Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 54 · 40 questions

What you do (Find the experiment, use the idea): 1. Read the question and find its experiment. 2. Use that experiment’s science idea. 3. For a fair test: one thing changed, the rest kept the same, one thing measured. 4. For safety: an adult helps, nothing goes in the mouth, no heat, sharp tools or plug points for children.

1. 1.🔮 Predict: you wet the comb before trying again. What happens? (a) it works better (b) it becomes a magnet (c) it hardly works (d) it lights up
2. 2.🛟 Does an empty capped bottle float or sink in water? (a) sinks (b) floats
3. 3.True or false: a coin floats on water. (a) False (b) True
4. 4.🧺 Which of these is needed for the water rainbow? (a) yeast (b) a sheet of white paper (c) a magnet (d) a mirror
5. 5.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) on top of the oil (b) at the very bottom (c) in the oil layer (d) in the water layer
6. 6.True or false: a coin is less dense than water. (a) False (b) True
7. 7.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “sun or shade”? (a) we keep it the same (b) we change it (c) we measure it
8. 8.🧺 Do we need a battery cell for the periscope? (a) not needed (b) needed
9. 9.💧 Which change is this: a puddle drying up? (a) evaporation (b) freezing (c) melting (d) condensation
10. 10.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “how many drops form”? (a) we change it (b) we keep it the same (c) we measure it
11. 11.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic chess set (c) a vacuum cleaner (d) a fridge magnet
12. 12.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: time to make butter is the one thing we change. (a) True (b) False
13. 13.🔍 Which is the odd one out? (a) chalk powder (b) cooking oil (c) baking soda (d) sand
14. 14.🧺 Do we need a battery cell for the water cycle bowl? (a) not needed (b) needed
15. 15.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 12 seconds?
16. 16.🧺 Which of these is not needed for the magnet test? (a) a tray (b) test objects (c) a balloon (d) a results chart
17. 17.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) a 30 cm ruler (c) coins of one kind (d) a round pencil
18. 18.🧺 Which of these is needed for the paper helicopter? (a) a battery cell (b) a balloon (c) a magnet (d) a strip of paper
19. 19.⚖️ 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 “how much of each liquid”? (a) we change it (b) we measure it (c) we keep it the same
20. 20.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sugar (d) sunlight
21. 21.⚖️ Fair test — does rubbing the comb more times pick up more paper bits? True or false: paper bits picked up is kept the same. (a) True (b) False
22. 22.🧺 Three of these are needed for the magnet test. Which one is NOT needed? (a) a results chart (b) a tray (c) a battery cell (d) a bar magnet
23. 23.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) turmeric powder (c) a glass of water (d) a stiff postcard
24. 24.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the way we turn it is the one thing we change. (a) True (b) False
25. 25.True or false: a small bowl is not needed for sprouting seeds. (a) True (b) False
26. 26.🚀 Which of these goes forward? (a) water a swimmer pushes (b) water from the oars (c) the rowing boat (d) air from the balloon
27. 27.⚖️ Fair test — which kind of ball bounces highest? What do we do with “the floor surface”? (a) we keep it the same (b) we change it (c) we measure it
28. 28.🧺 Which of these is needed for the fizzy balloon? (a) a comb (b) a magnet (c) a battery cell (d) baking soda
29. 29.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “where the pencil is”? (a) we measure it (b) we keep it the same (c) we change it
30. 30.⚖️ 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 keep it the same (c) we measure it
31. 31.🌈 In VIBGYOR, what number colour is indigo?
32. 32.🧺 Which of these is not needed for the coloured flower experiment? (a) a battery cell (b) a glass of water (c) a white flower (d) a few hours of waiting
33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we keep it the same (c) we measure it
34. 34.🧺 Which of these is needed for the balloon rocket? (a) a battery cell (b) a magnet (c) a balloon (d) yeast
35. 35.🧺 Which of these is not needed for the water rainbow? (a) a sheet of white paper (b) bright sunlight (c) a clear glass of water (d) a battery cell
36. 36.True or false: yeast is not needed for the muddy water filter. (a) True (b) False
37. 37.True or false: a zigzag-folded sheet makes a strong bridge. (a) False (b) True
38. 38.🚀 Which of these goes backward? (a) the balloon (b) water a swimmer pushes (c) the rowing boat (d) the rocket
39. 39.🔍 Which is the odd one out? (a) a rough wooden board (b) black cloth (c) a mirror (d) a dull brick
40. 40.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to splash everyone (b) to hide the corks (c) to win a prize (d) to keep children safe

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