Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 86 · 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 growing salt crystals. Which one is NOT needed? (a) a mirror (b) salt (c) a piece of string (d) a spoon
2. 2.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) a balloon (b) an empty juice carton (c) two small mirrors (d) a ruler
3. 3.🔍 Which is the odd one out? (a) a dull brick (b) aluminium foil (c) a shiny steel plate (d) a mirror
4. 4.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) melting ice (c) cooking an egg (d) baking a cake
5. 5.True or false: a battery cell is not needed for the leafy bag test. (a) False (b) True
6. 6.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “whether it floats”? (a) we keep it the same (b) we change it (c) we measure it
7. 7.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) yeast (c) an adult with an iron (d) a small bowl
8. 8.🧺 Three of these are needed for the static comb. Which one is NOT needed? (a) a balloon (b) a plastic comb (c) a magnet (d) dry hair
9. 9.True or false: reading the message is a job a child can do. (a) True (b) False
10. 10.🛟 Why must a plastic bag never go over anyone’s head? (a) it is too big (b) it changes colour (c) it can block breathing (d) it gets wet
11. 11.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a balloon (b) a results table (c) a towel for spills (d) small test objects
12. 12.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) prisms (b) clouds (c) balloons (d) magnets
13. 13.🛟 How should you check if the sugar has dissolved? (a) taste it (b) smell it closely (c) look for leftover grains (d) poke it with a finger
14. 14.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a sieve (b) a mathani (churner) (c) a rolling pin (d) a pressure cooker
15. 15.True or false: a mirror is not needed for the water rainbow. (a) True (b) False
16. 16.🫗 Why does filtered muddy water look clearer? (a) the filter traps mud (b) the mud dissolves (c) the filter adds soap (d) the water evaporates
17. 17.⚖️ Fair test — which kind of ball bounces highest? True or false: the kind of ball is kept the same. (a) False (b) True
18. 18.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) a battery cell (b) an empty juice carton (c) two small mirrors (d) a ruler
19. 19.🛟 What should you do with wet floors after the experiment? (a) slide on them (b) pour more water (c) wipe them dry (d) leave them wet
20. 20.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the iron setting”? (a) we keep it the same (b) we measure it (c) we change it
21. 21.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is what we measure? (a) the amount of colour (b) the length of the stem (c) the amount of water (d) time for colour to show
22. 22.🧺 Do we need a battery cell for the balloon rocket? (a) needed (b) not needed
23. 23.🧺 Which of these is needed for the turmeric test? (a) lemon juice (b) a mirror (c) yeast (d) a magnet
24. 24.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
25. 25.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is kept the same? (a) the same card (b) how full the glass is (c) whether the card stays
26. 26.🧺 Do we need cotton or cloth for the muddy water filter? (a) needed (b) not needed
27. 27.True or false: melting butter is a change that can be undone. (a) True (b) False
28. 28.🔦 Which of these is transparent? (a) butter paper (b) tissue paper (c) clear plastic film (d) a steel plate
29. 29.🧺 Which of these is not needed for the coloured flower experiment? (a) food colour (b) a glass of water (c) turmeric powder (d) a white flower
30. 30.🔍 Sand is stirred into water. What do you see after a while? (a) it dissolves (b) it floats up (c) it settles at the bottom (d) it turns blue
31. 31.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
32. 32.⚖️ Fair test — which paper shape holds the most coins? What do we do with “where coins are placed”? (a) we keep it the same (b) we measure it (c) we change it
33. 33.🥄 Why does sugar dissolve faster in warm water? (a) sugar likes the dark (b) particles move faster (c) cold water is wet (d) warm water is thicker
34. 34.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) coins of one kind (d) a mirror
35. 35.🧺 Which of these is not needed for the leafy bag test? (a) a rubber band (b) yeast (c) a potted plant (d) sunlight
36. 36.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
37. 37.🍋 Which of these steps is a job for an adult? (a) ironing the paper (b) reading the message (c) letting the paper dry (d) writing the message
38. 38.True or false: dipping the cotton bud is a job for an adult. (a) True (b) False
39. 39.🔍 Which is the odd one out? (a) an ice cube (b) a metal key (c) a coin (d) an iron nail
40. 40.🛟 Which of these is an unsafe habit? (a) wiping up spills at once (b) touching a hot iron (c) tying back long hair (d) asking an adult first

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