Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 319 · 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 not needed for the density tower? (a) a mirror (b) honey (c) a tall clear glass (d) a spoon
2. 2.🚢 Why can a heavy steel ship float on the sea? (a) steel is very light (b) sea water is warm (c) it has a magnet (d) its hollow shape
3. 3.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is kept the same? (a) the shape of the clay (b) the tub of water (c) whether it floats
4. 4.🧺 Which of these is needed for the density tower? (a) honey (b) a battery cell (c) a magnet (d) a mirror
5. 5.🥄 Which of these dissolves slower? (a) sugar in warm water (b) a big sugar cube (c) sugar stirred well (d) powdered sugar
6. 6.True or false: cooking oil is less dense than water. (a) True (b) False
7. 7.🧺 Which of these is not needed for the water cycle bowl? (a) ice cubes (b) a big bowl (c) a magnet (d) water
8. 8.🛟 Which is a safe rule for the balloon rocket? (a) keep it away from faces (b) put string round a neck (c) aim it at your friend (d) blow it till it bursts
9. 9.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a towel (c) a glass of water (d) yeast
10. 10.🌈 How many colours do we name in a rainbow (VIBGYOR)?
11. 11.True or false: a suction hook works by magnetism. (a) True (b) False
12. 12.🔍 Which is the odd one out? (a) chalk powder (b) table salt (c) baking soda (d) food colour
13. 13.🚁 Which of these falls slowly through the air? (a) a stone (b) a coin (c) a glass marble (d) a toy parachute
14. 14.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the time of day”? (a) we keep it the same (b) we measure it (c) we change it
15. 15.🛟 Why should you not over-blow the balloon? (a) it turns into a kite (b) it can pop loudly (c) it gets too heavy (d) it changes colour
16. 16.🍯 Is cooking oil denser or less dense than water? (a) denser than water (b) less dense than water
17. 17.🌊 What pushes a floating cork upward? (a) the cork itself (b) the water (c) the air above (d) the tub
18. 18.True or false: a big sugar cube dissolves faster. (a) True (b) False
19. 19.💧 Dip a piece of foil into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
20. 20.🔮 Predict: you put ice cubes on top of the cling film. What happens? (a) fewer drops form (b) the water turns red (c) more drops form (d) the bowl freezes
21. 21.🛟 Why should the glass of water stand on a steady, flat place? (a) so it does not fall (b) so the Sun moves (c) so it gets hot (d) so it turns blue
22. 22.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) the sugar cube (b) powdered sugar (c) both the same (d) neither of them
23. 23.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of colour is kept the same. (a) False (b) True
24. 24.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of colour is what we measure. (a) True (b) False
25. 25.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: how many drops form is the one thing we change. (a) True (b) False
26. 26.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) two chairs (b) a balloon (c) a mirror (d) sticky tape
27. 27.🛟 Why should we wipe up spilled oil at once? (a) oil makes it rain (b) oil attracts magnets (c) oil turns into honey (d) spilled oil is slippery
28. 28.🍯 Which of these is denser than water? (a) air (b) an ice cube (c) honey (d) a ping-pong ball
29. 29.🔍 Which is the odd one out? (a) honey (b) a coin (c) cooking oil (d) a pebble
30. 30.🧺 Do we need a sunny window for the water rainbow? (a) needed (b) not needed
31. 31.🛟 Which of these floats on water? (a) a metal key (b) a steel spoon (c) a pebble (d) an ice cube
32. 32.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is what we measure? (a) time for colour to show (b) the length of the stem (c) the room it stands in (d) the kind of flower
33. 33.🔮 Predict: you shake oil and water hard in a closed bottle and wait. What happens? (a) they become solid (b) they mix for ever (c) they separate again (d) they turn to honey
34. 34.🧺 Do we need yeast for the coloured flower experiment? (a) needed (b) not needed
35. 35.True or false: very salty water is denser than water. (a) True (b) False
36. 36.🔍 Which is the odd one out? (a) a crumpled paper ball (b) a stone (c) a feather (d) a coin
37. 37.🧺 Do we need water with food colour for the density tower? (a) needed (b) not needed
38. 38.🔍 Which is the odd one out? (a) a paper helicopter (b) an open sheet of paper (c) a steel spoon (d) a toy parachute
39. 39.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same string”? (a) we measure it (b) we change it (c) we keep it the same
40. 40.🚁 Dropped from a raised hand, does a coin fall slowly or fast? (a) falls fast (b) falls slowly

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