Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 108 · 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.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) a small bowl (c) an adult with an iron (d) a mirror
2. 2.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the water temperature is what we measure. (a) False (b) True
3. 3.🌞 When is a stick’s shadow the shortest? (a) early morning (b) around noon (c) at night (d) late evening
4. 4.🛟 Static from a comb is safe. Which electricity must children never play with? (a) a rubbed balloon (b) plug points at home (c) a rubbed plastic comb (d) paper bits on a comb
5. 5.True or false: a comb is not needed for the fizzy balloon. (a) True (b) False
6. 6.🛟 Is this a safe or an unsafe habit in an experiment: wiping up spills at once? (a) unsafe (b) safe
7. 7.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is kept the same. (a) True (b) False
8. 8.True or false: yeast is needed for the density tower. (a) False (b) True
9. 9.True or false: letting the paper dry is a job a child can do. (a) True (b) False
10. 10.🔍 Which is the odd one out? (a) time (b) vinegar (c) a magnet (d) sunlight
11. 11.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the kind of plant is kept the same. (a) False (b) True
12. 12.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we measure it (b) we keep it the same (c) we change it
13. 13.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) reddish-brown (c) it turns blue (d) it turns green
14. 14.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: whether it floats is what we measure. (a) False (b) True
15. 15.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a few hours of waiting (b) a battery cell (c) a white flower (d) food colour
16. 16.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a balloon (c) a mirror (d) a 30 cm ruler
17. 17.True or false: a steel spoon falls slowly through the air. (a) True (b) False
18. 18.True or false: black cloth reflects light well. (a) False (b) True
19. 19.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a pencil (b) a balloon (c) a paper clip (d) a ruler
20. 20.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) honey (b) a battery cell (c) a spoon (d) cooking oil
21. 21.🛟 Why must the jar lid be screwed on tightly? (a) so it gets hot (b) so it turns yellow (c) so cream does not spill (d) so air gets out
22. 22.🏗️ Where does a bamboo pole get its strength from? (a) arches and domes (b) triangles (c) tubes
23. 23.🧺 Do we need a battery cell for the coloured flower experiment? (a) needed (b) not needed
24. 24.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) frozen (c) empty (d) saturated
25. 25.🧺 Which of these is not needed for the muddy water filter? (a) cotton or cloth (b) a funnel (c) a clean glass (d) a magnet
26. 26.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) a sheet of white paper (c) bright sunlight (d) a battery cell
27. 27.True or false: coins is needed for the paper bridge. (a) True (b) False
28. 28.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) press it gently (c) flick coins at faces (d) stand on the ruler
29. 29.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it doubles (c) it stays the same (d) it halves
30. 30.🧺 Which of these is needed for the leafy bag test? (a) a rubber band (b) a mirror (c) a magnet (d) a battery cell
31. 31.🧺 Do we need yeast for the water cycle bowl? (a) not needed (b) needed
32. 32.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) near a plug point (c) over a laptop (d) over a sink or bucket
33. 33.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
34. 34.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) no, hardly at all (c) yes, much slower (d) it stops swinging
35. 35.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is hot (c) it is wet (d) the bob could hit you
36. 36.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) the same string (b) the slope of the string (c) how big we blow it (d) distance it travels
37. 37.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it sinks to the bottom (b) it turns to sand (c) it dissolves (d) it floats on top
38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a pencil and tape (d) a mirror
39. 39.⚙️ Which simple machine is a doorknob? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) salt (d) a magnet

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