Book #3 and #4 Flashcards
(28 cards)
What does emit mean and two things that emits light.
Creating light or to give off its own light. Suns, stars
What is the first layer of the atmosphere and one fact about it.
Troposphere-weather is formed here
What is the second layer of the atmosphere and one fact about it.
Stratosphere-ozone layer
What is the third layer of the atmosphere and one fact about it.
Mesosphere-coldest layer
What is the fourth layer of the atmosphere and one fact about it.
Thermosphere-hottest layer
What is the fifth layer of the atmosphere and one fact about it.
Ionosphere-northern lights are formed here
What is the last layer of the atmosphere and one fact about it.
Exosphere-satellites orbit here
What are three reasons why earth can support life?
Earth has:liquid water, breathable atmosphere and right distance from the sun (temperature)
What does reflect mean and two things that reflect light.
Reflet means: something that bounces light. Our moon and meteors.
Why is it harmful to look at the sun with the naked eye. What are two things to use to look at the sun safely.
Because the sun emits UV rays (ultraviolet) that will damage your eyes. Use a pinhole camera or a welders mask.
What positions do the Earth, the moon and the sun have to be in for a partial or total solar eclipse to occur.
Earth—moon—sun
Why does the sun appear to move across the sky each day?
Because earth is rotating on its axis.
What causes night and day?
Because earth is rotating on its axis.
What is the difference between direct and indirect rays from the sun? What causes the rays to become more or less direct?
Direct are stronger and head on and indirect is weaker and spread out. Because earth tilt on its axis.
When does the spring equinox occur?
March 21st
When does the fall equinox occur?
September 23rd
When does the summer solstice occur?
June 21st
When does the winter solstice occur?
December 21st
What happens to the amount of daylight on each of these dates?
On march 21st days are getting longer and on june 21st days are getting shorter.
What cases solstices and equinoxes.
Earth’s revolution around the sun.
What are the two reasons that earth experiences four different seasons each year?
Because the never-changing tilt of earths axis and earths revolution around the sun
When does the spring equinox occur?
March 21
When does the fall equinox occur?
September 23
When does the summer solstices occur?
June 21
