Question

what part of the atmosphere blocks most of the suns harmful uv rays?
a. water vapor
b. carbon dioxide
c. nitrogen
d. ozone
what do we call the area around a star where a planet can have liquid water?
a. water belt
b. life circle
c. goldilocks zone
d. sun ring
which of these is not a main \greenhouse gas\ that traps heat in the atmosphere?
a. water vapor
b. carbon dioxide
c. oxygen
d. methane
which of these describes an \extremophile\?
a. an organism that only lives on land
b. an organism that lives in very harsh conditions
c. plants that need a lot of sunlight
d. tiny living things that can only live in water

Explanation:

• For the first question: Ozone (\(O_3\)) in the stratosphere absorbs most of the Sun's harmful UV rays. Water vapor (\(H_2O\)), carbon dioxide (\(CO_2\)), and nitrogen (\(N_2\)) do not have this primary role in blocking UV rays.
• For the second question: The Goldilocks Zone (also known as the habitable zone) is the area around a star where a planet can have liquid water. The other options (White Belt, Life Circle, Sun Ring) are not the standard terms for this concept.
• For the third question: Oxygen (\(O_2\)) is not a main greenhouse gas. Greenhouse gases include water vapor (\(H_2O\)), carbon dioxide (\(CO_2\)), and methane (\(CH_4\)) as they trap heat in the atmosphere.
• For the fourth question: An extremophile is an organism that lives in very harsh conditions. Option A is incorrect as they don't only live in lava (though some can live in high - temperature environments). Option C is about plants needing sunlight (not extremophiles). Option D is about water - dependent life (not extremophiles).

Answer:

1. D. Ozone
2. C. Goldilocks Zone
3. C. Oxygen
4. B. An organism that lives in very harsh conditions