Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 45 · 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.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is kept the same? (a) distance it travels (b) how big we blow it (c) the same string
2. 2.🌱 Which of these is not needed for a seed to sprout? (a) sunlight (b) warmth (c) air (d) water
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) the same hook (c) time for 10 swings
4. 4.🧺 Do we need a spoon for the density tower? (a) needed (b) not needed
5. 5.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a pressure cooker (b) a mathani (churner) (c) a sieve (d) a rolling pin
6. 6.🛟 Which rule keeps you safe when working with sunlight? (a) look at it in a mirror (b) stare at the Sun (c) look at it through glass (d) never look at the Sun
7. 7.⚖️ 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 “the order of the layers”? (a) we change it (b) we keep it the same (c) we measure it
8. 8.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is magnetic (c) it is hotter (d) it will not break
9. 9.True or false: a funnel is not needed for the muddy water filter. (a) True (b) False
10. 10.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) turmeric powder (c) a battery cell (d) warm water
11. 11.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) baking soda water (d) vinegar
12. 12.🔍 Which is the odd one out? (a) a ping-pong ball (b) a coin (c) honey (d) very salty water
13. 13.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) vinegar
14. 14.⚖️ 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) whether the card stays (b) how full the glass is (c) the same glass
15. 15.🧺 Do we need cooking oil for the density tower? (a) not needed (b) needed
16. 16.🧺 Do we need a ruler for the paper bridge? (a) needed (b) not needed
17. 17.🧺 Which of these is needed for the paper helicopter? (a) yeast (b) a paper clip (c) a magnet (d) a balloon
18. 18.🧺 Do we need a magnet for the float-or-sink test? (a) needed (b) not needed
19. 19.⚖️ Fair test — how does the shadow of a stick change through the day? Which of these is the one thing we change? (a) shadow length (b) the same stick (c) the same spot (d) the time of day
20. 20.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) coins of one kind (d) yeast
21. 21.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
22. 22.🧺 Three of these are needed for the paper bridge. Which one is NOT needed? (a) a balloon (b) sheets of paper (c) coins (d) a ruler
23. 23.True or false: a doorknob is an inclined plane. (a) False (b) True
24. 24.⚡ Why does the rubbed comb pull the paper bits? (a) it is sticky (b) it is hot (c) it is a magnet (d) it has static charge
25. 25.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) an adult with an iron (c) lemon juice (d) yeast
26. 26.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) cotton or cloth (b) a funnel (c) a clean glass (d) a magnet
27. 27.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) tamarind water (c) soap solution (d) plain water
28. 28.🍋 Which of these steps is a job for an adult? (a) dipping the cotton bud (b) ironing the paper (c) reading the message (d) writing the message
29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the number of drops (b) the liquid we test (c) the colour we see (d) the turmeric paper
30. 30.🚀 In “push back, move forward”, which way does the swimmer go? (a) goes forward (b) goes backward
31. 31.🧺 Which of these is not needed for the paper helicopter? (a) a paper clip (b) a pencil (c) a balloon (d) a strip of paper
32. 32.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are too cold (c) they are magnetic (d) they may swallow them
33. 33.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is what we measure? (a) how full the glass is (b) the same glass (c) whether the card stays (d) the same card
34. 34.🔍 Which is the odd one out? (a) warmth (b) sugar (c) air (d) water
35. 35.🥄 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
36. 36.🧺 Which of these is not needed for the water rainbow? (a) a magnet (b) bright sunlight (c) a clear glass of water (d) a sheet of white paper
37. 37.⚡ Which of these jumps to a charged comb? (a) a brick (b) a pebble (c) thermocol bits (d) a heavy book
38. 38.🔍 Which is the odd one out? (a) soil (b) air (c) salt (d) sunlight
39. 39.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) bend it till it snaps (c) stand on the ruler (d) flick coins at faces
40. 40.💧 Dip a steel spoon into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb

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