Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 254 · 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.🧺 Do we need sticky tape for the balloon rocket? (a) not needed (b) needed
2. 2.🛟 Which rule keeps the density tower experiment safe? (a) do not lick the spoon (b) taste each layer (c) throw the glass (d) pour it on the floor
3. 3.True or false: table salt dissolves in water. (a) True (b) False
4. 4.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is the one thing we change? (a) the amount of water (b) the kind of flower (c) the amount of colour (d) the length of the stem
5. 5.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: time to reach the floor is what we measure. (a) True (b) False
6. 6.⚖️ 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) False (b) True
7. 7.🚁 Which of these falls fast through the air? (a) an open sheet of paper (b) a fluff of cotton (c) a steel spoon (d) a feather
8. 8.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the slope of the string”? (a) we change it (b) we keep it the same (c) we measure it
9. 9.🌈 Why does sunlight make a rainbow through a glass of water? (a) the water is coloured (b) the glass is painted (c) the paper makes colours (d) water splits the light
10. 10.🛟 Which of these floats on water? (a) a glass marble (b) a steel spoon (c) a pebble (d) an empty capped bottle
11. 11.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) water is hiding there (c) the cap is sticky (d) the bottle is magnetic
12. 12.🧺 Which of these is not needed for the dissolving test? (a) cold water (b) warm water (c) a mirror (d) sugar
13. 13.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is what we measure? (a) the amount of water (b) the same white paper (c) brightness of rainbow (d) the same window
14. 14.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) prisms (b) balloons (c) clouds (d) magnets
15. 15.🌈 In VIBGYOR, what number colour is violet?
16. 16.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is the one thing we change? (a) the same three liquids (b) how much of each liquid (c) the order of pouring (d) the same glass
17. 17.🛟 Does a cork float or sink in water? (a) floats (b) sinks
18. 18.🛟 How should you check if the sugar has dissolved? (a) look for leftover grains (b) smell it closely (c) poke it with a finger (d) taste it
19. 19.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) a magnet (c) glue on the card (d) the cold water
20. 20.🧺 Do we need a balloon for the paper helicopter? (a) not needed (b) needed
21. 21.🔍 Which is the odd one out? (a) a pebble (b) a steel spoon (c) an ice-cream stick (d) a ball of clay
22. 22.🔮 Predict: you fold the two blades the other way. What changes? (a) it turns blue (b) it falls upward (c) it does not fall (d) it spins the other way
23. 23.🧺 Which of these is needed for the balloon rocket? (a) yeast (b) a mirror (c) turmeric powder (d) a balloon
24. 24.🧺 Which of these is not needed for the balloon rocket? (a) sticky tape (b) two chairs (c) a long string (d) turmeric powder
25. 25.🔍 Which is the odd one out? (a) cooking oil (b) sugar (c) sawdust (d) chalk powder
26. 26.🔍 Which is the odd one out? (a) a cork (b) a pebble (c) a glass marble (d) honey
27. 27.💧 Which change is this: a puddle drying up? (a) condensation (b) melting (c) freezing (d) evaporation
28. 28.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it will not break (c) it is hotter (d) it is magnetic
29. 29.🛟 Does a dry leaf float or sink in water? (a) floats (b) sinks
30. 30.True or false: cling film is needed for the water cycle bowl. (a) False (b) True
31. 31.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “how full the glass is”? (a) we measure it (b) we keep it the same (c) we change it
32. 32.🧺 Which of these is needed for the dissolving test? (a) a balloon (b) a comb (c) a clock or timer (d) honey
33. 33.🛟 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
34. 34.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a teaspoon (b) cold water (c) a magnet (d) warm water
35. 35.🔍 Which is the odd one out? (a) dew on morning grass (b) drops on a cold glass (c) a puddle drying up (d) a misty bathroom mirror
36. 36.🧺 Do we need yeast for the paper helicopter? (a) not needed (b) needed
37. 37.True or false: a magnet is not needed for the balloon rocket. (a) True (b) False
38. 38.True or false: a pond icing over is condensation. (a) True (b) False
39. 39.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) sugar (b) a clock or timer (c) a mirror (d) two clear glasses
40. 40.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True

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