Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 36 · 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.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they all turn green (b) they fall off at once (c) they stay white (d) they turn two colours
2. 2.📘 Rubbing moves tiny charges. What do we call the charge that builds up? (a) gravity (b) sunlight (c) static electricity (d) magnetism
3. 3.True or false: a steering wheel is a wheel and axle. (a) False (b) True
4. 4.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is the one thing we change? (a) the amount of water (b) the room it stands in (c) the length of the stem (d) the kind of flower
5. 5.⚖️ Fair test — does a stronger magnet pull a paper clip through more sheets of paper? What do we do with “the magnet used”? (a) we keep it the same (b) we change it (c) we measure it
6. 6.🧺 Which of these is needed for the secret lemon message? (a) a balloon (b) a magnet (c) a small bowl (d) a battery cell
7. 7.🧺 Do we need turmeric powder for the shadow clock? (a) not needed (b) needed
8. 8.True or false: a magnet is not needed for the water rainbow. (a) True (b) False
9. 9.True or false: a roof frame gets its strength from triangles. (a) False (b) True
10. 10.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) yeast (c) a mirror (d) a stiff postcard
11. 11.🧺 Do we need a magnet for the periscope? (a) not needed (b) needed
12. 12.🧺 Do we need a battery cell for the secret lemon message? (a) not needed (b) needed
13. 13.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) a clean glass (c) sand and pebbles (d) a mirror
14. 14.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) no butter forms (b) more butter forms (c) it turns blue (d) it turns to cheese
15. 15.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we change it (b) we measure it (c) we keep it the same
16. 16.🧺 Which of these is needed for the shadow clock? (a) a magnet (b) yeast (c) a clock to check (d) a balloon
17. 17.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it floats away (b) it turns all red (c) the rainbow fades (d) it turns brighter
18. 18.🧺 Do we need a magnet for the balloon rocket? (a) not needed (b) needed
19. 19.🧺 Do we need a magnet for the fizzy balloon? (a) needed (b) not needed
20. 20.🧺 Do we need two small mirrors for the periscope? (a) needed (b) not needed
21. 21.🛟 Why should we wipe up spilled oil at once? (a) oil turns into honey (b) spilled oil is slippery (c) oil attracts magnets (d) oil makes it rain
22. 22.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the time we wait”? (a) we change it (b) we keep it the same (c) we measure it
23. 23.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is what we measure? (a) time to dissolve (b) the water temperature (c) the amount of water (d) the kind of sugar
24. 24.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the same funnel (b) the filter material (c) how clear the water is
25. 25.True or false: a magnet is not needed for the shadow clock. (a) True (b) False
26. 26.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) neither of them (b) both the same (c) the hot sunny day (d) the cool cloudy day
27. 27.True or false: plugging in the iron is a job a child can do. (a) False (b) True
28. 28.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a bottle opener (c) a crowbar (d) a well pulley
29. 29.🍯 Which of these is less dense than water? (a) very salty water (b) a coin (c) a pebble (d) a ping-pong ball
30. 30.True or false: a mirror is not needed for the static comb. (a) False (b) True
31. 31.⚖️ Fair test — does a stronger magnet pull a paper clip through more sheets of paper? Which of these is the one thing we change? (a) the kind of paper (b) the same paper clip (c) the same table (d) the magnet used
32. 32.True or false: a bicycle pump works by air pressure. (a) True (b) False
33. 33.🔍 Which is the odd one out? (a) a ball of clay (b) a ping-pong ball (c) a coin (d) a metal key
34. 34.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the amount of water”? (a) we change it (b) we keep it the same (c) we measure it
35. 35.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is what we measure. (a) False (b) True
36. 36.🔍 Which is the odd one out? (a) a crumpled paper ball (b) a coin (c) a feather (d) a glass marble
37. 37.🛟 Which of these is a safe habit? (a) asking an adult first (b) mixing random liquids (c) touching a hot iron (d) running with glassware
38. 38.⚡ Which of these does not move to a charged comb? (a) a brick (b) puffed rice (c) tiny paper bits (d) dry hair
39. 39.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 2 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
40. 40.🌈 How many colours do we name in a rainbow (VIBGYOR)?

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