WHAT DID YOU LEARN?

Corresponds to the water of the earth in oceans, rivers, lakes, groundwater, glaciers.

• Atmosphere

• Lithosphere

• Hydrosphere

Layer of mixed gases ( nitrogen, argon, carbon, dioxide, water vapor, ozone and others).

• Atmosphere

• Lithosphere

• Hydrosphere

Layer fomed by the earth's crust and by the most external part of the upper mantle.

• Atmosphere

• Lithosphere

• Hydrosphere

How many layers does the atmosphere have?

• 3

• 7

• 6

Only the 3% of water is salt water.

• True

• False

Answer explanation

The 3 % is fresh water and the 97% corresponds to the salt water.

Water is the habitat of many organisms.

• True

• False

Soil is not indispensanle for animal and plant life.

• True

• False

Answer explanation

Soil is indispensable for animal and plan life. We use soil for agriculture and foresty, which provide us foods and raw materials for other products.

Why atmosphere is important to living things?

• Living things need the gases present in the atmosphere.

• Living things doesn't need the gases present in the atmosphere.

• Photosyntesis requires animals and respiration requies water.

• Photosyntesis requires carbon diaxide and respiration requires oxygen.

Why hydrosphere is important to living things?

• Because they need water to obtain energy.

• Because they have water in their cells.

• Because some organisms have the water as their habitat.

• Because they doesn't need water to obtain enegy.

Why lithosphere is important to living things?

• Because in the soil there are many minerals as well as organic matter.

• Because provides the enery for some organisms from the water.

• Because plants absorb mineral and water for photosyntesis from soil.