Which statements about earth’s atmosphere are correct? check all that apply. the most abundant gas in the atmosphere is oxygen. carbon dioxide in the atmosphere is important for plants. the troposphere shields earth from chunks of rock from space. the stratosphere is located 50 to 80 kilometers from earth’s surface. the troposphere gets colder the higher you go. the ozone in the stratosphere protects us from ultraviolet radiation. the amount of water vapor in the air is nearly constant.

The correct statements are:

- Carbon dioxide in the atmosphere is important for plants;

The carbon dioxide is one of the most important gases for the plants. The reason for that is that the plants use the carbon dioxide for the process of photosynthesis, which is the process through which they make their own food.

- The troposphere gets colder the higher you go;

The troposphere is the warmest at its lowest parts, and the coldest at its highest parts. The reason for that is that the land and the water manage to absorb a lot of heat, the heat radiates from them, which in turn makes the lower parts of the troposphere warmer as they are more exposed to it.

- The ozone in the stratosphere protects us from ultraviolet radiation;

The ozone layer is crucial for the survival of the living organisms on the Earth. It is the layer that manages to absorb mot of the ultra violet radiation from the sun. If this layer doesn't exist, the living organisms will be fried to death.

- The amount of water vapor in the air is nearly constant;

The amount of water vapor in the atmosphere (as a whole) is nearly constant, though there are differences from region to region. The main reason for this is that there is constant evaporation, but also there's always precipitation, thus it balances itself.

the aksumite empire was an ancient kingdom located in what is now northern ethiopia from the period of 100 ad to 940 ad. its capital was the city of aksum. the kingdom established itself as one of the 4 great powers at its time, along with persia, rome, and china.

the kingdom was rich in goods like gold, iron, and salt. it established strong commercial ties with the regions governed by rome, egypt, and persia (arabia). aksum was a key location in this commercial network. trade was also facilitated with the introduction of the aksumite currency.