Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 17 · 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.🔮 A big log and a small pebble go into a pond. Which one floats? (a) neither of them (b) both of them (c) the big log (d) the small pebble
2. 2.⚖️ Fair test — do seeds need water to sprout? True or false: the same place is kept the same. (a) False (b) True
3. 3.🧺 Which of these is not needed for the density tower? (a) cooking oil (b) honey (c) turmeric powder (d) a spoon
4. 4.🧺 Three of these are needed for the static comb. Which one is NOT needed? (a) a plastic comb (b) a balloon (c) yeast (d) tiny paper bits
5. 5.🚀 In “push back, move forward”, which way does the balloon go? (a) goes backward (b) goes forward
6. 6.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) in the honey layer (b) under the honey (c) on top of the oil (d) in the water layer
7. 7.⚖️ Fair test — how does the shadow of a stick change through the day? What do we do with “the stick kept upright”? (a) we measure it (b) we change it (c) we keep it the same
8. 8.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: time to make butter is what we measure. (a) True (b) False
9. 9.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “time to reach the floor”? (a) we measure it (b) we change it (c) we keep it the same
10. 10.⚡ Which of these jumps to a charged comb? (a) a heavy book (b) a pebble (c) a steel spoon (d) puffed rice
11. 11.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
12. 12.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is the one thing we change. (a) False (b) True
13. 13.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a mirror (c) a sheet of white paper (d) a sunny window
14. 14.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
15. 15.🔍 Which is the odd one out? (a) running with glassware (b) mixing random liquids (c) reading the steps first (d) touching a hot iron
16. 16.🌼 How does coloured water reach the petals? (a) it is sprayed on (b) through tiny stem tubes (c) it rains on them (d) through the air
17. 17.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) salt (c) a balloon (d) a magnet
18. 18.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) a small bowl (c) a cotton bud (d) a magnet
19. 19.🔦 Is clear glass opaque, translucent or transparent? (a) translucent (b) opaque (c) transparent
20. 20.💧 Which of these does not let water climb? (a) a cotton thread (b) a sugar cube (c) a rubber eraser (d) a paper towel
21. 21.🧺 Do we need a sheet of white paper for the water rainbow? (a) needed (b) not needed
22. 22.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) tamarind water (d) detergent water
23. 23.True or false: “So seeds need water to sprout.” is the hypothesis step. (a) True (b) False
24. 24.🧺 Which of these is needed for making butter? (a) turmeric powder (b) a mirror (c) cold water to rinse (d) a battery cell
25. 25.🧺 Which of these is not needed for the coloured flower experiment? (a) a glass of water (b) a white flower (c) a few hours of waiting (d) a balloon
26. 26.True or false: vinegar is a base. (a) True (b) False
27. 27.🛟 What should you wear for a long time in the hot sun? (a) a woollen sweater (b) nothing on your head (c) a cap or hat (d) a raincoat
28. 28.🔮 Predict: the gap between the books gets wider. The bridge holds ___. (a) more coins (b) only water (c) the same coins (d) fewer coins
29. 29.True or false: a balloon is not needed for the muddy water filter. (a) True (b) False
30. 30.🔮 Predict: the Sun is low in the evening sky. The stick’s shadow is ___. (a) short (b) missing (c) round (d) long
31. 31.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the shape of the clay is what we measure. (a) False (b) True
32. 32.🛟 Which is the safe way to do the float-or-sink test? (a) wipe up spills at once (b) leave water on the floor (c) play near a deep pond (d) run around the tub
33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is the one thing we change. (a) False (b) True
34. 34.True or false: a small cup is needed for the water cycle bowl. (a) False (b) True
35. 35.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) keep it for a month (c) throw it at a wall (d) pour it down the sink
36. 36.🧺 Which of these is not needed for the balloon rocket? (a) two chairs (b) a long string (c) a drinking straw (d) yeast
37. 37.⚖️ Fair test — does the angle of the mirrors change how clearly you see? Which of these is what we measure? (a) the same mirrors (b) the object we look at (c) the angle of the mirrors (d) how clear the view is
38. 38.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the card stays on (c) the water turns to ice (d) the card flies away
39. 39.🎈 When does the balloon rocket stop? (a) when it gets cold (b) when the air runs out (c) it never stops (d) when it turns blue
40. 40.🧺 Which of these is needed for the shadow clock? (a) a battery cell (b) a balloon (c) a magnet (d) a clock to check

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