Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 111 · 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.🛟 Why must a plastic bag never go over anyone’s head? (a) it changes colour (b) it is too big (c) it gets wet (d) it can block breathing
2. 2.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
3. 3.True or false: plain water is a base. (a) False (b) True
4. 4.🚀 In “push back, move forward”, which way does the rowing boat go? (a) goes forward (b) goes backward
5. 5.🔍 Which is the odd one out? (a) salt water (b) sugar water (c) orange juice (d) plain water
6. 6.🧺 Which of these is not needed for the water cycle bowl? (a) a small cup (b) a big bowl (c) cling film (d) yeast
7. 7.🌱 Is soil needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
8. 8.⚖️ 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 measure it (b) we change it (c) we keep it the same
9. 9.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the iron setting (b) how dark the writing is (c) the same cotton bud (d) the ironing time
10. 10.True or false: a drinking straw is needed for the balloon rocket. (a) False (b) True
11. 11.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
12. 12.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) a sink or a bucket (d) turmeric powder
13. 13.🧺 Do we need a magnet for making butter? (a) needed (b) not needed
14. 14.🫗 Which of these is done by sieving? (a) gravel from fine sand (b) salt from sea water (c) small stones from dal (d) husk from rice grain
15. 15.🌉 Why does a zigzag-folded sheet hold more coins than a flat one? (a) folds add glue (b) folds make it stiffer (c) folds are magnetic (d) folds make it wet
16. 16.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a rubber band (b) a clear plastic bag (c) a mirror (d) a potted plant
17. 17.🧺 Do we need turmeric powder for the coloured flower experiment? (a) needed (b) not needed
18. 18.🧺 Three of these are needed for the shadow clock. Which one is NOT needed? (a) a magnet (b) a sunny open place (c) a straight stick (d) chalk to mark shadows
19. 19.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) glue on the card (c) the cold water (d) a magnet
20. 20.🔭 How many mirrors does a simple periscope use?
21. 21.🧺 Do we need yeast for the water rainbow? (a) not needed (b) needed
22. 22.🧺 Do we need food colour for the coloured flower experiment? (a) not needed (b) needed
23. 23.🔍 Which is the odd one out? (a) a piece of foil (b) a glass marble (c) a plastic ruler (d) a paper towel
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) how far we pull it back (c) time for 10 swings
25. 25.🚁 What does the paper helicopter do as it falls? (a) it spins round (b) it turns into a ball (c) it flies upward (d) it stays still in air
26. 26.🛟 Why should we wipe up spilled oil at once? (a) oil makes it rain (b) oil turns into honey (c) spilled oil is slippery (d) oil attracts magnets
27. 27.🔍 Which is the odd one out? (a) aluminium foil (b) dark soil (c) a rough wooden board (d) black cloth
28. 28.🔮 Predict: you make more, closer zigzag folds. The bridge holds ___ coins. (a) zero (b) fewer (c) more (d) the same number of
29. 29.🔮 Predict: you stop shaking after only one minute. What do you have? (a) cheese (b) still runny cream (c) butter lumps (d) ghee
30. 30.🧺 Do we need turmeric powder for making butter? (a) needed (b) not needed
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a magnet (c) salt (d) warm water
32. 32.🧺 Do we need sugar for the fizzy balloon? (a) not needed (b) needed
33. 33.🌱 Is warmth needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
34. 34.🌱 Which of these is not needed for a seed to sprout? (a) air (b) warmth (c) soil (d) water
35. 35.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the amount poured is kept the same. (a) True (b) False
36. 36.🚁 Dropped from a raised hand, does a stone fall slowly or fast? (a) falls slowly (b) falls fast
37. 37.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
38. 38.🧺 Do we need vinegar for the static comb? (a) needed (b) not needed
39. 39.True or false: plugging in the iron is a job for an adult. (a) False (b) True
40. 40.True or false: hold up the leaves is a job of the leaves. (a) False (b) True

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