Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 79 · 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 the shape of a lump of clay change whether it floats? What do we do with “the tub of water”? (a) we measure it (b) we keep it the same (c) we change it
2. 2.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the time we wait is the one thing we change. (a) True (b) False
3. 3.🔍 Which is the odd one out? (a) an ice-cream stick (b) a ball of clay (c) a feather (d) an ice cube
4. 4.🛟 Why must small magnets be kept away from little children? (a) they are too heavy (b) they are too hot (c) they may swallow them (d) they smell bad
5. 5.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
6. 6.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they sprout faster (b) they do not sprout (c) they glow (d) they grow fruit
7. 7.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the amount of cream is kept the same. (a) False (b) True
8. 8.True or false: sugar is needed for a seed to sprout. (a) False (b) True
9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we keep it the same (c) we measure it
10. 10.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) an acid (c) neutral
11. 11.🌧️ The drops falling back into the bowl are like which part of the real water cycle? (a) rain (b) sunshine (c) wind (d) lightning
12. 12.🧺 Do we need yeast for the coloured flower experiment? (a) needed (b) not needed
13. 13.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same string is kept the same. (a) True (b) False
14. 14.🔍 Which is the odd one out? (a) frosted glass (b) clear glass (c) clear plastic film (d) clean water
15. 15.🔮 Predict: you make the periscope tube twice as tall. You can see over ___. (a) only short walls (b) taller walls (c) the ground (d) nothing at all
16. 16.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) it cannot swing (c) much slower (d) about the same
17. 17.🛟 How should the plastic bag be tied around the branch? (a) gently, not too tight (b) with a hot glue gun (c) as tight as possible (d) with sharp wire
18. 18.🧺 Three of these are needed for the magnet test. Which one is NOT needed? (a) a balloon (b) a bar magnet (c) a tray (d) a results chart
19. 19.🍯 Is very salty water denser or less dense than water? (a) denser than water (b) less dense than water
20. 20.🔍 Which is the odd one out? (a) aluminium foil (b) still clear water (c) a mirror (d) a dull brick
21. 21.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
22. 22.🔮 Predict: you blow the balloon up only a little. What happens? (a) it goes less far (b) it flies off the string (c) it turns into a kite (d) it goes much farther
23. 23.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “where the pencil is”? (a) we change it (b) we measure it (c) we keep it the same
24. 24.⚙️ Which of these is a lever? (a) a flagpole (b) a doorknob (c) a well pulley (d) a bottle opener
25. 25.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it turns to sugar (c) the yeast is killed (d) it glows
26. 26.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same funnel is kept the same. (a) False (b) True
27. 27.True or false: a magnet is needed for the pendulum. (a) True (b) False
28. 28.🥚 A fresh egg sinks in plain water. What makes it float? (a) a little shaking (b) lots of salt stirred in (c) a few ice cubes (d) more plain water
29. 29.🧺 Do we need sticky tape for the balloon rocket? (a) needed (b) not needed
30. 30.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
31. 31.True or false: a mirror is needed for the pendulum. (a) True (b) False
32. 32.🥛 Which of these works by magnetism? (a) a suction hook (b) a bicycle pump (c) a compass needle (d) a drinking straw
33. 33.🔬 In the scientific method, which step number is “do the experiment”?
34. 34.🛟 Why should the glass of water stand on a steady, flat place? (a) so the Sun moves (b) so it turns blue (c) so it gets hot (d) so it does not fall
35. 35.🔮 Predict: you put the coins in the middle instead of near the ends. The bridge bends ___. (a) not at all (b) upward (c) more (d) less
36. 36.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a pencil (b) a strip of paper (c) a balloon (d) safety scissors
37. 37.🧺 Do we need a tall clear glass for the density tower? (a) needed (b) not needed
38. 38.True or false: sawdust dissolves in water. (a) False (b) True
39. 39.🧲 Where is a bar magnet’s pull strongest? (a) at its two poles (b) everywhere the same (c) nowhere (d) in the middle
40. 40.⚖️ Fair test — how does the shadow of a stick change through the day? True or false: the same stick is what we measure. (a) False (b) True

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