Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 59 · 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.🫧 What do you see when baking soda meets vinegar? (a) it glows in the dark (b) lots of fizzy bubbles (c) nothing at all (d) it turns to ice
2. 2.🧺 Which of these is not needed for the turmeric test? (a) a battery cell (b) lemon juice (c) water (d) white paper strips
3. 3.🔍 Which is the odd one out? (a) a steel spoon (b) a paper helicopter (c) a fluff of cotton (d) a feather
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) False (b) True
5. 5.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) False (b) True
6. 6.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it might sing (d) it gets hot
7. 7.🧺 Three of these are needed for the shadow clock. Which one is NOT needed? (a) a mirror (b) a straight stick (c) chalk to mark shadows (d) a clock to check
8. 8.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is the one thing we change? (a) the same window (b) the amount of water (c) the same glass (d) the time of day
9. 9.True or false: a book is translucent. (a) False (b) True
10. 10.🧺 Which of these is needed for the paper helicopter? (a) a strip of paper (b) turmeric powder (c) a balloon (d) a magnet
11. 11.🚀 In “push back, move forward”, which way does the balloon go? (a) goes backward (b) goes forward
12. 12.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a battery cell (b) small test objects (c) a towel for spills (d) a tub of water
13. 13.True or false: touching a hot iron is a safe habit. (a) True (b) False
14. 14.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is kept the same. (a) False (b) True
15. 15.🏗️ Which of these gets its strength from triangles? (a) a bridge truss (b) a round pillar (c) an eggshell (d) an old stone bridge
16. 16.🧺 Do we need a funnel or spoon for the fizzy balloon? (a) not needed (b) needed
17. 17.🚁 Dropped from a raised hand, does a stone fall slowly or fast? (a) falls slowly (b) falls fast
18. 18.🛟 What should you do with leftover materials at the end? (a) leave them out (b) clean up safely (c) taste them (d) hide them
19. 19.True or false: a mirror is needed for the shadow clock. (a) False (b) True
20. 20.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
21. 21.🧺 Do we need a battery cell for the shadow clock? (a) needed (b) not needed
22. 22.🔮 The fizzing stops after a while. Why? (a) the gas froze (b) an ingredient ran out (c) the balloon got cold (d) the bottle got tired
23. 23.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows very little (c) it grows much faster (d) it bursts at once
24. 24.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
25. 25.True or false: a pebble is less dense than water. (a) False (b) True
26. 26.True or false: a magnetic pin holder works by magnetism. (a) True (b) False
27. 27.🔮 A ball of clay sinks. What happens if you press it into a thin boat shape? (a) it turns to stone (b) it can float (c) it sinks faster (d) it dissolves
28. 28.True or false: drops under a pot lid is melting. (a) False (b) True
29. 29.🪴 Which part of a plant does this job: make seeds? (a) stem (b) roots (c) leaves (d) flower
30. 30.🧺 Do we need a battery cell for the water cycle bowl? (a) not needed (b) needed
31. 31.🍞 Which of these is something yeast needs? (a) a magnet (b) time (c) salt (d) vinegar
32. 32.True or false: a balloon is needed for the pendulum. (a) False (b) True
33. 33.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) easier (c) harder (d) the same
34. 34.⚖️ Fair test — which paper shape holds the most coins? Which of these is what we measure? (a) coins it holds (b) the kind of coins (c) the kind of paper (d) where coins are placed
35. 35.🔍 What do you see after shaking cream in a jar for a long time? (a) bubbles of gas (b) lumps of butter (c) sugar crystals (d) clear water only
36. 36.True or false: a comb is needed for the yeast balloon. (a) False (b) True
37. 37.True or false: a drinking straw is not needed for the balloon rocket. (a) True (b) False
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 measure it (b) we change it (c) we keep it the same
39. 39.🪴 Where did the water inside the bag come from? (a) the plastic (b) the rubber band (c) the rain (d) the leaves
40. 40.True or false: dry hair does not move to a charged comb. (a) True (b) False

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