Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 699 · 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.🔮 A flat sheet and a crumpled ball of the same paper drop together. Which lands first? (a) the crumpled ball (b) the flat sheet (c) a sheet of glass (d) neither of them
2. 2.🔮 Predict: the string slopes uphill. What happens? (a) it goes backward first (b) it travels farther (c) it speeds up (d) it travels less far
3. 3.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is the one thing we change? (a) the way we turn it (b) the same glass (c) whether the card stays (d) how full the glass is
4. 4.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a battery cell (b) a towel for spills (c) small test objects (d) a tub of water
5. 5.🔮 Predict: wet clothes are hung out on a sunny, windy day. How do they dry? (a) they never dry (b) faster (c) slower (d) they turn to ice
6. 6.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is kept the same? (a) the same three liquids (b) the order of the layers (c) the order of pouring
7. 7.🌈 How many colours do we name in a rainbow (VIBGYOR)?
8. 8.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) ice cubes (b) a big bowl (c) a mirror (d) a small cup
9. 9.🔍 How can you get the salt back from salty water? (a) add more water (b) let the water evaporate (c) keep it in a fridge (d) stir it more
10. 10.🛟 Which rule keeps the density tower experiment safe? (a) do not lick the spoon (b) throw the glass (c) pour it on the floor (d) taste each layer
11. 11.🧺 Which of these is not needed for the balloon rocket? (a) sticky tape (b) a drinking straw (c) turmeric powder (d) two chairs
12. 12.⚖️ 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 same glass (b) the same window (c) the amount of water (d) brightness of rainbow
13. 13.True or false: warm water is needed for the dissolving test. (a) False (b) True
14. 14.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the kind of flower”? (a) we keep it the same (b) we change it (c) we measure it
15. 15.True or false: making ice lollies is evaporation. (a) True (b) False
16. 16.True or false: a magnetic pin holder works by air pressure. (a) True (b) False
17. 17.🍯 Is air denser or less dense than water? (a) denser than water (b) less dense than water
18. 18.🥄 Which of these does not dissolve in water? (a) chalk powder (b) glucose powder (c) sugar (d) baking soda
19. 19.True or false: a battery cell is not needed for the float-or-sink test. (a) True (b) False
20. 20.🔍 Which is the odd one out? (a) baking soda (b) food colour (c) table salt (d) chalk powder
21. 21.True or false: a battery cell is needed for the paper helicopter. (a) False (b) True
22. 22.💧 Dip a sugar cube into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
23. 23.True or false: yeast is not needed for the paper helicopter. (a) False (b) True
24. 24.True or false: a results table is needed for the float-or-sink test. (a) False (b) True
25. 25.🔮 A cork floats in tap water. What happens in very salty water? (a) it turns white (b) it dissolves (c) it sinks (d) it still floats
26. 26.True or false: a sugar cube does not let water climb. (a) False (b) True
27. 27.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the amount of water”? (a) we change it (b) we measure it (c) we keep it the same
28. 28.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it melts (b) it turns blue (c) it floats higher (d) it sinks
29. 29.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the cling film cover is what we measure. (a) False (b) True
30. 30.🧺 Which of these is needed for the float-or-sink test? (a) a balloon (b) a magnet (c) small test objects (d) a mirror
31. 31.🧊 Why does an ice cube float on water? (a) ice is very cold (b) water is sticky (c) ice is magnetic (d) ice is less dense
32. 32.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is the one thing we change? (a) the shape of the clay (b) the kind of clay (c) whether it floats (d) the amount of clay
33. 33.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a paper clip (b) safety scissors (c) a strip of paper (d) turmeric powder
34. 34.🧺 Do we need a mirror for the float-or-sink test? (a) needed (b) not needed
35. 35.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the amount of clay is kept the same. (a) True (b) False
36. 36.🚀 Which of these goes forward? (a) the rowing boat (b) air from the balloon (c) water from the oars (d) water a swimmer pushes
37. 37.True or false: a puddle drying up is melting. (a) True (b) False
38. 38.🍯 Is a pebble denser or less dense than water? (a) less dense than water (b) denser than water
39. 39.🧺 Do we need a teaspoon for the dissolving test? (a) needed (b) not needed
40. 40.True or false: safety scissors is needed for the paper helicopter. (a) True (b) False

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