The Water Cycle Quiz

Grade 4 · Science · Quiz

Test your knowledge of the water cycle and how water moves through Earth's systems.

Questions

1. What is evaporation?

   1. Water freezing into ice
   2. Liquid water turning into water vapor
   3. Water falling from clouds
   4. Water soaking into the ground
   Show answer

   Answer: Liquid water turning into water vapor

   Evaporation is when liquid water absorbs heat energy from the sun and changes into an invisible gas called water vapor.

2. What form does water take when it condenses in the atmosphere?

   1. Ice crystals
   2. Steam
   3. Tiny cloud droplets
   4. Groundwater
   Show answer

   Answer: Tiny cloud droplets

   When water vapor condenses, it forms tiny liquid droplets that cluster together to form clouds.

3. Which is NOT a form of precipitation?

   1. Rain
   2. Snow
   3. Evaporation
   4. Hail
   Show answer

   Answer: Evaporation

   Evaporation is a stage of the water cycle, not a form of precipitation. Rain, snow, sleet, and hail are all forms of precipitation.

4. What do we call water that flows over the land surface into rivers?

   1. Groundwater
   2. Transpiration
   3. Runoff
   4. Condensation
   Show answer

   Answer: Runoff

   Runoff is water that flows over the ground surface into streams, rivers, and eventually the ocean.

5. Oceans are the largest source of water evaporation on Earth.

   Show answer

   Answer: True

   Oceans cover about 71% of Earth's surface and are the primary source of water evaporation, providing most of the water vapor in the atmosphere.

6. Transpiration is when plants absorb water through their roots.

   Show answer

   Answer: False

   Transpiration is when plants release water vapor THROUGH THEIR LEAVES into the atmosphere, not absorbing water through roots (that is absorption).

7. About 97% of Earth's water is salt water in the oceans.

   Show answer

   Answer: True

   About 97% of Earth's water is saltwater in the oceans. Only about 3% is fresh water, and most of that is frozen in glaciers.

8. Water that seeps into the ground and is stored underground is called ___.

   Show answer

   Answer: groundwater

   Groundwater is precipitation that soaks into the soil and rock. It collects in underground reservoirs called aquifers.

9. The process of water vapor from plants being released into the air is called ___.

   Show answer

   Answer: transpiration

   Transpiration is the release of water vapor through plant leaves. Forests release huge amounts of water this way.

10. What happens to water vapor as it rises higher into the atmosphere?

    1. It gets warmer and evaporates more
    2. It cools down and condenses
    3. It turns into oxygen
    4. It disappears
    Show answer

    Answer: It cools down and condenses

    As water vapor rises, it encounters cooler temperatures at higher altitudes. This cooling causes the vapor to condense into cloud droplets.

Get a personalized course on The Water Cycle built around your child.