The water cycle, powered by the Sun and pulled by gravity
Grade 6 Science Worksheet
Circle the best answer.
the water level inside is the same as before. On a hot day, drops form on the outside of Bo's glass of ice water. Where did that water come from?
- Water evaporating from inside the glass
- Water leaking through the glass
- Melted ice seeping out through the side of the glass
- Water vapor in the air, cooled by the cold glass
Wet towels hung outside in the morning are dry by evening. Where did the water go, by Esme's thinking?
- Into the air as water vapor
- Down into the ground as runoff
- It was destroyed by the Sun
- It condensed into the towel threads
On a freezing morning, Jun breathes out and sees a small white cloud. What is the white cloud?
- Invisible water vapor
- Smoke made by the cold air
- Breath that evaporated in the cold
- Tiny drops from breath vapor that cooled
Rain falls on a grassy field with loose, dry soil. Where does much of the water go next, in Kira's model?
- It disappears into the grass
- It soaks into the ground toward the groundwater
- It has to flow along the surface straight to the ocean
- Back up to the clouds right away
A snowflake lands on a glacier high in the mountains. What might happen to its water, by Milo's reading?
- It vanishes once it lands
- It could stay frozen in the ice for many years
- It must melt and flow down to the ocean that same week
- It condenses back into a cloud
Read this first
Table (USGS, Where is Earth's Water?), with columns Place and Share of all water
Oceans about 96.5%; ice caps and glaciers about 1.7%; groundwater about 1.7%; lakes, rivers, air and living things, less than 0.1%.
Noah reads the USGS table of where Earth's water is. Where is most of Earth's water?
- Ice caps and glaciers
- The oceans, about 96.5%
- Rivers and lakes
- Clouds and air, since rain falls so often
Ice caps and glaciers about 69%; groundwater about 30%; lakes, rivers and other surface water about 1%. Pia reads that most of Earth's fresh water is not in rivers or lakes. Where is most of it, by the USGS figures?
- In clouds and fog
- In rivers and lakes
- Frozen in ice caps and glaciers
- Underground, at about 90%
Earth's water has been cycling for billions of years. Why don't the oceans dry up from evaporation, as Ren explains?
- Evaporated water is gone, so oceans slowly dry up
- Clouds hold the extra water for good
- Rain and rivers bring the water back
- Ocean water is too salty to evaporate
Table, Two puddles (example data, read about), with columns Puddle, Temperature and Time to dry
Puddle in shade, 18 °C (64 °F), dry after 6 hours; puddle in sun, 30 °C (86 °F), dry after 2 hours.
Tala reads about two equal puddles. The one in the shade, at 18 °C, dried in 6 hours. The one in the sun, at 30 °C, dried in 2 hours. What does this show?
- Warmer water evaporates faster
- The shady puddle condensed instead
- Gravity pulled the sunny puddle into the ground
- The sunny puddle's water was destroyed faster
On a cool, clear morning, the grass in Ari's yard is covered with dew. Where did the dew come from?
- The grass evaporated water onto itself
- Rain fell quietly during the night
- Water vapor in the air condensed on the cold grass
- Water leaked up and out of the tips of the grass blades