Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 112 · 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: muddy water is not needed for the muddy water filter. (a) False (b) True
2. 2.True or false: food colour is not needed for the coloured flower experiment. (a) True (b) False
3. 3.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is the one thing we change? (a) the order of the layers (b) the same glass (c) the order of pouring (d) the same three liquids
4. 4.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it turns yellow (c) it grows very little (d) it grows much faster
5. 5.🧺 Which of these is not needed for the magnet test? (a) a tray (b) a results chart (c) a bar magnet (d) vinegar
6. 6.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) two chairs (b) sticky tape (c) turmeric powder (d) a balloon
7. 7.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to colour rice (c) to clean floors (d) to wash dishes
8. 8.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
9. 9.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) yeast (c) a 30 cm ruler (d) a balloon
10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) True (b) False
11. 11.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the water temperature is what we measure. (a) False (b) True
12. 12.🔮 Predict: you stroke a steel needle many times with one end of a magnet, always the same way. What happens? (a) it melts (b) it becomes a magnet (c) it gets heavier (d) it turns to wood
13. 13.⚖️ Fair test — does rubbing the comb more times pick up more paper bits? What do we do with “the same comb”? (a) we measure it (b) we keep it the same (c) we change it
14. 14.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) the same string (b) the slope of the string (c) distance it travels (d) how big we blow it
15. 15.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a balloon (b) cold water to rinse (c) a jar with a tight lid (d) a timer
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) string (c) coins as the load (d) a small paper cup
17. 17.True or false: aluminium foil reflects light well. (a) False (b) True
18. 18.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is the one thing we change. (a) True (b) False
19. 19.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) at the very bottom (b) on top of the oil (c) in the water layer (d) in the oil layer
20. 20.🔍 Sand is stirred into water. What do you see after a while? (a) it dissolves (b) it settles at the bottom (c) it turns blue (d) it floats up
21. 21.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a sink or bucket (c) near a plug point (d) over a laptop
22. 22.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) an empty bottle (b) a seed (c) baking soda (d) vinegar
23. 23.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the room it stands in”? (a) we measure it (b) we keep it the same (c) we change it
24. 24.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) turmeric powder (c) bright sunlight (d) a clear glass of water
25. 25.📘 What is yeast? (a) a kind of sugar (b) a kind of salt (c) a tiny living fungus (d) a kind of stone
26. 26.🛟 Does a metal key float or sink in water? (a) sinks (b) floats
27. 27.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a mirror (c) a small bottle (d) a magnet
28. 28.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
29. 29.🛟 Why should the glass of water stand on a steady, flat place? (a) so the Sun moves (b) so it does not fall (c) so it gets hot (d) so it turns blue
30. 30.⚖️ Fair test — which kind of ball bounces highest? What do we do with “the kind of ball”? (a) we change it (b) we measure it (c) we keep it the same
31. 31.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns brighter (b) it turns all red (c) it floats away (d) the rainbow fades
32. 32.🧺 Which of these is not needed for the water rainbow? (a) turmeric powder (b) a sunny window (c) a sheet of white paper (d) bright sunlight
33. 33.🧺 Which of these is not needed for the secret lemon message? (a) an adult with an iron (b) lemon juice (c) a small bowl (d) a mirror
34. 34.🧺 Which of these is not needed for the muddy water filter? (a) a clean glass (b) a balloon (c) cotton or cloth (d) muddy water
35. 35.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
36. 36.🫧 Which of these is an acid? (a) baking soda water (b) sugar water (c) detergent water (d) vinegar
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) a shallow dish (c) salt (d) a spoon
38. 38.⚖️ 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 measure it (b) we change it (c) we keep it the same
39. 39.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) False (b) True
40. 40.🧺 Do we need baking soda for the fizzy balloon? (a) not needed (b) needed

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids