Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 105 · 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 change is this: drops on a cold glass? (a) freezing (b) melting (c) condensation (d) evaporation
2. 2.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap is magnetic (c) soap water is a base (d) soap is an acid
3. 3.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a battery cell (b) cotton wool (c) water (d) a small bowl
4. 4.True or false: a battery cell is needed for the float-or-sink test. (a) False (b) True
5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) True (b) False
6. 6.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) salt (d) time
7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we keep it the same (c) we measure it
8. 8.True or false: seeds on dry cotton does not sprout. (a) True (b) False
9. 9.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
10. 10.🔮 Predict: wet clothes are hung out on a sunny, windy day. How do they dry? (a) faster (b) they never dry (c) slower (d) they turn to ice
11. 11.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
12. 12.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the way we turn it is kept the same. (a) False (b) True
13. 13.🧺 Which of these is needed for the muddy water filter? (a) turmeric powder (b) yeast (c) muddy water (d) a battery cell
14. 14.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same glass”? (a) we change it (b) we keep it the same (c) we measure it
15. 15.🔍 Which is the odd one out? (a) a zigzag-folded sheet (b) a U-shaped channel (c) a flat tissue (d) rolled paper tubes
16. 16.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is heavier (c) it will not break (d) it is hotter
17. 17.⚖️ Fair test — how does the shadow of a stick change through the day? What do we do with “the stick kept upright”? (a) we change it (b) we measure it (c) we keep it the same
18. 18.🌈 Why does sunlight make a rainbow through a glass of water? (a) water splits the light (b) the paper makes colours (c) the water is coloured (d) the glass is painted
19. 19.⚖️ Fair test — how does the shadow of a stick change through the day? What do we do with “shadow length”? (a) we measure it (b) we keep it the same (c) we change it
20. 20.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) both go up (b) the left side (c) neither, it balances (d) the right side
21. 21.🫗 Why does cooking oil float on top of water? (a) oil is hot (b) oil is less dense (c) oil is sticky (d) oil is heavier
22. 22.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a towel for spills (b) a tub of water (c) turmeric powder (d) a results table
23. 23.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is kept the same? (a) distance it travels (b) how big we blow it (c) the same string
24. 24.🔍 You drop a coin into a tub of water. What do you see? (a) it bounces up (b) it dissolves (c) it floats (d) it sinks
25. 25.🔍 Which is the odd one out? (a) tiny paper bits (b) thermocol bits (c) a pebble (d) puffed rice
26. 26.🍯 Which of these is less dense than water? (a) very salty water (b) honey (c) a glass marble (d) cooking oil
27. 27.True or false: a magnet is not needed for the pendulum. (a) True (b) False
28. 28.🧺 Do we need a plastic comb for the static comb? (a) not needed (b) needed
29. 29.🛟 Who should cut the holes in the juice carton? (a) nobody needs to (b) the youngest child (c) a friend who is running (d) a grown-up
30. 30.⚖️ Fair test — which kind of ball bounces highest? Which of these is what we measure? (a) the floor surface (b) bounce height (c) the drop height (d) the kind of ball
31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) how hard we must pull (c) the same cup of coins (d) number of pulleys
32. 32.True or false: sugar does not dissolve in water. (a) True (b) False
33. 33.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a fridge magnet (c) a drinking straw (d) a medicine dropper
34. 34.True or false: a few hours of waiting is needed for the coloured flower experiment. (a) False (b) True
35. 35.True or false: a balloon is needed for the float-or-sink test. (a) True (b) False
36. 36.🧺 Which of these is needed for the shadow clock? (a) a balloon (b) a magnet (c) a straight stick (d) a battery cell
37. 37.🚁 Why do we clip a paper clip to the bottom of the helicopter? (a) to make it fall slower (b) to weigh down the bottom (c) to make it magnetic (d) to stop the spinning
38. 38.🛟 While watching shadows outdoors, what must you never do? (a) look straight at the Sun (b) sit in the shade (c) mark with chalk (d) wear a cap
39. 39.🔍 Which is the odd one out? (a) a feather (b) a ping-pong ball (c) a cork (d) a ball of clay
40. 40.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of yeast (b) the water temperature (c) size of the balloon

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