Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 30 · 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.🍯 Is a pebble denser or less dense than water? (a) less dense than water (b) denser than water
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we measure it (b) we keep it the same (c) we change it
3. 3.🫗 Why does cooking oil float on top of water? (a) oil is less dense (b) oil is heavier (c) oil is sticky (d) oil is hot
4. 4.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) lemon juice (c) plain water (d) detergent water
5. 5.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a magnet (b) a results table (c) a tub of water (d) a towel for spills
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a small paper cup (c) a pencil (d) a mirror
7. 7.🔮 A ball of clay sinks. What happens if you press it into a thin boat shape? (a) it sinks faster (b) it turns to stone (c) it can float (d) it dissolves
8. 8.True or false: a magnet is not needed for the water cycle bowl. (a) True (b) False
9. 9.🔍 Which is the odd one out? (a) a safety pin (b) a glass marble (c) a copper wire (d) a wooden pencil
10. 10.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the same bottles (b) size of the balloon (c) the water temperature (d) the amount of water
11. 11.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) the bottle is magnetic (c) water is hiding there (d) air inside pushes back
12. 12.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it turns yellow (c) it grows very little (d) it grows much faster
13. 13.🛟 While watching shadows outdoors, what must you never do? (a) sit in the shade (b) look straight at the Sun (c) mark with chalk (d) wear a cap
14. 14.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) turmeric powder (c) a pencil (d) a battery cell
15. 15.🔍 Which is the odd one out? (a) a pebble (b) very salty water (c) cooking oil (d) a coin
16. 16.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) snow falling (b) a small rainbow (c) a magnet (d) a shadow of ice
17. 17.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the same light is kept the same. (a) False (b) True
18. 18.🛟 What should you do after touching soil or seeds? (a) rub your eyes (b) skip washing (c) wash your hands (d) lick your fingers
19. 19.True or false: sunlight is needed for the water cycle bowl. (a) True (b) False
20. 20.⚖️ 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
21. 21.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a bicycle pump (c) a suction hook (d) a fridge magnet
22. 22.🔍 Which is the odd one out? (a) a drinking straw (b) a medicine dropper (c) a suction hook (d) a compass needle
23. 23.🔮 Predict: the string slopes uphill. What happens? (a) it travels farther (b) it travels less far (c) it speeds up (d) it goes backward first
24. 24.⚡ A rubbed comb is held near tiny paper bits. What happens? (a) does not move (b) jumps to the comb
25. 25.🔍 Which is the odd one out? (a) a U-shaped channel (b) a flat tissue (c) rolled paper tubes (d) a zigzag-folded sheet
26. 26.📘 What do we call light bending as it passes from air into water? (a) refraction (b) magnetism (c) evaporation (d) reflection
27. 27.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a magnet (d) a 30 cm ruler
28. 28.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a bottle opener (c) a sloping road (d) a well pulley
29. 29.🔮 Predict: you make the periscope tube twice as tall. You can see over ___. (a) nothing at all (b) the ground (c) only short walls (d) taller walls
30. 30.🧺 Do we need a balloon for the water cycle bowl? (a) not needed (b) needed
31. 31.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) colour climbs up it (b) it sinks at once (c) nothing ever happens (d) it turns to plastic
32. 32.🔍 You drop a coin into a tub of water. What do you see? (a) it dissolves (b) it sinks (c) it bounces up (d) it floats
33. 33.🧲 Is a steel paper clip magnetic or non-magnetic? (a) non-magnetic (b) magnetic
34. 34.🍯 Which of these is less dense than water? (a) a pebble (b) honey (c) a coin (d) a ping-pong ball
35. 35.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) True (b) False
36. 36.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “how hard we must pull”? (a) we change it (b) we measure it (c) we keep it the same
38. 38.True or false: an empty bottle is not needed for the fizzy balloon. (a) False (b) True
39. 39.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your school uniform (c) a white party dress (d) your best clothes
40. 40.🔍 Which is the odd one out? (a) an empty capped bottle (b) a ping-pong ball (c) an iron nail (d) a dry leaf

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