Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 3 · 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.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a magnet (c) water (d) white paper strips
2. 2.⚖️ 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 what we measure. (a) False (b) True
3. 3.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
4. 4.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
5. 5.🧺 Do we need a magnet for the paper bridge? (a) needed (b) not needed
6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) True (b) False
7. 7.🛟 Who should use the hot iron in the secret message experiment? (a) only an adult (b) whoever is fastest (c) any child (d) the youngest child
8. 8.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) False (b) True
9. 9.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a mirror (b) a white flower (c) a few hours of waiting (d) a glass of water
10. 10.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) nothing (b) the water (c) the salt (d) the mud
11. 11.True or false: a coin is less dense than water. (a) True (b) False
12. 12.🔍 What do you see a day after a white flower stands in blue water? (a) the stem turns to ice (b) the flower floats away (c) the water turns green (d) the petals turn bluish
13. 13.🛟 What should you wear for a long time in the hot sun? (a) nothing on your head (b) a cap or hat (c) a raincoat (d) a woollen sweater
14. 14.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) the kind of seeds (b) how many seeds sprout (c) the number of seeds (d) wet or dry cotton
15. 15.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “how hard we shake”? (a) we measure it (b) we keep it the same (c) we change it
16. 16.🥄 Does sugar left unstirred dissolve faster or slower? (a) faster (b) slower
17. 17.True or false: vinegar is needed for the balloon rocket. (a) True (b) False
18. 18.🔮 Predict: you rub a balloon on dry hair and hold it on a wall. What happens? (a) it falls straight down (b) it bursts at once (c) it turns into water (d) it sticks for a while
19. 19.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) the same ruler (b) which side goes down (c) the kind of coins (d) distance from the pencil
20. 20.🔬 Which step of the scientific method is this: “Only the wet-cotton seeds sprouted.” (a) hypothesis (b) experiment (c) observation (d) conclusion
21. 21.🛟 Why should we wipe up spilled oil at once? (a) oil makes it rain (b) oil turns into honey (c) oil attracts magnets (d) spilled oil is slippery
22. 22.🧺 Which of these is not needed for the paper bridge? (a) a ruler (b) a battery cell (c) coins (d) two books
23. 23.🧺 Which of these is needed for the muddy water filter? (a) a battery cell (b) a magnet (c) a mirror (d) a clean glass
24. 24.True or false: a balloon is not needed for the coloured flower experiment. (a) False (b) True
25. 25.🧭 Which tool uses a magnet to find directions? (a) a periscope (b) a sundial (c) a compass (d) a pulley
26. 26.🧺 Which of these is needed for the balloon rocket? (a) yeast (b) sticky tape (c) a mirror (d) a magnet
27. 27.True or false: honey is denser than water. (a) True (b) False
28. 28.💧 Which of these lets water climb up it? (a) a steel spoon (b) a rubber eraser (c) a cotton thread (d) a glass marble
29. 29.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) easier (c) harder (d) the same
30. 30.True or false: your hand is opaque. (a) True (b) False
31. 31.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we measure it (b) we keep it the same (c) we change it
32. 32.🔍 Which is the odd one out? (a) a cotton thread (b) a glass marble (c) a plastic ruler (d) a rubber eraser
33. 33.🧺 Which of these is not needed for the float-or-sink test? (a) a tub of water (b) a towel for spills (c) a results table (d) a magnet
34. 34.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) yeast (b) a towel for spills (c) a results table (d) small test objects
35. 35.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we change it (b) we measure it (c) we keep it the same
36. 36.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a timer (b) a jar with a tight lid (c) cold water to rinse (d) a balloon
37. 37.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a ruler (c) turmeric powder (d) a battery cell
38. 38.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
39. 39.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a clock or timer (b) sugar (c) two clear glasses (d) a mirror
40. 40.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the ironing time is kept the same. (a) False (b) True

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