Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 436 · 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.🍯 Which of these is denser than water? (a) cooking oil (b) a ping-pong ball (c) a cork (d) very salty water
2. 2.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to hide the corks (b) to win a prize (c) to keep children safe (d) to splash everyone
3. 3.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) sugar (b) a clock or timer (c) a teaspoon (d) a magnet
4. 4.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the size of the bowl”? (a) we keep it the same (b) we change it (c) we measure it
5. 5.🔍 Which is the odd one out? (a) a cotton thread (b) a piece of chalk (c) a strip of cloth (d) a piece of foil
6. 6.🔍 Which is the odd one out? (a) a cotton thread (b) a plastic ruler (c) a sugar cube (d) a paper towel
7. 7.True or false: sticky tape is needed for the balloon rocket. (a) False (b) True
8. 8.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “time for colour to show”? (a) we change it (b) we measure it (c) we keep it the same
9. 9.True or false: a fridge magnet works by magnetism. (a) True (b) False
10. 10.🍯 Is a glass marble denser or less dense than water? (a) denser than water (b) less dense than water
11. 11.🔍 Which is the odd one out? (a) a magnetic chess set (b) a magnetic pin holder (c) a fridge magnet (d) a suction hook
12. 12.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is kept the same? (a) the water temperature (b) the amount of sugar (c) time to dissolve
13. 13.True or false: a strip of paper is not needed for the paper helicopter. (a) True (b) False
14. 14.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) a battery cell (c) a few hours of waiting (d) a glass of water
15. 15.🔍 Which is the odd one out? (a) a plastic ruler (b) a glass marble (c) a piece of chalk (d) a rubber eraser
16. 16.💧 Which of these is melting? (a) water becoming ice (b) a puddle drying up (c) butter going runny (d) dew on morning grass
17. 17.🍯 Which of these is less dense than water? (a) a cork (b) a pebble (c) honey (d) very salty water
18. 18.💧 Which of these lets water climb up it? (a) a sugar cube (b) a glass marble (c) a rubber eraser (d) a steel spoon
19. 19.True or false: drops on a cold glass is evaporation. (a) True (b) False
20. 20.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) the amount of water (b) the same window (c) brightness of rainbow
21. 21.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) small test objects (b) a results table (c) a balloon (d) a towel for spills
22. 22.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? What do we do with “the same glass”? (a) we change it (b) we measure it (c) we keep it the same
23. 23.True or false: honey is not needed for the density tower. (a) False (b) True
24. 24.💧 Dip a cotton thread into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
25. 25.True or false: a mirror is not needed for the paper helicopter. (a) False (b) True
26. 26.🧺 Do we need water with food colour for the density tower? (a) not needed (b) needed
27. 27.🧺 Do we need turmeric powder for the density tower? (a) needed (b) not needed
28. 28.True or false: a cork is denser than water. (a) False (b) True
29. 29.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a stiff postcard (c) a towel (d) turmeric powder
30. 30.True or false: small pebbles does not dissolve in water. (a) False (b) True
31. 31.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) food colour (b) a glass of water (c) a few hours of waiting (d) a balloon
32. 32.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the amount of sugar is kept the same. (a) True (b) False
33. 33.True or false: a comb is not needed for the dissolving test. (a) False (b) True
34. 34.🛟 Which rule keeps you safe when working with sunlight? (a) stare at the Sun (b) look at it through glass (c) look at it in a mirror (d) never look at the Sun
35. 35.🔮 Predict: you blow the balloon up only a little. What happens? (a) it turns into a kite (b) it goes much farther (c) it flies off the string (d) it goes less far
36. 36.True or false: ice becoming water is melting. (a) True (b) False
37. 37.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is kept the same? (a) time to reach the floor (b) the length of the blades (c) the kind of paper
38. 38.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) violet (b) red (c) yellow (d) orange
39. 39.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a magnetic chess set (c) a drinking straw (d) a suction hook
40. 40.🧺 Do we need a balloon for the density tower? (a) needed (b) not needed

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids