Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 39 · 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.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) safety scissors (b) a pencil (c) a balloon (d) a paper clip
2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the light we look in (b) the turmeric paper (c) the liquid we test (d) the number of drops
3. 3.🔍 Which is the odd one out? (a) a flat tissue (b) paper with folded edges (c) a U-shaped channel (d) rolled paper tubes
4. 4.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is hotter (c) it will not break (d) it is magnetic
5. 5.🔍 Which is the odd one out? (a) food colour (b) glucose powder (c) cooking oil (d) table salt
6. 6.🛟 What should you do if vinegar splashes in your eye? (a) ignore it (b) add baking soda (c) rinse with clean water (d) rub it hard
7. 7.True or false: plain water keeps turmeric yellow. (a) True (b) False
8. 8.True or false: a paper helicopter falls fast through the air. (a) True (b) False
9. 9.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a battery cell (b) lemon juice (c) a small bowl (d) an adult with an iron
10. 10.🚀 Which of these goes forward? (a) air from the balloon (b) the rocket (c) water from the oars (d) water a swimmer pushes
11. 11.🌈 How many colours do we name in a rainbow (VIBGYOR)?
12. 12.🕰️ What is a sundial used for? (a) telling the time (b) making rainbows (c) measuring rain (d) weighing things
13. 13.⚖️ Fair test — does a stronger magnet pull a paper clip through more sheets of paper? True or false: the magnet used is kept the same. (a) True (b) False
14. 14.🫧 Which of these is neutral? (a) baking soda water (b) vinegar (c) curd (d) salt water
15. 15.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) it turns to sugar (b) yes, all of it (c) it turns to sand (d) no, salt passes through
16. 16.🧺 Which of these is needed for the paper bridge? (a) coins (b) a mirror (c) a balloon (d) turmeric powder
17. 17.🛟 Why must small magnets be kept away from little children? (a) they are too hot (b) they are too heavy (c) they smell bad (d) they may swallow them
18. 18.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) the balloon is bigger (c) the balloon is smaller (d) it turns to bread
19. 19.🔍 Which is the odd one out? (a) chalk powder (b) sawdust (c) baking soda (d) sand
20. 20.🧺 Which of these is not needed for the shadow clock? (a) a straight stick (b) chalk to mark shadows (c) a balloon (d) a sunny open place
21. 21.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) a mirror (c) an empty bottle (d) a funnel or spoon
22. 22.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the same jar”? (a) we keep it the same (b) we measure it (c) we change it
23. 23.🔮 Predict: the Sun is low in the evening sky. The stick’s shadow is ___. (a) long (b) round (c) short (d) missing
24. 24.🧺 Three of these are needed for the static comb. Which one is NOT needed? (a) vinegar (b) a plastic comb (c) tiny paper bits (d) dry hair
25. 25.⚖️ Fair test — how does the shadow of a stick change through the day? Which of these is what we measure? (a) the stick kept upright (b) shadow length (c) the same spot (d) the same stick
26. 26.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the same mirrors is kept the same. (a) True (b) False
27. 27.🔍 Which is the odd one out? (a) a steel spoon (b) a pebble (c) a heavy book (d) a thin water stream
28. 28.🥄 Why does sugar dissolve faster in warm water? (a) warm water is thicker (b) sugar likes the dark (c) cold water is wet (d) particles move faster
29. 29.🧺 Which of these is not needed for the water rainbow? (a) a magnet (b) a sheet of white paper (c) a sunny window (d) a clear glass of water
30. 30.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the same three liquids is the one thing we change. (a) True (b) False
31. 31.True or false: water is not needed for the turmeric test. (a) False (b) True
32. 32.⚖️ 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 keep it the same (b) we measure it (c) we change it
33. 33.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it can hurt your finger (d) it gets wet
34. 34.🔮 Predict: you put the coins in the middle instead of near the ends. The bridge bends ___. (a) upward (b) more (c) not at all (d) less
35. 35.🔭 Who uses a periscope to look above the water? (a) a pilot in a plane (b) a farmer (c) a baker (d) a submarine crew
36. 36.🏗️ Where does a roof frame get its strength from? (a) triangles (b) tubes (c) arches and domes
37. 37.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is kept the same. (a) True (b) False
38. 38.⚙️ Which of these is a lever? (a) a slide (b) a bottle opener (c) a crane (d) a sloping road
39. 39.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) freezing water (c) dissolving salt (d) melting butter
40. 40.🔍 Which is the odd one out? (a) asking an adult first (b) putting things in mouth (c) running with glassware (d) mixing random liquids

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