What type of gases holds in heat and keeps the earth at a moderate temperature?

primary gases

ozone layer

trace gases

greenhouse gases

Briefly explain the meaning of Soil Acidity and how it is measured

Analyze the map below and answer the question that follows. A topographical map of the U S. Regions are labeled 1 to 6. 1 is on the west coast of California, Oregon, and Washington. 2 is an area in Nevada, Idaho, and Utah.

The North Pole is tilted closest to the sun during the: winter solstice summer solstice vernal equinox autumnal equinox

Merchants were the top class in the caste system of the ancient Aryans. True or false

How are earth sphere defined

Explain the characteristics of authoritarianism, and identify two Central Asian countries that have this type of government

Why are the rivers so vital to europe's economy?

5x-4+21+90=180, what is it?

Which statement is NOT true of North Korea A. It is generally believed in North Korea possess nuclear weapons B. North Korea limits trade with each other continental neighbors, China and Russia C. Low-lying mountains cover its northern region D.

Why are oxygen concentrations in the deep waters of the North Atlantic higher than the concentrations found in the deep North Pacific?