Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 378 · 40 questions

What you do (Find the experiment, use the idea): 1. Read the question and find its experiment. 2. Use that experiment’s idea — density, dissolving, capillary action, light bending, air pressure, push-back, air resistance or condensation. 3. For a fair-test question, find what is changed, kept the same and measured. 4. For a safety question, choose what keeps everyone safe.

1. 1.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is what we measure? (a) how many drops form (b) the time we wait (c) the amount of water (d) the cling film cover
2. 2.🔮 Predict: wet clothes are hung out on a sunny, windy day. How do they dry? (a) they turn to ice (b) they never dry (c) faster (d) slower
3. 3.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) green (b) violet (c) blue (d) red
4. 4.🛟 Who should trim the flower stem? (a) a pet (b) anyone, without looking (c) a toddler (d) a grown-up
5. 5.🧺 Do we need a long string for the balloon rocket? (a) not needed (b) needed
6. 6.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is the one thing we change? (a) the amount of water (b) the stirring (c) time to dissolve (d) the water temperature
7. 7.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a sink or a bucket (c) a stiff postcard (d) a magnet
8. 8.🧺 Do we need a strip of paper for the paper helicopter? (a) not needed (b) needed
9. 9.🍯 Which of these is denser than water? (a) cooking oil (b) a ping-pong ball (c) an ice cube (d) honey
10. 10.🛟 Why should only a grown-up handle any hot water? (a) hot water can scald (b) it changes colour (c) hot water is heavy (d) hot water is magnetic
11. 11.💧 Which of these is freezing? (a) drops on a cold glass (b) dew on morning grass (c) a pond icing over (d) sweat drying on skin
12. 12.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) yeast (b) a sunny window (c) a clear glass of water (d) a sheet of white paper
13. 13.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the amount of water is what we measure. (a) True (b) False
14. 14.🎈 Air rushes out of the back of the balloon. Which way does the balloon move? (a) backward (b) it stays still (c) forward (d) straight down
15. 15.🥄 Which of these dissolves slower? (a) powdered sugar (b) sugar stirred well (c) sugar in icy water (d) sugar in warm water
16. 16.🧺 Which of these is needed for the coloured flower experiment? (a) food colour (b) a mirror (c) a battery cell (d) yeast
17. 17.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the amount of water is what we measure. (a) False (b) True
18. 18.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they fall off at once (b) they stay white (c) they all turn green (d) they turn two colours
19. 19.True or false: an iron nail sinks in water. (a) True (b) False
20. 20.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) cooking oil (b) a spoon (c) yeast (d) water with food colour
21. 21.🌈 How many colours do we name in a rainbow (VIBGYOR)?
22. 22.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is what we measure? (a) time to dissolve (b) the water temperature (c) the kind of sugar (d) the stirring
23. 23.True or false: water a swimmer pushes goes backward. (a) False (b) True
24. 24.🛟 Which of these floats on water? (a) a ping-pong ball (b) a pebble (c) a coin (d) a steel spoon
25. 25.📘 What do we call water with sugar dissolved in it? (a) a crystal (b) a magnet (c) a rainbow (d) a solution
26. 26.🧺 Which of these is needed for the paper helicopter? (a) a mirror (b) a pencil (c) a battery cell (d) a magnet
27. 27.🍯 Is air denser or less dense than water? (a) less dense than water (b) denser than water
28. 28.🧺 Do we need yeast for the coloured flower experiment? (a) needed (b) not needed
29. 29.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a shadow of ice (b) snow falling (c) a small rainbow (d) a magnet
30. 30.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is kept the same? (a) the same tape (b) distance it travels (c) how big we blow it
31. 31.🧺 Which of these is needed for the water cycle bowl? (a) turmeric powder (b) a battery cell (c) sunlight (d) a magnet
32. 32.True or false: a battery cell is not needed for the float-or-sink test. (a) False (b) True
33. 33.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) a magnet (c) a balloon (d) turmeric powder
34. 34.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same glass”? (a) we keep it the same (b) we measure it (c) we change it
35. 35.🧺 Which of these is not needed for the density tower? (a) honey (b) a spoon (c) a battery cell (d) cooking oil
36. 36.🛟 Which rule keeps you safe when working with sunlight? (a) look at it through glass (b) look at it in a mirror (c) stare at the Sun (d) never look at the Sun
37. 37.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the time we wait is the one thing we change. (a) True (b) False
38. 38.🛟 Which rule keeps the density tower experiment safe? (a) taste each layer (b) pour it on the floor (c) do not lick the spoon (d) throw the glass
39. 39.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) under the honey (b) in the honey layer (c) on top of the oil (d) in the water layer
40. 40.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to hide the corks (b) to splash everyone (c) to win a prize (d) to keep children safe

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