Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 94 · 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 rubbing the comb more times pick up more paper bits? True or false: the paper bit size is the one thing we change. (a) False (b) True
2. 2.🛟 Which rule keeps the density tower experiment safe? (a) do not lick the spoon (b) throw the glass (c) pour it on the floor (d) taste each layer
3. 3.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) a 30 cm ruler (c) a flat table (d) a round pencil
4. 4.🎈 When does the balloon rocket stop? (a) it never stops (b) when the air runs out (c) when it gets cold (d) when it turns blue
5. 5.🥄 Which of these does not dissolve in water? (a) glucose powder (b) food colour (c) table salt (d) small pebbles
6. 6.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a string (c) a stopwatch (d) a magnet
7. 7.🔍 Which is the odd one out? (a) sugar (b) sand (c) food colour (d) glucose powder
8. 8.True or false: turmeric powder is needed for the secret lemon message. (a) False (b) True
9. 9.True or false: “Do seeds need water to sprout?” is the question step. (a) False (b) True
10. 10.True or false: muddy water is not needed for the muddy water filter. (a) True (b) False
11. 11.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
12. 12.🔮 Predict: the string slopes uphill. What happens? (a) it goes backward first (b) it travels farther (c) it speeds up (d) it travels less far
13. 13.True or false: chaff from wheat grain is done by winnowing. (a) False (b) True
14. 14.⚖️ Fair test — does a stronger magnet pull a paper clip through more sheets of paper? True or false: sheets it pulls through is what we measure. (a) False (b) True
15. 15.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a 30 cm ruler (c) a round pencil (d) a battery cell
16. 16.🛟 What should you do after handling food colour? (a) lick your fingers (b) wipe them on walls (c) rub your eyes (d) wash your hands
17. 17.🧲 Which metal do magnets pull most strongly? (a) copper (b) aluminium (c) iron (d) gold
18. 18.True or false: yeast is needed for the ruler lever. (a) False (b) True
19. 19.🔬 In the scientific method, which step number is “ask a question”?
20. 20.🧺 Which of these is needed for the water rainbow? (a) yeast (b) a battery cell (c) turmeric powder (d) a sheet of white paper
21. 21.⚙️ Which simple machine is a sloping road? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
22. 22.⚡ A rubbed comb is held near a steel spoon. What happens? (a) does not move (b) jumps to the comb
23. 23.🍯 Is very salty water denser or less dense than water? (a) denser than water (b) less dense than water
24. 24.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a towel (c) a sink or a bucket (d) a magnet
25. 25.🛟 Coins have been touched by many hands. After the experiment you should ___. (a) lick your fingers (b) wash your hands (c) rub your eyes (d) skip washing
26. 26.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a lighter bob (c) a longer string (d) a shorter string
27. 27.True or false: plain water is an acid. (a) False (b) True
28. 28.🏗️ Which of these gets its strength from arches or domes? (a) a round pillar (b) a temple dome (c) a roof frame (d) a hollow bird bone
29. 29.🧺 Three of these are needed for the magnet test. Which one is NOT needed? (a) a tray (b) a mirror (c) test objects (d) a results chart
30. 30.🧺 Which of these is not needed for the muddy water filter? (a) sand and pebbles (b) a clean glass (c) a battery cell (d) muddy water
31. 31.🧲 Is an iron nail magnetic or non-magnetic? (a) non-magnetic (b) magnetic
32. 32.⚡ Which of these does not move to a charged comb? (a) tiny paper bits (b) dry hair (c) a heavy book (d) puffed rice
33. 33.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
34. 34.True or false: writing the message is a job a child can do. (a) False (b) True
35. 35.🔍 Which is the odd one out? (a) a heavy book (b) dry hair (c) a steel spoon (d) a brick
36. 36.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
37. 37.🧺 Do we need sand and pebbles for the muddy water filter? (a) not needed (b) needed
38. 38.🧺 Do we need a sheet of white paper for the water rainbow? (a) needed (b) not needed
39. 39.🛟 Why is a plastic jar a good choice for shaking? (a) it is magnetic (b) it is hotter (c) it is heavier (d) it will not break
40. 40.🔍 Which is the odd one out? (a) a coin (b) a glass marble (c) a pebble (d) a cork

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