Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 83 · 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.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is what we measure? (a) the kind of flower (b) the length of the stem (c) the amount of water (d) time for colour to show
2. 2.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) near a plug point (c) over a sink or bucket (d) over a laptop
3. 3.🧺 Three of these are needed for the paper bridge. Which one is NOT needed? (a) a balloon (b) sheets of paper (c) coins (d) a ruler
4. 4.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a pencil (b) a strip of paper (c) a paper clip (d) a mirror
5. 5.📘 What is water vapour? (a) tiny ice cubes (b) salty water (c) water as a gas (d) a kind of smoke
6. 6.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) on top of the oil (b) in the oil layer (c) in the water layer (d) at the very bottom
7. 7.🚀 Which of these goes backward? (a) the balloon (b) the swimmer (c) gas from the rocket (d) the rocket
8. 8.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: amount of water drops is what we measure. (a) True (b) False
9. 9.⚖️ Fair test — how does the shadow of a stick change through the day? What do we do with “the same stick”? (a) we change it (b) we keep it the same (c) we measure it
10. 10.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is the one thing we change? (a) the same card (b) whether the card stays (c) the same glass (d) how full the glass is
11. 11.True or false: a magnet is needed for the float-or-sink test. (a) True (b) False
12. 12.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we change it (b) we measure it (c) we keep it the same
13. 13.🛟 Which rule keeps you safe when working with sunlight? (a) look at it through glass (b) stare at the Sun (c) look at it in a mirror (d) never look at the Sun
14. 14.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the kind of flower is kept the same. (a) False (b) True
15. 15.🫧 Is plain water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
16. 16.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
17. 17.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a glass of water (c) a balloon (d) yeast
18. 18.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) turmeric powder (b) a small bowl (c) a cotton bud (d) lemon juice
19. 19.True or false: a few hours of waiting is not needed for the coloured flower experiment. (a) True (b) False
20. 20.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a drinking straw (b) a long string (c) two chairs (d) a mirror
21. 21.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the cling film cover is the one thing we change. (a) True (b) False
22. 22.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) bright blue (c) reddish-brown (d) green
23. 23.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a ruler (c) a pencil and tape (d) a balloon
24. 24.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) there is no change (b) it shrinks (c) it turns blue (d) it grows bigger
25. 25.🧺 Which of these is needed for the periscope? (a) a pencil (b) a balloon (c) a magnet (d) yeast
26. 26.🧺 Three of these are needed for the shadow clock. Which one is NOT needed? (a) a clock to check (b) a straight stick (c) a sunny open place (d) a magnet
27. 27.⚖️ Fair test — does rubbing the comb more times pick up more paper bits? What do we do with “the same hair”? (a) we keep it the same (b) we measure it (c) we change it
28. 28.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) clearer (b) salty (c) hot (d) muddier
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the amount of salt (b) the same dish (c) sunny or shady place (d) days to see crystals
30. 30.🔍 Which is the odd one out? (a) clean water (b) frosted glass (c) air (d) clear plastic film
31. 31.⚖️ Fair test — which kind of ball bounces highest? Which of these is kept the same? (a) the floor surface (b) the kind of ball (c) bounce height
32. 32.🛟 Why should you not over-blow the balloon? (a) it can pop loudly (b) it gets too heavy (c) it turns into a kite (d) it changes colour
33. 33.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) nail (c) battery (d) magnet
34. 34.True or false: turmeric powder is needed for the secret lemon message. (a) True (b) False
35. 35.True or false: a balloon is not needed for the water rainbow. (a) False (b) True
36. 36.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a few hours (b) a potted plant (c) yeast (d) a clear plastic bag
37. 37.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) the weight of the bob
38. 38.True or false: make food in sunlight is a job of the leaves. (a) True (b) False
39. 39.📘 What pulls the paper helicopter down to the floor? (a) the wind (b) air pressure (c) magnetism (d) gravity
40. 40.🧺 Which of these is needed for the fizzy balloon? (a) a seed (b) an empty bottle (c) a mirror (d) a battery cell

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