Water cycle review

Front

Water vapor is water in which form?

Back

gas

Answer explanation

Water vapor is the gaseous form of water. Unlike liquid water or ice (solid), water vapor consists of water molecules in the air, making it a gas. Therefore, the correct answer is gas.

Front

What is it called when a gas turns into a liquid?

Back

condensation

Answer explanation

When a gas cools down, it loses energy and transitions into a liquid state. This process is known as condensation, which is the opposite of evaporation, where a liquid turns into a gas.

Front

When water forms water vapor, what process is happening?

Back

evaporation

Answer explanation

When water forms water vapor, it undergoes evaporation. This process occurs when liquid water gains enough energy to change into gas, resulting in water vapor. The other options, like condensation, involve the opposite process.

Front

How old is most of the water we drink today?

Back

millions of years

Answer explanation

Most of the water we drink today is millions of years old, as it has been part of the Earth's hydrological cycle for a very long time, undergoing processes like evaporation and precipitation over vast periods.

Front

What do you call water vapor that has condensed onto grass?

Back

dew

Answer explanation

Water vapor that condenses on grass forms tiny droplets, which is known as dew. Unlike rain, which falls from clouds, dew forms directly on surfaces when temperatures drop at night.

Front

What is the constant motion of water condensing and evaporating all around us called?

Back

water cycle

Answer explanation

The constant motion of water condensing and evaporating is known as the water cycle. This process is essential for distributing water throughout the environment, making 'water cycle' the correct answer.

Front

Why is runoff important?

Back

It returns water to other locations on Earth

Answer explanation

Runoff is important because it returns water to other locations on Earth, helping to replenish rivers, lakes, and groundwater. This process is essential for maintaining the water cycle and supporting ecosystems.

Front

Snow, sleet, hail, and rain are all examples of ________________.

Back

precipitation

Answer explanation

Snow, sleet, hail, and rain are all forms of water that fall from the atmosphere to the ground. This process is known as precipitation, making it the correct choice among the options provided.

Front

What is it called when plants give off water vapor as a waste product?

Back

transpiration

Answer explanation

The process by which plants release water vapor as a waste product is called transpiration. This is essential for regulating water and nutrient flow within the plant.

Front

Which stage does the #2 show in the diagram?

Back

evaporation

Answer explanation

The #2 stage in the diagram represents evaporation, where water transforms from liquid to vapor due to heat. This process is essential in the water cycle, distinguishing it from condensation, precipitation, and runoff.