Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 74 · 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.True or false: chalk powder does not dissolve in water. (a) False (b) True
2. 2.🧺 Which of these is needed for the float-or-sink test? (a) a balloon (b) a battery cell (c) turmeric powder (d) a towel for spills
3. 3.🧺 Which of these is needed for the secret lemon message? (a) lemon juice (b) a battery cell (c) yeast (d) a magnet
4. 4.🛟 Which rule keeps you safe when working with sunlight? (a) never look at the Sun (b) look at it through glass (c) look at it in a mirror (d) stare at the Sun
5. 5.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) air pushing up (c) the cold water (d) a magnet
6. 6.True or false: a mirror is needed for the fizzy balloon. (a) False (b) True
7. 7.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same string is what we measure. (a) False (b) True
8. 8.🔭 Who uses a periscope to look above the water? (a) a pilot in a plane (b) a baker (c) a farmer (d) a submarine crew
9. 9.⚖️ Fair test — which paper shape holds the most coins? True or false: the shape of the paper is what we measure. (a) False (b) True
10. 10.🏗️ Where does a temple dome get its strength from? (a) tubes (b) arches and domes (c) triangles
11. 11.⚡ Which big natural spark is caused by static electricity? (a) the wind (b) lightning (c) a rainbow (d) dew
12. 12.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) bright sunlight (c) a mirror (d) a clear glass of water
13. 13.⚡ Which of these does not move to a charged comb? (a) a heavy book (b) tiny paper bits (c) puffed rice (d) a thin water stream
14. 14.🔦 Which of these is opaque? (a) clean water (b) clear glass (c) a wooden board (d) air
15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a comb (c) sugar (d) warm water
16. 16.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) water with food colour (b) a tall clear glass (c) a balloon (d) honey
17. 17.⚖️ Fair test — which paper shape holds the most coins? What do we do with “the kind of paper”? (a) we measure it (b) we change it (c) we keep it the same
18. 18.⚖️ Fair test — does rubbing the comb more times pick up more paper bits? Which of these is what we measure? (a) number of rubs (b) the same comb (c) distance to the paper (d) paper bits picked up
19. 19.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the water turns to ice (c) the card flies away (d) the card stays on
20. 20.🔍 Which is the odd one out? (a) a thin water stream (b) a heavy book (c) a steel spoon (d) a brick
21. 21.💧 Dip a cotton thread into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
22. 22.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) small test objects (b) a tub of water (c) a towel for spills (d) turmeric powder
23. 23.🧺 Do we need cooking oil for the density tower? (a) not needed (b) needed
24. 24.🛟 Which of these is an unsafe habit? (a) asking an adult first (b) reading the steps first (c) washing hands afterwards (d) mixing random liquids
25. 25.🧺 Which of these is needed for the periscope? (a) an empty juice carton (b) vinegar (c) a magnet (d) turmeric powder
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we change it (c) we measure it
27. 27.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) the amount of water (c) days to see crystals
28. 28.True or false: an iron nail floats on water. (a) True (b) False
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is the one thing we change. (a) False (b) True
30. 30.⚖️ What is the turning point of a lever called? (a) the axle (b) the fulcrum (c) the effort (d) the load
31. 31.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) which side goes down (b) the number of coins (c) distance from the pencil
32. 32.🔬 In the scientific method, which step number is “make a hypothesis”?
33. 33.🔍 Which is the odd one out? (a) baking soda (b) table salt (c) small pebbles (d) food colour
34. 34.🌉 Why does a zigzag-folded sheet hold more coins than a flat one? (a) folds are magnetic (b) folds make it stiffer (c) folds make it wet (d) folds add glue
35. 35.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is kept the same? (a) the room it stands in (b) time for colour to show (c) the length of the stem
36. 36.🍋 Secret message: who does this step — cutting the lemon? (a) a child can do it (b) an adult does it
37. 37.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
38. 38.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we measure it (b) we change it (c) we keep it the same
39. 39.🔬 In the scientific method, which step number is “do the experiment”?
40. 40.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a bottle opener (c) a see-saw (d) a well pulley

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