Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 121 · 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.⚡ Which of these does not move to a charged comb? (a) puffed rice (b) tiny paper bits (c) thermocol bits (d) a steel spoon
2. 2.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we measure it (b) we change it (c) we keep it the same
3. 3.🧺 Which of these is not needed for the water rainbow? (a) a sheet of white paper (b) bright sunlight (c) a clear glass of water (d) turmeric powder
4. 4.🧲 Why is an aluminium can not pulled by a magnet? (a) it has no iron in it (b) it is too shiny (c) it is too light (d) it is too cold
5. 5.💧 Which of these is condensation? (a) butter going runny (b) water becoming ice (c) making ice lollies (d) dew on morning grass
6. 6.⚖️ 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 change it (c) we measure it
7. 7.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
8. 8.🌉 Does a flat tissue make a strong or a weak bridge? (a) strong bridge (b) weak bridge
9. 9.🧺 Which of these is not needed for the dissolving test? (a) two clear glasses (b) a clock or timer (c) warm water (d) a balloon
10. 10.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) distance from the pencil (b) the same ruler (c) which side goes down
11. 11.🧺 Do we need yeast for the magnet test? (a) needed (b) not needed
12. 12.🧺 Do we need a battery cell for the paper helicopter? (a) needed (b) not needed
13. 13.True or false: a big sugar cube dissolves slower. (a) False (b) True
14. 14.🔮 A flat sheet and a crumpled ball of the same paper drop together. Which lands first? (a) neither of them (b) the flat sheet (c) a sheet of glass (d) the crumpled ball
15. 15.🔍 Which is the odd one out? (a) an ice cube (b) a ping-pong ball (c) cooking oil (d) very salty water
16. 16.⚡ Which of these jumps to a charged comb? (a) tiny paper bits (b) a brick (c) a steel spoon (d) a pebble
17. 17.🔍 What happens to a flat paper bridge with just a few coins on it? (a) it floats up (b) it gets stronger (c) it turns to card (d) it sags and falls
18. 18.🧺 Which of these is not needed for the density tower? (a) a spoon (b) cooking oil (c) a balloon (d) a tall clear glass
19. 19.🔍 What do you see after shaking cream in a jar for a long time? (a) lumps of butter (b) clear water only (c) bubbles of gas (d) sugar crystals
20. 20.🛟 What should you do after handling food colour? (a) lick your fingers (b) wipe them on walls (c) wash your hands (d) rub your eyes
21. 21.🛟 Which of these sinks in water? (a) an empty capped bottle (b) a steel spoon (c) an ice cube (d) a feather
22. 22.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) a sunny window (c) yeast (d) bright sunlight
23. 23.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are magnetic (c) they may swallow them (d) they are too shiny
24. 24.🧺 Which of these is needed for the paper helicopter? (a) a magnet (b) a balloon (c) a mirror (d) a paper clip
25. 25.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
26. 26.⚡ Which of these jumps to a charged comb? (a) thermocol bits (b) a steel spoon (c) a brick (d) a heavy book
27. 27.🫧 What do you see when baking soda meets vinegar? (a) it turns to ice (b) lots of fizzy bubbles (c) it glows in the dark (d) nothing at all
28. 28.⚖️ Fair test — which kind of ball bounces highest? True or false: the drop height is kept the same. (a) False (b) True
29. 29.True or false: asking an adult first is an unsafe habit. (a) False (b) True
30. 30.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the water turns to ice (c) the card stays on (d) the card flies away
31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the number of drops (c) the liquid we test (d) the colour we see
32. 32.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) yes, they sprout (b) no, never (c) they melt (d) they turn to stones
33. 33.🧺 Which of these is not needed for the leafy bag test? (a) a potted plant (b) sunlight (c) a clear plastic bag (d) vinegar
34. 34.🧺 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 small bowl (d) a battery cell
35. 35.🛟 What should you do after handling muddy water? (a) wipe hands on face (b) lick your fingers (c) wash hands afterwards (d) nothing is needed
36. 36.🛟 Which is a safe rule for the balloon rocket? (a) blow it till it bursts (b) keep it away from faces (c) aim it at your friend (d) put string round a neck
37. 37.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) one swing is too slow (c) it is more accurate (d) 10 is a lucky number
38. 38.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “the same carton”? (a) we measure it (b) we keep it the same (c) we change it
39. 39.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is kept the same? (a) the shape of the clay (b) the tub of water (c) whether it floats
40. 40.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) on top of the oil (b) in the water layer (c) in the oil layer (d) at the very bottom

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