#3#4 Flashcards
What are the names of the earths atmosphere?
Troposphere Stratosphere Mesosphere Thermosphere Ionosphere Exosphere
What is one fact about each layer?
Troposphere-weather is formed here
Stratosphere- ozone layer and jet stream
Mesosphere- protection from meters and the coldest layer
Thermosphere- hottest layer, widest layer, least amount of air molecules
Ionosphere- electrically charged ions, northern lights are formed here
Exosphere- satellites orbit, its the last layer
What are three reasons why our planet earth is the only planet in our solar system that supports human life?
- Liquid water
- breathable atmosphere
- right distance from the sun (temperature)
What do the words emit and reflect mean?
emit- creates its own light
reflect- light bounces off of it
What objects in space emit light?
sun and stars
What objects in space reflect light?
the moon, meteors, and planets and comets
Why is it harmful to look at the sun with your naked eye?
because the sun makes uv rays which are harmful to look at
What are two safe methods for viewing the sun?
a welders mask and a pinhole camera
Why does the sun appear to move across the sky?
because the is making a rotation around the sun
What causes day and night?
the earths rotation around the sun
what is the difference between indirect rays and direct rays?
indirect are slanted and weak and colder rays and direct rays are head on and strong and warm rays
what causes rays to be more or less indirect
the earths revolution around the sun
what are two reasons the earth has four seasons
the earths unchanging axis and the earths revolution around the sun
when do the spring and fall equinoxes occur
march 21 and september 21
when do the summer and winter solstices occur
june 21 and december 21
