Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 23 · 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 move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) harder (c) easier (d) impossible
2. 2.True or false: a tap handle is a wheel and axle. (a) False (b) True
3. 3.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
4. 4.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) the kind of seeds (b) how many seeds sprout (c) wet or dry cotton
5. 5.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the same muddy water (b) the filter material (c) the amount poured (d) the same glass
6. 6.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same funnel is kept the same. (a) True (b) False
7. 7.True or false: the rocket goes backward. (a) False (b) True
8. 8.🔍 Which is the odd one out? (a) a pebble (b) very salty water (c) cooking oil (d) a glass marble
9. 9.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) water (b) a big bowl (c) turmeric powder (d) a small cup
10. 10.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same tape”? (a) we measure it (b) we change it (c) we keep it the same
11. 11.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) bright sunlight (c) a sheet of white paper (d) a battery cell
12. 12.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the same carton is what we measure. (a) False (b) True
13. 13.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the amount of water”? (a) we keep it the same (b) we measure it (c) we change it
14. 14.🫗 Which of these is done by winnowing? (a) chaff from wheat grain (b) sugar from sugar water (c) salt from sea water (d) bran from wheat flour
15. 15.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it stays the same (c) it halves (d) it becomes 4 times
16. 16.🔬 In the scientific method, which step number is “observe and record”?
17. 17.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) no, never (b) they turn to stones (c) yes, they sprout (d) they melt
18. 18.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
19. 19.🔍 Which is the odd one out? (a) tamarind water (b) salt water (c) vinegar (d) curd
20. 20.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a magnet (b) a balloon (c) sticky tape (d) a drinking straw
21. 21.🛟 What should you do with wet floors after the experiment? (a) wipe them dry (b) slide on them (c) pour more water (d) leave them wet
22. 22.🌈 In VIBGYOR, what number colour is violet?
23. 23.True or false: cooking oil is not needed for the density tower. (a) True (b) False
24. 24.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is kept the same? (a) the amount of sugar (b) the water temperature (c) time to dissolve
25. 25.🧺 Which of these is not needed for the secret lemon message? (a) a small bowl (b) lemon juice (c) a mirror (d) white paper
26. 26.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
27. 27.True or false: a see-saw is an inclined plane. (a) False (b) True
28. 28.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a medicine dropper (c) a magnetic chess set (d) a compass needle
29. 29.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a magnet (b) a shadow of ice (c) a small rainbow (d) snow falling
30. 30.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a mirror (c) a round pencil (d) a magnet
31. 31.🧺 Three of these are needed for the static comb. Which one is NOT needed? (a) tiny paper bits (b) dry hair (c) a balloon (d) a magnet
32. 32.🔮 The fizzing stops after a while. Why? (a) the balloon got cold (b) the bottle got tired (c) the gas froze (d) an ingredient ran out
33. 33.🔍 Which is the odd one out? (a) paper with folded edges (b) rolled paper tubes (c) a U-shaped channel (d) a torn flat sheet
34. 34.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same string is what we measure. (a) False (b) True
35. 35.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the paper clip”? (a) we change it (b) we measure it (c) we keep it the same
36. 36.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
37. 37.🫧 Which of these is an acid? (a) detergent water (b) sugar water (c) plain water (d) vinegar
38. 38.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is the one thing we change? (a) the stirring (b) the amount of sugar (c) the water temperature (d) the kind of sugar
39. 39.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
40. 40.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “the angle of the mirrors”? (a) we change it (b) we keep it the same (c) we measure it

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