Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 821 · 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 — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) the kind of paper (b) the drop height (c) the length of the blades (d) the paper clip
2. 2.🧺 Do we need a spoon for the density tower? (a) not needed (b) needed
3. 3.True or false: a metal key floats on water. (a) True (b) False
4. 4.True or false: the balloon goes forward. (a) True (b) False
5. 5.🧺 Which of these is needed for the dissolving test? (a) a balloon (b) a mirror (c) warm water (d) a comb
6. 6.True or false: the rocket goes backward. (a) False (b) True
7. 7.True or false: a pencil is not needed for the paper helicopter. (a) False (b) True
8. 8.⚖️ 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 colour (b) the kind of flower (c) the length of the stem (d) the room it stands in
9. 9.🛟 Why should only a grown-up handle any hot water? (a) hot water is magnetic (b) hot water is heavy (c) hot water can scald (d) it changes colour
10. 10.⚖️ 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 change it (b) we measure it (c) we keep it the same
11. 11.True or false: a balloon is not needed for the coloured flower experiment. (a) False (b) True
12. 12.🚀 Which of these goes forward? (a) the balloon (b) air from the balloon (c) water from the oars (d) gas from the rocket
13. 13.🍯 Which of these is less dense than water? (a) a coin (b) a pebble (c) cooking oil (d) very salty water
14. 14.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the stirring”? (a) we measure it (b) we keep it the same (c) we change it
15. 15.True or false: air is less dense than water. (a) True (b) False
16. 16.🔍 Which is the odd one out? (a) a feather (b) a pebble (c) a cork (d) a dry leaf
17. 17.💧 Which of these is freezing? (a) drops on a cold glass (b) snow turning to water (c) a pond icing over (d) drops under a pot lid
18. 18.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the paper clip”? (a) we measure it (b) we change it (c) we keep it the same
19. 19.⚖️ 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 sugar (b) the amount of water (c) the water temperature (d) time to dissolve
20. 20.True or false: a fridge magnet works by magnetism. (a) True (b) False
21. 21.🧺 Do we need yeast for the coloured flower experiment? (a) not needed (b) needed
22. 22.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a paper clip (b) a ruler (c) safety scissors (d) a magnet
23. 23.🛟 What should you do after handling food colour? (a) wipe them on walls (b) wash your hands (c) lick your fingers (d) rub your eyes
24. 24.🥄 Which of these dissolves slower? (a) sugar in warm water (b) sugar stirred well (c) powdered sugar (d) a big sugar cube
25. 25.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
26. 26.📘 Every push has an equal push in the opposite direction. Which toy shows this? (a) a fridge magnet (b) a mirror (c) a balloon rocket (d) a sundial
27. 27.🛟 Which rule keeps you safe when working with sunlight? (a) never look at the Sun (b) stare at the Sun (c) look at it in a mirror (d) look at it through glass
28. 28.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) brightness of rainbow (b) the same white paper (c) the amount of water
29. 29.🧺 Do we need a balloon for the coloured flower experiment? (a) needed (b) not needed
30. 30.📘 Air presses on everything around us. What is this push called? (a) friction (b) magnetism (c) air pressure (d) sunlight
31. 31.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a bicycle pump (c) a compass needle (d) a suction hook
32. 32.🔍 Which is the odd one out? (a) a suction hook (b) a fridge magnet (c) a medicine dropper (d) a drinking straw
33. 33.True or false: sugar does not dissolve in water. (a) False (b) True
34. 34.🔍 Which is the odd one out? (a) a misty bathroom mirror (b) making ice lollies (c) drops on a cold glass (d) dew on morning grass
35. 35.🔮 Predict: you shake oil and water hard in a closed bottle and wait. What happens? (a) they become solid (b) they separate again (c) they mix for ever (d) they turn to honey
36. 36.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: whether it floats is the one thing we change. (a) False (b) True
37. 37.🧺 Do we need a towel for spills for the float-or-sink test? (a) needed (b) not needed
38. 38.🛟 Which is the safe way to do the float-or-sink test? (a) wipe up spills at once (b) leave water on the floor (c) play near a deep pond (d) run around the tub
39. 39.⚖️ 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 time of day (b) brightness of rainbow (c) the amount of water
40. 40.🧺 Which of these is needed for the water rainbow? (a) yeast (b) a magnet (c) a sunny window (d) a mirror

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