Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 110 · 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 of these is done by winnowing? (a) bran from wheat flour (b) tea leaves from tea (c) sugar from sugar water (d) chaff from wheat grain
2. 2.🧺 Do we need a clean glass for the muddy water filter? (a) needed (b) not needed
3. 3.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) coins of one kind (c) a 30 cm ruler (d) a flat table
4. 4.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they all turn green (b) they stay white (c) they fall off at once (d) they turn two colours
5. 5.True or false: a bowl is needed for making butter. (a) False (b) True
6. 6.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) it turns to cheese (b) more butter forms (c) no butter forms (d) it turns blue
7. 7.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a mirror (c) a balloon (d) coins of one kind
8. 8.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
9. 9.True or false: dew on morning grass is evaporation. (a) False (b) True
10. 10.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) red (b) violet (c) orange (d) yellow
11. 11.True or false: glucose powder does not dissolve in water. (a) True (b) False
12. 12.🧺 Which of these is needed for the fizzy balloon? (a) a magnet (b) a mirror (c) a tray for spills (d) sugar
13. 13.🔍 Which is the odd one out? (a) butter going runny (b) snow turning to water (c) drops on a cold glass (d) ice becoming water
14. 14.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
15. 15.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) turmeric powder (c) a small bottle (d) a battery cell
16. 16.⚖️ 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 “how much of each liquid”? (a) we change it (b) we keep it the same (c) we measure it
17. 17.🍋 Which of these steps is a job for an adult? (a) letting the paper dry (b) reading the message (c) cutting the lemon (d) dipping the cotton bud
18. 18.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) distance it travels (b) how big we blow it (c) the same tape (d) the same straw
19. 19.🌱 Will these sprout: boiled seeds? (a) does not sprout (b) sprouts
20. 20.🔍 Which is the odd one out? (a) dipping the cotton bud (b) cutting the lemon (c) ironing the paper (d) plugging in the iron
21. 21.🧲 Which of these pull together? (a) south near south (b) south near north (c) north near north
22. 22.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
23. 23.🛟 What should you do if vinegar splashes in your eye? (a) rub it hard (b) rinse with clean water (c) add baking soda (d) ignore it
24. 24.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) sugar (c) vinegar (d) an empty bottle
25. 25.True or false: a tray for spills is needed for the fizzy balloon. (a) False (b) True
26. 26.⚖️ Fair test — which kind of ball bounces highest? What do we do with “the person dropping”? (a) we change it (b) we measure it (c) we keep it the same
27. 27.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
28. 28.🧺 Which of these is not needed for the paper bridge? (a) two books (b) a ruler (c) a balloon (d) coins
29. 29.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) salt crystals (b) tiny insects (c) nothing at all (d) tiny water drops
30. 30.True or false: bad grains from rice is done by filtering. (a) False (b) True
31. 31.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold makes it pink (c) cold slows yeast down (d) cold kills sugar
32. 32.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a battery cell (b) a dropper or spoon (c) lemon juice (d) white paper strips
33. 33.🧺 Which of these is needed for the secret lemon message? (a) lemon juice (b) turmeric powder (c) a balloon (d) a battery cell
34. 34.🧺 Which of these is needed for the paper helicopter? (a) yeast (b) a ruler (c) a magnet (d) a mirror
35. 35.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
36. 36.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) few or no crystals (d) it fizzes
37. 37.🪴 Which of these is a job of the roots? (a) carry water upward (b) make seeds (c) hold the plant in soil (d) make food in sunlight
38. 38.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it is magnetic (d) it could fall on you
39. 39.🧺 Which of these is not needed for the fizzy balloon? (a) a seed (b) vinegar (c) baking soda (d) a balloon
40. 40.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the number of coins”? (a) we measure it (b) we keep it the same (c) we change it

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