Water Cycle

Front

What is the energy source that causes puddles of water to disappear after a sunny day and drives the water cycle?

Back

sun

Answer explanation

The sun is the primary energy source for the water cycle. It heats water in oceans, causing evaporation, which leads to cloud formation and precipitation, thus driving the entire cycle.

Front

What are clouds made of?

Back

water

Answer explanation

Clouds are primarily made of water in the form of tiny droplets or ice crystals. Dry air does not form clouds, making water the correct answer.

Front

What process is responsible for generating most of the water vapor in the air above a lake on a warm, sunny day?

Back

Evaporation

Answer explanation

Most water vapor on Earth is generated by evaporation, where water from oceans, lakes, and rivers turns into vapor due to heat. This process is crucial for the water cycle, unlike condensation, precipitation, or transpiration.

Front

What are formed when water vapor condenses?

Back

Clouds

Answer explanation

When water vapor cools and condenses, it forms tiny water droplets that cluster together, creating clouds. This process is essential in the water cycle and is responsible for cloud formation.

Front

What is the gas form of water that rises as mist from a boiling kettle called?

Back

water vapor

Answer explanation

Water in its gas form is called water vapor. This term specifically refers to the gaseous state of water, distinguishing it from its liquid and solid forms, which are known as liquid water and ice, respectively.

Front

Isla is watching the weather outside her window. She notices sleet, hail, and snow falling from the sky. Which of the following is an example of precipitation?

Back

all of the above

Answer explanation

Precipitation includes all forms of water, liquid or solid, that fall from the atmosphere. Sleet, hail, and snow are all types of precipitation, making 'all of the above' the correct answer.

Front

How does groundwater reenter the water cycle when it seeps out of the ground and forms a puddle?

Back

by evaporation

Answer explanation

When groundwater reaches the surface, it can reenter the water cycle by evaporation. This process transforms water from liquid to vapor, allowing it to rise into the atmosphere and continue the cycle.

Front

What process is observed when water disappears from the surface into the air on a sunny day?

Back

Evaporation

Answer explanation

A is Evaporation, which is the process where liquid water turns into vapor. This is a key part of the water cycle, leading to cloud formation and precipitation.

Front

What part of the water cycle does this picture show?

Back

precipitation

Answer explanation

The picture shows precipitation, which is the part of the water cycle where water falls from the atmosphere to the ground as rain, snow, or other forms. This distinguishes it from evaporation and condensation.

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.