Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 77 · 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.🧺 Which of these is needed for the shadow clock? (a) yeast (b) a balloon (c) a magnet (d) chalk to mark shadows
2. 2.🚁 Dropped from a raised hand, does a steel spoon fall slowly or fast? (a) falls fast (b) falls slowly
3. 3.⚖️ 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 same glass”? (a) we keep it the same (b) we measure it (c) we change it
4. 4.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “brightness of rainbow”? (a) we keep it the same (b) we change it (c) we measure it
5. 5.💧 Dip a piece of foil into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
6. 6.True or false: yeast is not needed for the shadow clock. (a) True (b) False
7. 7.True or false: a steel spoon falls fast through the air. (a) False (b) True
8. 8.🔍 Which is the odd one out? (a) a plastic ruler (b) a paper towel (c) a sugar cube (d) a piece of chalk
9. 9.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) bigger crystals (c) smaller crystals (d) liquid crystals
10. 10.🧺 Three of these are needed for the paper bridge. Which one is NOT needed? (a) a balloon (b) coins (c) two books (d) a ruler
11. 11.⚖️ Fair test — which paper shape holds the most coins? What do we do with “the shape of the paper”? (a) we measure it (b) we keep it the same (c) we change it
12. 12.🍋 What colour does the lemon writing turn when an adult warms it? (a) brown (b) green (c) white (d) blue
13. 13.🛟 Is this a safe or an unsafe habit in an experiment: washing hands afterwards? (a) safe (b) unsafe
14. 14.🌉 Which of these makes a strong bridge? (a) paper with folded edges (b) a torn flat sheet (c) one flat sheet (d) a flat tissue
15. 15.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) water with food colour (b) a battery cell (c) cooking oil (d) a tall clear glass
16. 16.🧺 Do we need a clock to check for the shadow clock? (a) not needed (b) needed
17. 17.🧺 Do we need a magnet for the balloon rocket? (a) needed (b) not needed
18. 18.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) dark green (b) bright red (c) pale yellow (d) blue
19. 19.🌉 Which of these makes a weak bridge? (a) paper with folded edges (b) a U-shaped channel (c) a wet flat sheet (d) a zigzag-folded sheet
20. 20.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) time for 10 swings (c) the same hook (d) how far we pull it back
21. 21.🧺 Do we need a mirror for making butter? (a) not needed (b) needed
22. 22.🛟 The water for the yeast should be ___. (a) warm, not hot (b) boiling hot (c) very salty (d) ice cold
23. 23.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) time to make butter (b) the amount of cream (c) the cream temperature
24. 24.🧺 Which of these is needed for the muddy water filter? (a) a funnel (b) a magnet (c) yeast (d) a balloon
25. 25.🌈 In VIBGYOR, what number colour is violet?
26. 26.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) a balloon (c) a sunny window (d) a clear glass of water
27. 27.True or false: a ball of clay sinks in water. (a) False (b) True
28. 28.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the size of the bowl”? (a) we change it (b) we measure it (c) we keep it the same
29. 29.🚀 In “push back, move forward”, which way does water from the oars go? (a) goes backward (b) goes forward
30. 30.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is what we measure. (a) True (b) False
31. 31.True or false: a paper clip is needed for the paper helicopter. (a) True (b) False
32. 32.🧂 Which of these does not dissolve in water? (a) sugar (b) food colour (c) sand (d) table salt
33. 33.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) a mirror (c) lemon juice (d) an adult with an iron
34. 34.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is what we measure? (a) the order of the layers (b) the same glass (c) the order of pouring (d) how much of each liquid
35. 35.True or false: a shiny steel plate reflects light poorly. (a) False (b) True
36. 36.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) turmeric powder (c) a mirror (d) yeast
37. 37.🫗 Why does cooking oil float on top of water? (a) oil is heavier (b) oil is less dense (c) oil is hot (d) oil is sticky
38. 38.🛟 Which of these is a safe habit? (a) putting things in mouth (b) reading the steps first (c) running with glassware (d) mixing random liquids
39. 39.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “the angle of the mirrors”? (a) we keep it the same (b) we measure it (c) we change it
40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the colour we see (c) the turmeric paper (d) the light we look in

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