a lot of this UV radiation and blocks it from reaching Earth’s surface.
