Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 107 · 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 cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) the cream temperature (b) the amount of cream (c) time to make butter
2. 2.🧲 Two magnets: north near south. Do they pull together or push apart? (a) push apart (b) pull together
3. 3.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
4. 4.🫧 Which of these is neutral? (a) soap solution (b) orange juice (c) tamarind water (d) sugar water
5. 5.🔮 Predict: you fold the two blades the other way. What changes? (a) it does not fall (b) it falls upward (c) it turns blue (d) it spins the other way
6. 6.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same glass”? (a) we change it (b) we keep it the same (c) we measure it
7. 7.True or false: food colour is not needed for the coloured flower experiment. (a) True (b) False
8. 8.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a balloon (b) a funnel (c) cotton or cloth (d) a clean glass
9. 9.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a results table (b) a tub of water (c) a towel for spills (d) turmeric powder
10. 10.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a results table (b) a towel for spills (c) a mirror (d) a tub of water
11. 11.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
12. 12.🔍 Which is the odd one out? (a) snow turning to water (b) sweat drying on skin (c) butter going runny (d) ice becoming water
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we change it (c) we measure it
14. 14.🧺 Do we need a plastic comb for the static comb? (a) not needed (b) needed
15. 15.🔍 Which is the odd one out? (a) plain water (b) sugar water (c) soap solution (d) salt water
16. 16.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a bowl (b) cold water to rinse (c) a magnet (d) fresh cream
17. 17.True or false: sand and pebbles is not needed for the muddy water filter. (a) True (b) False
18. 18.🪴 Where did the water inside the bag come from? (a) the rubber band (b) the plastic (c) the leaves (d) the rain
19. 19.⚡ A rubbed comb is held near tiny paper bits. What happens? (a) jumps to the comb (b) does not move
20. 20.🔍 Which is the odd one out? (a) a cork (b) a glass marble (c) an ice cube (d) a ping-pong ball
21. 21.🚁 Dropped from a raised hand, does a fluff of cotton fall slowly or fast? (a) falls slowly (b) falls fast
22. 22.🥚 Why is an egg hard to crush when you press on its two ends? (a) it is very hot (b) it is made of steel (c) it is magnetic (d) its curved arch shape
23. 23.🧺 Do we need a battery cell for the leafy bag test? (a) needed (b) not needed
24. 24.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) a white flower (c) a few hours of waiting (d) a balloon
25. 25.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) yeast (b) an adult with an iron (c) lemon juice (d) white paper
26. 26.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the amount of water is the one thing we change. (a) False (b) True
27. 27.🔮 What would change if the flower stood in plain water? (a) no colour change (b) the flower glows (c) the petals turn red (d) the stem turns blue
28. 28.True or false: turmeric powder is not needed for the water rainbow. (a) False (b) True
29. 29.True or false: a mirror is needed for the float-or-sink test. (a) False (b) True
30. 30.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is what we measure? (a) the order of the layers (b) the same three liquids (c) the same glass (d) how much of each liquid
31. 31.🧺 Do we need a clear plastic bag for the leafy bag test? (a) needed (b) not needed
32. 32.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the bench (c) on the blackboard (d) in the tap
33. 33.🧺 Which of these is needed for the float-or-sink test? (a) a tub of water (b) a magnet (c) turmeric powder (d) yeast
34. 34.True or false: a magnet is something yeast needs. (a) True (b) False
35. 35.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: amount of water drops is what we measure. (a) True (b) False
36. 36.🧺 Do we need bright sunlight for the water rainbow? (a) not needed (b) needed
37. 37.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
38. 38.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) detergent water (d) lemon juice
39. 39.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 2 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
40. 40.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a rubber band (b) a clear plastic bag (c) a potted plant (d) turmeric powder

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