Free PDFGrade 2 · Science · 40 min
Rainwater harvesting
Catch rain, measure it and use it for plants.
I can measure rain in cm and tell where rain comes from.
A science experiment video with a free worksheet and answer key for teachers
About the video
In the video rainwater is caught, measured and used for plants. At home your child tapes a ruler to a straight sided jar, places it outside away from trees and roofs, reads the rain in cm every day at 8:00 for 5 days, and then waters a plant with it.
The sun warms water in seas and lakes, it turns into vapour and rises, cools into clouds and falls as rain when the drops get heavy. The jar works as a rain gauge, and using rainwater for plants saves tap water.
What your child learns
- Measure rain in cm with a ruler
- Describe the water cycle in 4 steps
- Keep a daily rain diary for 5 days
What's on the worksheet
- 1Predict first
- 2My rain diary
- 3The science behind it
- 4The water cycle
- 5Match the words
- 6True or false
- 7Rain math
- 8Save water
You need
1 clear jar with straight sides and a flat bottom (about 10 cm tall), 1 ruler in cm, tape, 4 stones, 1 watering can, 1 plant.
Safety
Do not drink the rainwater.
Tip for the adult
Check that the 0 on the ruler sits exactly at the bottom of the jar, otherwise every reading is wrong.
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