Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 21 · 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.True or false: a results table is not needed for the float-or-sink test. (a) False (b) True
2. 2.🧲 Two magnets: south near north. Do they pull together or push apart? (a) push apart (b) pull together
3. 3.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a battery cell (c) yeast (d) soap solution
4. 4.🧺 Which of these is needed for the secret lemon message? (a) lemon juice (b) yeast (c) a magnet (d) a mirror
5. 5.True or false: warm water is needed for growing salt crystals. (a) False (b) True
6. 6.⚖️ Fair test — which kind of ball bounces highest? Which of these is what we measure? (a) the person dropping (b) bounce height (c) the floor surface (d) the drop height
7. 7.🫗 Why does filtered muddy water look clearer? (a) the water evaporates (b) the filter traps mud (c) the mud dissolves (d) the filter adds soap
8. 8.📘 Is the fizzing a sign that a new substance is made? (a) no, nothing changes (b) yes, a new gas forms (c) it is only dissolving (d) it is only melting
9. 9.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) sticky tape (b) a balloon (c) a magnet (d) a long string
10. 10.🛟 Who should trim the flower stem? (a) a toddler (b) a grown-up (c) anyone, without looking (d) a pet
11. 11.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “how clear the water is”? (a) we keep it the same (b) we change it (c) we measure it
12. 12.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it floats away (b) it turns brighter (c) it turns all red (d) the rainbow fades
13. 13.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) sun or shade (b) the time we wait (c) the same kind of bag (d) the size of the plant
14. 14.🧂 Which of these does not dissolve in water? (a) table salt (b) chalk powder (c) sugar (d) baking soda
15. 15.🔍 Which is the odd one out? (a) letting the paper dry (b) dipping the cotton bud (c) plugging in the iron (d) reading the message
16. 16.🔬 How many steps are there in our scientific method (question to conclusion)?
17. 17.⚖️ Fair test — which kind of ball bounces highest? True or false: the floor surface is kept the same. (a) False (b) True
18. 18.🧺 Which of these is not needed for the muddy water filter? (a) sand and pebbles (b) a funnel (c) muddy water (d) a balloon
19. 19.True or false: wet seeds by a window does not sprout. (a) True (b) False
20. 20.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the same carton is the one thing we change. (a) False (b) True
21. 21.🧂 Which of these dissolves in water? (a) sand (b) sawdust (c) table salt (d) chalk powder
22. 22.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the kind of paper”? (a) we measure it (b) we keep it the same (c) we change it
23. 23.🔮 The fizzing stops after a while. Why? (a) the balloon got cold (b) the bottle got tired (c) the gas froze (d) an ingredient ran out
24. 24.🥄 Which of these does not dissolve in water? (a) food colour (b) table salt (c) sugar (d) sand
25. 25.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) press it gently (c) flick coins at faces (d) stand on the ruler
26. 26.📘 What is the push of air on a falling thing called? (a) dissolving (b) floating (c) air resistance (d) magnetism
27. 27.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) sugar (c) turmeric powder (d) a magnet
28. 28.🧺 Which of these is needed for the periscope? (a) turmeric powder (b) vinegar (c) yeast (d) two small mirrors
29. 29.🧺 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
30. 30.🛟 Who should pour the warm water in the dissolving test? (a) a friend who is running (b) the youngest child (c) nobody needs to (d) a grown-up
31. 31.🧺 Which of these is needed for the water cycle bowl? (a) turmeric powder (b) a magnet (c) ice cubes (d) a mirror
32. 32.True or false: sticky tape is not needed for the periscope. (a) False (b) True
33. 33.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the length of the stem is the one thing we change. (a) True (b) False
34. 34.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “sun or shade”? (a) we change it (b) we measure it (c) we keep it the same
35. 35.🫗 How do we separate small stones from dal? (a) evaporating (b) winnowing (c) handpicking (d) sieving
36. 36.🧺 Which of these is not needed for the periscope? (a) a ruler (b) sticky tape (c) an empty juice carton (d) a battery cell
37. 37.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same place”? (a) we keep it the same (b) we measure it (c) we change it
38. 38.🧺 Which of these is not needed for the secret lemon message? (a) a battery cell (b) lemon juice (c) white paper (d) a small bowl
39. 39.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the kind of plant is the one thing we change. (a) True (b) False
40. 40.🧺 Which of these is not needed for the fizzy balloon? (a) a funnel or spoon (b) a tray for spills (c) sugar (d) vinegar

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