Answer:

1.troposphere

2.stratosphere

3.mesosphere

4.thermosphere

5.?

6.?

2.Not one of the other million or so known animal species can do that. Oxygen, in some form, is often assumed to be vital for animal life. Yet the existence of these creatures seemed to blow a hole in this theory, with far-reaching implications for our understanding of life on Earth.

The tiny Mediterranean animals belong to a group called the loriciferans – an animal group so unusual that it was not discovered until the 1980s.

3.A greenhouse works by converting light energy into heat energy. Light rays from the sun enter the greenhouse, where they are absorbed by plants and objects and converted to heat. The itmes in the greenhouse release the heat energy, but it is trapped in the small space of the greenhouse by the glass (or plastic sheeting).

Besides CO2 there are other greenhouse gases. These include water vapor, methane, nitrous oxide, and ozone. Without any greenhouse gases, Earth would be an icy wasteland. Greenhouse gases keep our planet livable by holding onto some of Earth’s heat energy so that it doesn’t all escape into space. This heat trapping is known as the greenhouse effect.

A family portrait of the big five greenhouse gases: carbon dioxide, ozone, nitrous oxide, methane, and water vapor.

Just as too little greenhouse gas makes Earth too cold, too much greenhouse gas makes Earth too warm.

4.Greenhouse effect

The greenhouse effect is a natural process that warms the Earth’s surface. When the Sun’s energy reaches the Earth’s atmosphere, some of it is reflected back to space and the rest is absorbed and re-radiated by greenhouse gases.

Greenhouse gases include water vapour, carbon dioxide, methane, nitrous oxide, ozone and some artificial chemicals such as chlorofluorocarbons (CFCs).

The absorbed energy warms the atmosphere and the surface of the Earth. This process maintains the Earth’s temperature at around 33 degrees Celsius warmer than it would otherwise be, allowing life on Earth to exist.

5.Besides CO2 there are other greenhouse gases. These include water vapor, methane, nitrous oxide, and ozone. Without any greenhouse gases, Earth would be an icy wasteland. Greenhouse gases keep our planet livable by holding onto some of Earth’s heat energy so that it doesn’t all escape into space. This heat trapping is known as the greenhouse effect.

A family portrait of the big five greenhouse gases: carbon dioxide, ozone, nitrous oxide, methane, and water vapor.

Just as too little greenhouse gas makes Earth too cold, too much greenhouse gas makes Earth too warm.