Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 57 · 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 the amount of water in the glass change how bright the rainbow is? True or false: brightness of rainbow is kept the same. (a) True (b) False
2. 2.🔦 Which of these is translucent? (a) a brick (b) clear glass (c) a steel plate (d) tissue paper
3. 3.True or false: vinegar is something yeast does not need. (a) False (b) True
4. 4.🔮 Predict: you make more, closer zigzag folds. The bridge holds ___ coins. (a) more (b) zero (c) the same number of (d) fewer
5. 5.🔮 A ball of clay sinks. What happens if you press it into a thin boat shape? (a) it turns to stone (b) it dissolves (c) it can float (d) it sinks faster
6. 6.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the person dropping is kept the same. (a) False (b) True
7. 7.True or false: turmeric powder is needed for the coloured flower experiment. (a) True (b) False
8. 8.🫧 What do you see when baking soda meets vinegar? (a) nothing at all (b) it glows in the dark (c) it turns to ice (d) lots of fizzy bubbles
9. 9.True or false: vinegar is needed for the periscope. (a) True (b) False
10. 10.🧺 Which of these is needed for the water rainbow? (a) a clear glass of water (b) yeast (c) a mirror (d) a battery cell
11. 11.🔍 Which is the odd one out? (a) a fluff of cotton (b) a steel spoon (c) a glass marble (d) a coin
12. 12.🔮 Predict: you keep adding sugar to a small glass of water and stirring. What happens in the end? (a) all of it dissolves (b) some stays undissolved (c) the water turns solid (d) the sugar turns to salt
13. 13.🔮 Predict: the gap between the books gets wider. The bridge holds ___. (a) more coins (b) the same coins (c) only water (d) fewer coins
14. 14.True or false: an ice-cream stick sinks in water. (a) False (b) True
15. 15.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) sugar crystals form (c) it turns to oil (d) it turns to butter
16. 16.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) the cold water (c) glue on the card (d) air pushing up
17. 17.🧺 Which of these is needed for the paper helicopter? (a) a strip of paper (b) a battery cell (c) a mirror (d) a magnet
18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) False (b) True
19. 19.⚖️ Fair test — does the angle of the mirrors change how clearly you see? Which of these is kept the same? (a) how clear the view is (b) the same carton (c) the angle of the mirrors
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
21. 21.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) dark brown words (b) blue words (c) almost nothing (d) a rainbow
22. 22.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? What do we do with “the order of the layers”? (a) we measure it (b) we keep it the same (c) we change it
23. 23.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False
24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
25. 25.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is magnetic (c) it is hotter (d) it is heavier
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a balloon (c) a small paper cup (d) string
27. 27.🔍 Which is the odd one out? (a) making ice lollies (b) water becoming ice (c) a pond icing over (d) wet clothes drying
28. 28.🎈 When does the balloon rocket stop? (a) when it turns blue (b) when it gets cold (c) when the air runs out (d) it never stops
29. 29.🥚 A fresh egg sinks in plain water. What makes it float? (a) lots of salt stirred in (b) a few ice cubes (c) a little shaking (d) more plain water
30. 30.True or false: tiny paper bits does not move to a charged comb. (a) False (b) True
31. 31.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) yeast (b) two chairs (c) a long string (d) a balloon
32. 32.True or false: a teaspoon is needed for the dissolving test. (a) False (b) True
33. 33.True or false: a balloon is not needed for the coloured flower experiment. (a) False (b) True
34. 34.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the kind of balloon is kept the same. (a) False (b) True
35. 35.True or false: a mirror is needed for the paper helicopter. (a) False (b) True
36. 36.⚖️ 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) the cling film cover (c) how many drops form
37. 37.🥛 Which of these works by magnetism? (a) a drinking straw (b) a medicine dropper (c) a magnetic pin holder (d) a vacuum cleaner
38. 38.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same window”? (a) we change it (b) we measure it (c) we keep it the same
39. 39.True or false: a magnet is needed for the turmeric test. (a) True (b) False
40. 40.🔬 How many steps are there in our scientific method (question to conclusion)?

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