Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 71 · 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.🔭 At what angle are the mirrors set in a simple periscope? (a) 10 degrees (b) 180 degrees (c) 45 degrees (d) 90 degrees
2. 2.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) on a bed (c) near a plug point (d) over a laptop
3. 3.🧺 Which of these is needed for making butter? (a) a mirror (b) a timer (c) a magnet (d) yeast
4. 4.🛟 Static from a comb is safe. Which electricity must children never play with? (a) paper bits on a comb (b) a rubbed plastic comb (c) plug points at home (d) a rubbed balloon
5. 5.True or false: tiny paper bits is not needed for the static comb. (a) True (b) False
6. 6.🍋 Why does the lemon writing turn brown with heat? (a) the juice scorches first (b) heat adds colour (c) paper turns lemony (d) the iron is brown
7. 7.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a shadow of ice (b) a small rainbow (c) snow falling (d) a magnet
8. 8.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) a battery cell (d) a pencil and tape
9. 9.True or false: vinegar is needed for the magnet test. (a) False (b) True
10. 10.🍋 Which of these steps is a job for an adult? (a) dipping the cotton bud (b) plugging in the iron (c) reading the message (d) writing the message
11. 11.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) reddish (c) bright blue (d) green
12. 12.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) water (b) yeast (c) moong seeds (d) a few days
13. 13.True or false: paper with folded edges makes a strong bridge. (a) True (b) False
14. 14.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) lemon juice (c) detergent water (d) plain water
15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the liquid we test (c) the colour we see (d) the light we look in
16. 16.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) lemon juice (c) a small bowl (d) a battery cell
17. 17.🔍 What do you see after pouring honey, water and oil into one glass? (a) the glass gets hot (b) bubbles of gas (c) one mixed colour (d) three separate layers
18. 18.🧺 Do we need a jar with a tight lid for making butter? (a) needed (b) not needed
19. 19.🛟 Does a ping-pong ball float or sink in water? (a) floats (b) sinks
20. 20.True or false: a piece of thermocol floats on water. (a) False (b) True
21. 21.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) water (b) a balloon (c) a small bowl (d) cotton wool
22. 22.🛟 Before starting any experiment, what is the first safety step? (a) start right away (b) skip the reading (c) ask an adult (d) hide it from adults
23. 23.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they may swallow them (c) they are magnetic (d) they are too shiny
24. 24.🧺 Which of these is not needed for the dissolving test? (a) two clear glasses (b) honey (c) sugar (d) cold water
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) the lifting height (c) the same cup of coins (d) number of pulleys
26. 26.🌈 In VIBGYOR, what number colour is indigo?
27. 27.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a magnet (c) yeast (d) salt
28. 28.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
29. 29.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a magnet (b) a stiff postcard (c) a sink or a bucket (d) a glass of water
30. 30.⚙️ Which of these uses a pulley? (a) a crowbar (b) a sloping road (c) a well pulley (d) a ramp
31. 31.🧺 Which of these is not needed for the float-or-sink test? (a) a results table (b) a towel for spills (c) small test objects (d) a mirror
32. 32.🔬 In the scientific method, which step number is “do the experiment”?
33. 33.True or false: vinegar is needed for the leafy bag test. (a) True (b) False
34. 34.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? What do we do with “the order of pouring”? (a) we change it (b) we measure it (c) we keep it the same
35. 35.True or false: an open sheet of paper falls slowly through the air. (a) False (b) True
36. 36.True or false: a fridge magnet works by magnetism. (a) False (b) True
37. 37.💧 Which of these lets water climb up it? (a) a flower stem (b) a piece of foil (c) a glass marble (d) a plastic ruler
38. 38.📘 What is water vapour? (a) tiny ice cubes (b) water as a gas (c) salty water (d) a kind of smoke
39. 39.🔍 Which is the odd one out? (a) dipping the cotton bud (b) writing the message (c) reading the message (d) plugging in the iron
40. 40.🔮 Predict: the gap between the books gets wider. The bridge holds ___. (a) the same coins (b) only water (c) fewer coins (d) more coins

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