Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 113 · 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: seeds on wet cotton are kept in the freezer. What happens? (a) they grow fruit (b) they sprout faster (c) they do not sprout (d) they glow
2. 2.🧺 Do we need water for the water cycle bowl? (a) not needed (b) needed
3. 3.🛟 Why must the jar lid be screwed on tightly? (a) so it gets hot (b) so air gets out (c) so it turns yellow (d) so cream does not spill
4. 4.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the salt (b) the mud (c) nothing (d) the water
5. 5.🛟 Which of these is a safe habit? (a) working with no adult (b) reading the steps first (c) running with glassware (d) mixing random liquids
6. 6.🧺 Do we need two books for the paper bridge? (a) not needed (b) needed
7. 7.True or false: “I think seeds need water to sprout.” is the hypothesis step. (a) True (b) False
8. 8.🔮 Predict: you hold a written word up to a mirror. The letters look ___. (a) upside down only (b) much bigger (c) flipped left to right (d) in colour
9. 9.🥄 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) warm water (c) a battery cell (d) a small bottle
11. 11.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) feed them to pets (b) throw them at friends (c) eat a few to check (d) never put seeds in mouth
12. 12.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a paper clip (c) a small bottle (d) sugar
13. 13.True or false: sugar stirred well dissolves faster. (a) False (b) True
14. 14.🍯 Which of these is less dense than water? (a) a pebble (b) a coin (c) air (d) honey
15. 15.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a timer (b) cold water to rinse (c) a bowl (d) a battery cell
16. 16.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) yeast (c) coins as the load (d) a magnet
18. 18.🔍 Which is the odd one out? (a) clean water (b) a wooden board (c) your hand (d) a steel plate
19. 19.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) the weight of the bob (c) time for 10 swings
20. 20.⚖️ Fair test — which kind of ball bounces highest? What do we do with “the kind of ball”? (a) we change it (b) we keep it the same (c) we measure it
21. 21.🚁 Why does the paper helicopter fall slowly? (a) the floor pushes it (b) air pushes on its blades (c) a magnet holds it (d) it has no weight
22. 22.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is kept the same? (a) sun or shade (b) how many drops form (c) the cling film cover
23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the number of drops (c) the liquid we test (d) the turmeric paper
24. 24.🧺 Do we need a bowl for making butter? (a) not needed (b) needed
25. 25.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a small paper cup (c) a magnet (d) yeast
26. 26.True or false: chalk powder does not dissolve in water. (a) False (b) True
27. 27.⚖️ Fair test — which paper shape holds the most coins? Which of these is the one thing we change? (a) the kind of paper (b) where coins are placed (c) the gap between books (d) the shape of the paper
28. 28.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the amount poured is what we measure. (a) False (b) True
29. 29.🔍 Which is the odd one out? (a) a safety pin (b) a rubber eraser (c) an iron screw (d) an iron nail
30. 30.⚡ A rubbed comb is held near a pebble. What happens? (a) does not move (b) jumps to the comb
31. 31.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
32. 32.True or false: turmeric powder is needed for the muddy water filter. (a) True (b) False
33. 33.⚖️ Fair test — how does the shadow of a stick change through the day? True or false: the stick kept upright is kept the same. (a) True (b) False
34. 34.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a doorknob (c) a well pulley (d) a ramp
35. 35.🛟 Where is a safe place to drop the helicopter from? (a) a roof edge (b) a wobbly chair (c) from your raised hand (d) a high window ledge
36. 36.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are magnetic (c) they are too cold (d) they are too shiny
37. 37.True or false: a steel spoon jumps to a charged comb. (a) True (b) False
38. 38.🛟 Which of these floats on water? (a) an iron nail (b) a steel spoon (c) a dry leaf (d) a glass marble
39. 39.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) both the same (b) neither of them (c) the cool cloudy day (d) the hot sunny day
40. 40.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) on a bed (c) near a plug point (d) over a laptop

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