Briefly explain how greenhouse gases, carbon dioxide in particular, can absorb and radiate heat inside earth’s atmosphere and thereby contribute to the greenhouse effect.

2. Due to the Earth warming, it emits infrared light back toward space, but carbon dioxide absorbs it and causes the atmosphere to heat up.  Carbon dioxide acts like a blanket.

3. The Earth becomes hotter than before

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If the amount of energy from the sun and the amount of greenhouse gases such as methane, carbon dioxide in the atmosphere remain the same, the average temperature on Earth will also be constant. But in the current scenario the amount of greenhouse gases has exceed the amount the earth receives the sunlight due to burning of fossil fuels and others. The greenhouse gases are made of three or more atoms. This structures allows the gases to trap heat from the atmosphere and re-emit it towards a surface which further warms the earth climate. This effect is called as greenhouse effect.      

b. false

explanation:

suppose a rock in free fall is dropped off a cliff. after falling for 5 seconds, its speed would not be 100 m/s.