Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 38 · 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: turmeric powder is not needed for the coloured flower experiment. (a) False (b) True
2. 2.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
3. 3.True or false: a ball of clay sinks in water. (a) False (b) True
4. 4.🌉 Which of these makes a weak bridge? (a) a zigzag-folded sheet (b) paper with folded edges (c) a wet flat sheet (d) rolled paper tubes
5. 5.🚁 Dropped from a raised hand, does a glass marble fall slowly or fast? (a) falls fast (b) falls slowly
6. 6.True or false: detergent water keeps turmeric yellow. (a) True (b) False
7. 7.🧺 Do we need a mirror for making butter? (a) not needed (b) needed
8. 8.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the person dropping is what we measure. (a) False (b) True
9. 9.🔍 Which is the odd one out? (a) sand (b) table salt (c) sugar (d) glucose powder
10. 10.🔍 Which is the odd one out? (a) a flat tissue (b) a U-shaped channel (c) paper with folded edges (d) a zigzag-folded sheet
11. 11.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) sticky tape (b) two chairs (c) a mirror (d) a balloon
12. 12.🧺 Do we need yeast for the secret lemon message? (a) not needed (b) needed
13. 13.True or false: drops on a cold glass is condensation. (a) False (b) True
14. 14.🔍 Which is the odd one out? (a) a rough wooden board (b) a dull brick (c) black cloth (d) still clear water
15. 15.🔍 Which is the odd one out? (a) a compass needle (b) a drinking straw (c) a magnetic chess set (d) a fridge magnet
16. 16.True or false: a balloon is needed for the density tower. (a) False (b) True
17. 17.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) False (b) True
18. 18.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more accurate (c) it is more fun (d) 10 is a lucky number
19. 19.🪴 Which of these is a job of the stem? (a) take in water from soil (b) hold up the leaves (c) give out water vapour (d) make food in sunlight
20. 20.🌈 Why does sunlight make a rainbow through a glass of water? (a) the water is coloured (b) water splits the light (c) the paper makes colours (d) the glass is painted
21. 21.☀️ What is white sunlight really made of? (a) many colours mixed (b) tiny bits of dust (c) only yellow light (d) tiny drops of water
22. 22.🧺 Which of these is needed for the pendulum? (a) a ruler (b) turmeric powder (c) yeast (d) a magnet
23. 23.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a shadow of ice (b) a small rainbow (c) snow falling (d) a magnet
24. 24.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
25. 25.True or false: sugar from sugar water is done by sieving. (a) False (b) True
26. 26.⚖️ Fair test — which kind of ball bounces highest? True or false: bounce height is kept the same. (a) True (b) False
27. 27.True or false: turmeric powder is not needed for the float-or-sink test. (a) False (b) True
28. 28.🛟 Why should you not over-blow the balloon? (a) it gets too heavy (b) it changes colour (c) it can pop loudly (d) it turns into a kite
29. 29.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
30. 30.⚖️ Fair test — how does the shadow of a stick change through the day? Which of these is what we measure? (a) shadow length (b) the stick kept upright (c) the time of day (d) the same stick
31. 31.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) cold water to rinse (b) a balloon (c) a timer (d) a jar with a tight lid
32. 32.⚖️ Fair test — how does the shadow of a stick change through the day? What do we do with “the time of day”? (a) we change it (b) we keep it the same (c) we measure it
33. 33.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the size of the bowl”? (a) we keep it the same (b) we change it (c) we measure it
34. 34.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) turmeric powder (d) a heavy nut or washer
35. 35.🧺 Do we need a bowl for making butter? (a) needed (b) not needed
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we keep it the same (c) we measure it
37. 37.🛟 Which is the safe way to do the float-or-sink test? (a) leave water on the floor (b) wipe up spills at once (c) play near a deep pond (d) run around the tub
38. 38.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the same ruler”? (a) we change it (b) we keep it the same (c) we measure it
39. 39.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
40. 40.True or false: sugar in warm water dissolves slower. (a) False (b) True

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