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- 1. Multiple Choice
The air is mainly made up of ........
nitrogen
oxygen
carbon dioxide
- 2. Multiple Choice
Earth is currently 150 million km away from the Sun. If Earth was 200 million km away from the Sun, it would no longer support life because -the surface water would evaporate.the temperature would be too cold.the oxygen would leave the atmosphere.there would be less exposure to solar wind. - 3. Multiple ChoiceThe magnetic field of Earth protects life against -falling meteors from outer space.high energy particles from the Sun.ultraviolet radiation from the stars.debris ejected from the Moon.
- 4. Multiple ChoiceThe layer of ozone in the upper atmosphere of Earth is important to life because it shields Earth from -impacts from meteors.solar winds.
solar winds.ultraviolet radiation.changes in temperature. - 5. Multiple ChoiceWhich of the following characteristics of the planet, Earth, is essential to the survival of every living organism?Earth has abundant available water.Earth has just one orbiting moon.Earth orbits the Sun once every 365 days.Earth rotates on its axis once every 24 hours.
- 6. Multiple ChoiceWhat is the habitable zone?A zone with the correct distance away from a starA zone in space where water turns into vaporA zone where life can not be sustainedA zone in space where water is frozen
- 7. Multiple ChoiceHow are the gases in Earth's atmosphere like a blanket?They hold in heat and keep temperatures stableThey are colorful and softThey hold Earth's water and prevent it from escapingThey sometimes wrinkle and fold to cause tornadoes
- 8. Multiple Choice
Which of the following is a requirement for every living cell to drive its chemical reactions?
Temperature
Atmosphere
Water
Sun
- 9. Multiple Choice
Which among the given factors enabled water in different phases to exist on Earth?
Temperature
Atmosphere
Diversity of Life
Sun
- 10. Multiple Choice
Why is the earth’s distance from the sun suitable for life forms to exist?
It gives the earth heat and light.
It maintains the temperature of the earth.
It provides the earth with available water for organisms.
It supplies the earth with enough gases in the atmosphere.
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