Read the text below and answer the following questions. How does global warming happen? The Earth’s atmosphere is made up oxygen, nitrogen and a dozen other gases. All of these serve to capture a certain amount of heat and keep the Earth warm. The heat of sunlight radiates outward back into the air. The molecules in the air absorb and release that heat. Certain molecules that are heavier than others radiate more heat back to earth. This absorption and reflection of heat is known as the greenhouse effect. When we keep adding to the special mixture of our air too much of certain ingredients such as Carbon dioxide. Carbon dioxide is necessary to nature. Plants use CO2 and sunlight to create sugars and fresh oxygen. This is what many scientists thought when they first examined global warming. Nevertheless, we only have so many plants, and oceans which also absorb CO2, are at maximum capacity. So all this extra Carbon dioxide goes up into the atmosphere where it blocks the release of heat leaving the earth. Gases such as CO2 that absorb heat that otherwise would have expelled to outer space are called greenhouse gases. (Adapted from thousandsideas.com) “The molecules in the air absorb and release that heat.” The synonym of the underlined word is….

Question

Read the text below and answer the following questions.

How does global warming happen?

The Earth’s atmosphere is made up oxygen, nitrogen and a dozen other gases. All of these serve to capture a certain amount of heat and keep the Earth warm. The heat of sunlight radiates outward back into the air. The molecules in the air absorb and release that heat. Certain molecules that are heavier than others radiate more heat back to earth. This absorption and reflection of heat is known as the greenhouse effect.

When we keep adding to the special mixture of our air too much of certain ingredients such as Carbon dioxide. Carbon dioxide is necessary to nature. Plants use CO2 and sunlight to create sugars and fresh oxygen. This is what many scientists thought when they first examined global warming.

Nevertheless, we only have so many plants, and oceans which also absorb CO2, are at maximum capacity. So all this extra Carbon dioxide goes up into the atmosphere where it blocks the release of heat leaving the earth. Gases such as CO2 that absorb heat that otherwise would have expelled to outer space are called greenhouse gases.

(Adapted from thousandsideas.com)

“The molecules in the air absorb and release that heat.”

The synonym of the underlined word is….