Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 73 · 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.🫧 Is sugar water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
2. 2.⚖️ Fair test — which kind of ball bounces highest? What do we do with “the kind of ball”? (a) we measure it (b) we change it (c) we keep it the same
3. 3.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a results table (b) turmeric powder (c) a towel for spills (d) a tub of water
4. 4.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) magnetism (c) air pressure (d) friction
5. 5.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) it looks nicer (c) water is heavier (d) the card gets wet
6. 6.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) sticky tape (b) a drinking straw (c) a balloon (d) a magnet
7. 7.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the iron setting”? (a) we keep it the same (b) we measure it (c) we change it
8. 8.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a battery cell (c) a mirror (d) an empty thread reel
9. 9.🧺 Three of these are needed for the shadow clock. Which one is NOT needed? (a) a sunny open place (b) a balloon (c) a clock to check (d) chalk to mark shadows
10. 10.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a glass of water (c) a battery cell (d) a sink or a bucket
11. 11.🍋 Secret message: who does this step — reading the message? (a) a child can do it (b) an adult does it
12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) warm water (c) a small bottle (d) dry yeast
13. 13.🧺 Which of these is needed for the paper helicopter? (a) a battery cell (b) a ruler (c) a magnet (d) a balloon
14. 14.🔬 Which step of the scientific method is this: “I think seeds need water to sprout.” (a) experiment (b) observation (c) hypothesis (d) conclusion
15. 15.True or false: “So seeds need water to sprout.” is the hypothesis step. (a) True (b) False
16. 16.🧺 Do we need a cotton bud for the secret lemon message? (a) not needed (b) needed
17. 17.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same place”? (a) we change it (b) we measure it (c) we keep it the same
18. 18.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) yeast (c) a sink or a bucket (d) a mirror
19. 19.⚖️ Fair test — do seeds need water to sprout? True or false: wet or dry cotton is the one thing we change. (a) False (b) True
20. 20.True or false: yeast is needed for the coloured flower experiment. (a) True (b) False
21. 21.🫧 Which of these is neutral? (a) vinegar (b) orange juice (c) plain water (d) curd
22. 22.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 10 cm (c) 5 cm (d) 40 cm
23. 23.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is what we measure? (a) the time we wait (b) amount of water drops (c) the kind of plant (d) sun or shade
24. 24.🧺 Which of these is needed for the periscope? (a) a pencil (b) a battery cell (c) vinegar (d) a balloon
25. 25.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) a sheet of white paper (c) a clear glass of water (d) a mirror
26. 26.🥚 A fresh egg sinks in plain water. What makes it float? (a) lots of salt stirred in (b) a little shaking (c) a few ice cubes (d) more plain water
27. 27.📘 What is the push of air on a falling thing called? (a) air resistance (b) magnetism (c) floating (d) dissolving
28. 28.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) water (c) air (d) smoke
29. 29.True or false: a rough wooden board reflects light well. (a) True (b) False
30. 30.🪴 Which part of a plant does this job: hold up the leaves? (a) stem (b) flower (c) roots (d) leaves
31. 31.❓ Which question can be tested by an experiment? (a) is music beautiful? (b) do magnets pull iron? (c) who is the best friend? (d) which colour is nicest?
32. 32.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) coins as the load (c) an empty thread reel (d) yeast
33. 33.💧 Why do water drops form on the outside of a glass of ice water? (a) the glass leaks (b) the glass sweats (c) vapour in air cools (d) ice escapes the glass
34. 34.🧺 Do we need a battery cell for the leafy bag test? (a) not needed (b) needed
35. 35.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) a friend who is running (d) nobody needs to
36. 36.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: sun or shade is what we measure. (a) False (b) True
37. 37.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the kind of flower is kept the same. (a) True (b) False
38. 38.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a ruler (b) turmeric powder (c) a pencil (d) a strip of paper
39. 39.True or false: turmeric powder is not needed for the balloon rocket. (a) False (b) True
40. 40.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a balloon (b) a mirror (c) vinegar (d) a tray for spills

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