Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 98 · 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 coloured flower experiment. Which one is NOT needed? (a) a white flower (b) a magnet (c) food colour (d) a glass of water
2. 2.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) it stays white (c) green (d) reddish-brown
3. 3.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
4. 4.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) quicker (d) stopped
5. 5.🧲 Which of these is pulled by a magnet? (a) an aluminium can (b) iron filings (c) a glass marble (d) a rubber eraser
6. 6.🧺 Which of these is needed for making butter? (a) fresh cream (b) a battery cell (c) yeast (d) turmeric powder
7. 7.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) it turns to salt (b) the water increases (c) some water evaporates (d) it turns to ice
8. 8.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) rope (c) nail (d) battery
9. 9.🔭 Who uses a periscope to look above the water? (a) a pilot in a plane (b) a farmer (c) a baker (d) a submarine crew
10. 10.🔮 Predict: you hold a written word up to a mirror. The letters look ___. (a) flipped left to right (b) in colour (c) upside down only (d) much bigger
11. 11.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a small bowl (b) moong seeds (c) a battery cell (d) water
12. 12.🧺 Which of these is not needed for the periscope? (a) a pencil (b) two small mirrors (c) a battery cell (d) a ruler
13. 13.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the same jar (b) how hard we shake (c) the amount of cream (d) time to make butter
14. 14.🧺 Do we need an empty bottle for the fizzy balloon? (a) not needed (b) needed
15. 15.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a balloon (b) a sink or a bucket (c) a towel (d) a glass of water
16. 16.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the rope gets shorter (c) the bucket floats (d) water gets lighter
17. 17.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a balloon (b) water with food colour (c) a tall clear glass (d) cooking oil
18. 18.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) salt crystals form (c) it turns to butter (d) it turns to oil
19. 19.🧺 Do we need a glass of water for the coloured flower experiment? (a) needed (b) not needed
20. 20.⚖️ Fair test — does a stronger magnet pull a paper clip through more sheets of paper? What do we do with “the same paper clip”? (a) we change it (b) we measure it (c) we keep it the same
21. 21.🔮 A cork floats in tap water. What happens in very salty water? (a) it still floats (b) it sinks (c) it dissolves (d) it turns white
22. 22.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) a stiff postcard (c) a glass of water (d) yeast
23. 23.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “time to make butter”? (a) we measure it (b) we change it (c) we keep it the same
24. 24.🔍 Which is the odd one out? (a) detergent water (b) lemon juice (c) vinegar (d) curd
25. 25.⚖️ Fair test — which kind of ball bounces highest? True or false: the floor surface is the one thing we change. (a) True (b) False
26. 26.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is magnetic (c) it is heavier (d) it will not break
27. 27.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) water (c) yeast (d) white paper strips
28. 28.🧺 Which of these is needed for the balloon rocket? (a) a battery cell (b) turmeric powder (c) a mirror (d) a balloon
29. 29.🛟 Before starting any experiment, what is the first safety step? (a) ask an adult (b) start right away (c) hide it from adults (d) skip the reading
30. 30.True or false: detergent water is a base. (a) True (b) False
31. 31.🧺 Three of these are needed for the shadow clock. Which one is NOT needed? (a) a straight stick (b) a clock to check (c) a battery cell (d) chalk to mark shadows
32. 32.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) both the same (b) the sugar cube (c) powdered sugar (d) neither of them
33. 33.🧺 Do we need a few hours of waiting for the coloured flower experiment? (a) not needed (b) needed
34. 34.🔦 Which of these is opaque? (a) clean water (b) frosted glass (c) butter paper (d) your hand
35. 35.🔍 Which is the odd one out? (a) air (b) sugar (c) water (d) warmth
36. 36.🔮 Predict: you stop shaking after only one minute. What do you have? (a) cheese (b) ghee (c) butter lumps (d) still runny cream
37. 37.🛟 Who should use the hot iron in the secret message experiment? (a) only an adult (b) whoever is fastest (c) the youngest child (d) any child
38. 38.⚖️ Fair test — do seeds need water to sprout? True or false: the number of seeds is kept the same. (a) True (b) False
39. 39.🌈 In VIBGYOR, what number colour is indigo?
40. 40.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed

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