Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 60 · 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.🧺 Do we need turmeric powder for the float-or-sink test? (a) needed (b) not needed
2. 2.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) halves the weight (c) makes it magnetic (d) adds weight
3. 3.🧺 Do we need a balloon for the float-or-sink test? (a) not needed (b) needed
4. 4.True or false: a steel paper clip is not pulled by a magnet. (a) True (b) False
5. 5.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the drop height is kept the same. (a) False (b) True
6. 6.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
7. 7.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we change it (b) we keep it the same (c) we measure it
8. 8.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is what we measure? (a) time for colour to show (b) the room it stands in (c) the length of the stem (d) the kind of flower
9. 9.True or false: puffed rice jumps to a charged comb. (a) False (b) True
10. 10.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is the one thing we change? (a) the amount of water (b) time to dissolve (c) the kind of sugar (d) the water temperature
11. 11.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “time to make butter”? (a) we change it (b) we measure it (c) we keep it the same
12. 12.True or false: seeds on wet cotton sprouts in a few days. (a) False (b) True
13. 13.🔬 In the scientific method, which step number is “do the experiment”?
14. 14.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
15. 15.🧺 Which of these is needed for the muddy water filter? (a) yeast (b) a funnel (c) turmeric powder (d) a magnet
16. 16.True or false: turmeric powder is needed for the coloured flower experiment. (a) False (b) True
17. 17.True or false: a white flower is needed for the coloured flower experiment. (a) True (b) False
18. 18.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it stays yellow (c) it turns blue (d) it turns green
19. 19.📘 What is a hypothesis? (a) a kind of magnet (b) a list of materials (c) a final answer (d) a testable guess
20. 20.🧺 Do we need sand and pebbles for the muddy water filter? (a) not needed (b) needed
21. 21.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a lighter bob (c) a longer string (d) a heavier bob
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) a mirror (d) a shallow dish
23. 23.🌈 In VIBGYOR, what number colour is violet?
24. 24.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns black (b) it turns red (c) it stays yellow (d) it turns blue
25. 25.True or false: a balloon is not needed for the card-on-a-glass trick. (a) False (b) True
26. 26.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
27. 27.🏗️ Where does an eggshell get its strength from? (a) triangles (b) arches and domes (c) tubes
28. 28.🔍 Which is the odd one out? (a) cutting the lemon (b) dipping the cotton bud (c) writing the message (d) reading the message
29. 29.🌉 Why does a zigzag-folded sheet hold more coins than a flat one? (a) folds make it stiffer (b) folds add glue (c) folds are magnetic (d) folds make it wet
30. 30.True or false: give out water vapour is a job of the stem. (a) True (b) False
31. 31.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same tape”? (a) we keep it the same (b) we change it (c) we measure it
32. 32.🧺 Do we need a magnet for the muddy water filter? (a) needed (b) not needed
33. 33.🧺 Which of these is not needed for the periscope? (a) sticky tape (b) two small mirrors (c) a ruler (d) turmeric powder
34. 34.🧲 Which metal do magnets pull most strongly? (a) gold (b) copper (c) iron (d) aluminium
35. 35.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) salt water (c) soap solution (d) tamarind water
36. 36.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to grow plants (c) to catch any spills (d) to cool the glass
37. 37.True or false: a coin is less dense than water. (a) False (b) True
38. 38.🔍 Which is the odd one out? (a) food colour (b) small pebbles (c) chalk powder (d) sand
39. 39.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the amount of water is kept the same. (a) False (b) True
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 10 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?

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