Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 115 · 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: a rubber band is not needed for the leafy bag test. (a) False (b) True
2. 2.🧺 Which of these is needed for the muddy water filter? (a) a balloon (b) yeast (c) a funnel (d) a battery cell
3. 3.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a balloon (b) vinegar (c) a long string (d) a drinking straw
4. 4.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a mirror (b) a stiff postcard (c) a glass of water (d) a towel
5. 5.🔍 Which is the odd one out? (a) a zigzag-folded sheet (b) paper with folded edges (c) a torn flat sheet (d) rolled paper tubes
6. 6.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) sticky tape (b) a ruler (c) two small mirrors (d) turmeric powder
7. 7.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the filter material (b) the same glass (c) the same funnel (d) the amount poured
8. 8.True or false: plugging in the iron is a job for an adult. (a) True (b) False
9. 9.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) baking a cake (c) cooking an egg (d) folding paper
10. 10.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) a magnet (d) warm water
11. 11.True or false: turmeric powder is needed for the balloon rocket. (a) True (b) False
12. 12.🪴 Which part of a plant does this job: carry water upward? (a) roots (b) flower (c) stem (d) leaves
13. 13.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a mirror (c) a pencil (d) a small paper cup
14. 14.True or false: lemon juice is needed for the turmeric test. (a) False (b) True
15. 15.🧺 Which of these is needed for the muddy water filter? (a) a mirror (b) muddy water (c) a magnet (d) a balloon
16. 16.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a paper clip (c) turmeric powder (d) a small bottle
17. 17.🧺 Which of these is not needed for the secret lemon message? (a) white paper (b) a small bowl (c) yeast (d) a cotton bud
18. 18.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns brighter (b) it floats away (c) the rainbow fades (d) it turns all red
19. 19.🥄 Which of these dissolves slower? (a) sugar stirred well (b) powdered sugar (c) sugar left unstirred (d) sugar in warm water
20. 20.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to grow plants (c) to cool the glass (d) to catch any spills
21. 21.True or false: a battery cell is needed for the leafy bag test. (a) False (b) True
22. 22.🔬 How many steps are there in our scientific method (question to conclusion)?
23. 23.🧺 Which of these is not needed for the water rainbow? (a) a sheet of white paper (b) a clear glass of water (c) bright sunlight (d) a battery cell
24. 24.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a compass needle (c) a magnetic pin holder (d) a medicine dropper
25. 25.🚀 In “push back, move forward”, which way does the swimmer go? (a) goes forward (b) goes backward
26. 26.True or false: a straight stick is needed for the shadow clock. (a) True (b) False
27. 27.🛟 Static from a comb is safe. Which electricity must children never play with? (a) paper bits on a comb (b) a rubbed balloon (c) a rubbed plastic comb (d) plug points at home
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
29. 29.🧺 Which of these is needed for the pendulum? (a) yeast (b) a magnet (c) a pencil and tape (d) a battery cell
30. 30.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: how full the glass is is what we measure. (a) True (b) False
31. 31.🧺 Which of these is needed for the static comb? (a) turmeric powder (b) a battery cell (c) a balloon (d) a mirror
32. 32.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) turmeric powder (b) a clean glass (c) a funnel (d) sand and pebbles
33. 33.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) no change at all (b) more friction, less far (c) less friction (d) it goes faster
34. 34.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
35. 35.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) water with food colour (b) honey (c) a tall clear glass (d) a magnet
36. 36.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
37. 37.🔮 Predict: you hold a written word up to a mirror. The letters look ___. (a) much bigger (b) upside down only (c) flipped left to right (d) in colour
38. 38.🏗️ Where does an electric tower get its strength from? (a) arches and domes (b) tubes (c) triangles
39. 39.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) a flat table (d) a magnet
40. 40.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the ironing time is the one thing we change. (a) True (b) False

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