Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 78 · 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 — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) True (b) False
2. 2.🛟 Which rule keeps the density tower experiment safe? (a) pour it on the floor (b) throw the glass (c) taste each layer (d) do not lick the spoon
3. 3.True or false: air from the balloon goes backward. (a) True (b) False
4. 4.True or false: a clear plastic bag is not needed for the leafy bag test. (a) False (b) True
5. 5.⚖️ Fair test — do seeds need water to sprout? What do we do with “the kind of seeds”? (a) we keep it the same (b) we change it (c) we measure it
6. 6.True or false: water is not needed for the water cycle bowl. (a) True (b) False
7. 7.🔮 Predict: you use plain water instead of vinegar. What happens? (a) a huge eruption (b) very little fizzing (c) the balloon bursts (d) it turns to honey
8. 8.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) bright sunlight (c) a sunny window (d) a magnet
9. 9.⚖️ Fair test — does rubbing the comb more times pick up more paper bits? What do we do with “the paper bit size”? (a) we measure it (b) we keep it the same (c) we change it
10. 10.⚖️ Fair test — does rubbing the comb more times pick up more paper bits? True or false: distance to the paper is the one thing we change. (a) False (b) True
11. 11.🔭 How many times does light bounce off a mirror in a simple periscope?
12. 12.🧺 Do we need a sunny open place for the shadow clock? (a) needed (b) not needed
13. 13.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
14. 14.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “the same mirrors”? (a) we keep it the same (b) we measure it (c) we change it
15. 15.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: how clear the view is is kept the same. (a) False (b) True
16. 16.🧺 Do we need vinegar for the balloon rocket? (a) needed (b) not needed
17. 17.🧺 Which of these is needed for the shadow clock? (a) a mirror (b) a balloon (c) a straight stick (d) yeast
18. 18.⚖️ Fair test — how does the shadow of a stick change through the day? Which of these is what we measure? (a) the stick kept upright (b) shadow length (c) the same spot (d) the time of day
19. 19.🛟 What should you do after handling food colour? (a) rub your eyes (b) lick your fingers (c) wipe them on walls (d) wash your hands
20. 20.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
21. 21.🧺 Do we need vinegar for the leafy bag test? (a) needed (b) not needed
22. 22.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the same carton is what we measure. (a) False (b) True
23. 23.🧺 Do we need a mirror for the coloured flower experiment? (a) needed (b) not needed
24. 24.True or false: bran from wheat flour is done by filtering. (a) False (b) True
25. 25.True or false: a toy parachute falls slowly through the air. (a) False (b) True
26. 26.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a well pulley (c) a spoon lifting a lid (d) a doorknob
27. 27.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
28. 28.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a balloon (c) a mirror (d) dry yeast
29. 29.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) turmeric powder (c) a towel (d) a stiff postcard
30. 30.True or false: a plastic ruler lets water climb up it. (a) True (b) False
31. 31.🧺 Do we need a ruler for the paper helicopter? (a) not needed (b) needed
32. 32.⚖️ Fair test — does rubbing the comb more times pick up more paper bits? What do we do with “number of rubs”? (a) we measure it (b) we keep it the same (c) we change it
33. 33.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) warm water (b) a clock or timer (c) two clear glasses (d) a balloon
34. 34.True or false: a stone falls fast through the air. (a) False (b) True
35. 35.🔦 Which of these is translucent? (a) your hand (b) a steel plate (c) clean water (d) frosted glass
36. 36.🧺 Do we need bright sunlight for the water rainbow? (a) not needed (b) needed
37. 37.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) red (b) orange (c) violet (d) yellow
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) a shallow dish (c) a piece of string (d) a spoon
39. 39.🧲 Which of these pull together? (a) south near south (b) north near north (c) south near north
40. 40.🧂 Which of these does not dissolve in water? (a) glucose powder (b) cooking oil (c) sugar (d) table salt

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