Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 42 · 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: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) neither of them (b) both the same (c) the sugar cube (d) powdered sugar
2. 2.🧺 Do we need a battery cell for the float-or-sink test? (a) needed (b) not needed
3. 3.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a pencil and tape (c) a mirror (d) a heavy nut or washer
4. 4.🧺 Which of these is needed for the paper bridge? (a) a magnet (b) a battery cell (c) sheets of paper (d) turmeric powder
5. 5.🧺 Do we need two chairs for the balloon rocket? (a) needed (b) not needed
6. 6.🔍 How can you get the salt back from salty water? (a) let the water evaporate (b) add more water (c) keep it in a fridge (d) stir it more
7. 7.True or false: a few hours of waiting is not needed for the coloured flower experiment. (a) True (b) False
8. 8.🫗 How do we separate mud from water? (a) evaporating (b) handpicking (c) filtering (d) sieving
9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) False (b) True
10. 10.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) lemon juice (c) a cotton bud (d) a balloon
11. 11.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) warm water (c) yeast (d) a battery cell
12. 12.🛟 Why should we wipe up spilled oil at once? (a) spilled oil is slippery (b) oil attracts magnets (c) oil turns into honey (d) oil makes it rain
13. 13.True or false: yeast is not needed for the pendulum. (a) False (b) True
14. 14.True or false: vinegar is needed for the balloon rocket. (a) True (b) False
15. 15.🧺 Which of these is not needed for the water rainbow? (a) a sheet of white paper (b) a clear glass of water (c) a sunny window (d) a mirror
16. 16.🚀 In “push back, move forward”, which way does the balloon go? (a) goes backward (b) goes forward
17. 17.🧺 Do we need a battery cell for the balloon rocket? (a) needed (b) not needed
18. 18.🔍 Which is the odd one out? (a) a brick (b) thermocol bits (c) tiny paper bits (d) dry hair
19. 19.⚖️ What is the turning point of a lever called? (a) the load (b) the effort (c) the fulcrum (d) the axle
20. 20.🚁 Dropped from a raised hand, does a fluff of cotton fall slowly or fast? (a) falls slowly (b) falls fast
21. 21.True or false: turmeric powder is needed for the periscope. (a) False (b) True
22. 22.🛟 How should you store bar magnets? (a) in pairs, opposite ends (b) dropped on the floor (c) in a hot oven (d) loose in a toy box
23. 23.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a magnet (b) water (c) cling film (d) ice cubes
24. 24.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a strip of paper (b) a battery cell (c) safety scissors (d) a ruler
25. 25.True or false: a battery cell is needed for the leafy bag test. (a) False (b) True
26. 26.True or false: plugging in the iron is a job a child can do. (a) False (b) True
27. 27.True or false: a battery cell is needed for the fizzy balloon. (a) False (b) True
28. 28.⚖️ Fair test — does rubbing the comb more times pick up more paper bits? True or false: the same hair is kept the same. (a) True (b) False
29. 29.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is the one thing we change? (a) the number of coins (b) where the pencil is (c) the same ruler (d) distance from the pencil
30. 30.🔍 Which is the odd one out? (a) one flat sheet (b) paper with folded edges (c) a torn flat sheet (d) a flat tissue
31. 31.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same straw”? (a) we keep it the same (b) we measure it (c) we change it
32. 32.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
33. 33.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) blue words (b) a rainbow (c) dark brown words (d) almost nothing
34. 34.⚖️ Fair test — which paper shape holds the most coins? What do we do with “the gap between books”? (a) we keep it the same (b) we change it (c) we measure it
35. 35.🔍 Which is the odd one out? (a) a glass marble (b) very salty water (c) air (d) a coin
36. 36.🔮 Predict: you hold a written word up to a mirror. The letters look ___. (a) upside down only (b) much bigger (c) in colour (d) flipped left to right
37. 37.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) bright blue (c) white at once (d) reddish
38. 38.True or false: “Warm took 1 minute, cold took 4.” is the observation step. (a) False (b) True
39. 39.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is the one thing we change. (a) False (b) True

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