Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 20 · 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.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to win a prize (b) to hide the corks (c) to keep children safe (d) to splash everyone
2. 2.True or false: a dull brick reflects light well. (a) False (b) True
3. 3.🔮 Predict: the gap between the books gets wider. The bridge holds ___. (a) more coins (b) the same coins (c) only water (d) fewer coins
4. 4.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
5. 5.🔍 Which is the odd one out? (a) a glass marble (b) a coin (c) very salty water (d) cooking oil
6. 6.🧺 Do we need a mirror for the shadow clock? (a) not needed (b) needed
7. 7.🧺 Which of these is not needed for the water cycle bowl? (a) sunlight (b) a small cup (c) a battery cell (d) a big bowl
8. 8.💧 Dip a piece of chalk into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
9. 9.🥚 Why is an egg hard to crush when you press on its two ends? (a) it is made of steel (b) it is very hot (c) it is magnetic (d) its curved arch shape
10. 10.🔦 Is a brick opaque, translucent or transparent? (a) opaque (b) transparent (c) translucent
11. 11.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) the weight of the bob
12. 12.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the kind of plant”? (a) we measure it (b) we change it (c) we keep it the same
13. 13.True or false: a battery cell is not needed for sprouting seeds. (a) False (b) True
14. 14.True or false: a mirror is not needed for the pendulum. (a) True (b) False
15. 15.🔍 Which is the odd one out? (a) black cloth (b) a dull brick (c) a rough wooden board (d) a mirror
16. 16.🔍 Which is the odd one out? (a) sugar (b) table salt (c) baking soda (d) chalk powder
17. 17.🔍 Which is the odd one out? (a) snow turning to water (b) ice becoming water (c) butter going runny (d) sweat drying on skin
18. 18.🔍 Which is the odd one out? (a) a coin (b) a cork (c) a ping-pong ball (d) an ice cube
19. 19.True or false: very salty water is denser than water. (a) True (b) False
20. 20.🔮 Predict: you make more, closer zigzag folds. The bridge holds ___ coins. (a) more (b) zero (c) the same number of (d) fewer
21. 21.🔍 Which layer is on top in the honey-water-oil tower? (a) honey (b) the spoon (c) cooking oil (d) coloured water
22. 22.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) magnets (b) balloons (c) clouds (d) prisms
23. 23.True or false: a balloon is needed for the paper helicopter. (a) True (b) False
24. 24.⚖️ Fair test — which paper shape holds the most coins? Which of these is kept the same? (a) the shape of the paper (b) the kind of coins (c) coins it holds
25. 25.🌈 Why does sunlight make a rainbow through a glass of water? (a) the glass is painted (b) the paper makes colours (c) the water is coloured (d) water splits the light
26. 26.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) warm water (b) a teaspoon (c) sugar (d) cotton wool
27. 27.True or false: boiled seeds does not sprout. (a) False (b) True
28. 28.🧺 Do we need a battery cell for the muddy water filter? (a) not needed (b) needed
29. 29.🛟 Which is the safe way to do the float-or-sink test? (a) run around the tub (b) play near a deep pond (c) wipe up spills at once (d) leave water on the floor
30. 30.True or false: cooking oil dissolves in water. (a) False (b) True
31. 31.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) a balloon (c) yeast (d) a mirror
32. 32.🧺 Which of these is needed for the dissolving test? (a) two clear glasses (b) a mirror (c) cotton wool (d) a magnet
33. 33.🧺 Do we need a battery cell for the water rainbow? (a) not needed (b) needed
34. 34.🧺 Which of these is not needed for the secret lemon message? (a) a magnet (b) lemon juice (c) white paper (d) a small bowl
35. 35.🧺 Do we need muddy water for the muddy water filter? (a) not needed (b) needed
36. 36.🥚 A fresh egg sinks in plain water. What makes it float? (a) a little shaking (b) a few ice cubes (c) lots of salt stirred in (d) more plain water
37. 37.🧺 Which of these is not needed for the paper helicopter? (a) a ruler (b) a pencil (c) turmeric powder (d) a strip of paper
38. 38.🧺 Do we need a magnet for the leafy bag test? (a) not needed (b) needed
39. 39.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is kept the same? (a) the length of the blades (b) time to reach the floor (c) the person dropping
40. 40.🛟 Why must a plastic bag never go over anyone’s head? (a) it changes colour (b) it gets wet (c) it can block breathing (d) it is too big

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