Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 168 · 40 questions

What you do (Find the experiment, use the idea): 1. Read the question and find its experiment. 2. Use that experiment’s idea — acid and base, indicator colours, chemical change, what seeds and yeast need, transpiration, crystals or filtering. 3. For a fair-test question, find what is changed, kept the same and measured. 4. For a safety question, choose what keeps everyone safe.

1. 1.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it makes salt (b) it takes much longer (c) it turns pink (d) it is much faster
2. 2.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) seal it in a glass jar (c) keep it away from eyes (d) put it in your mouth
3. 3.⚖️ Fair test — do seeds need water to sprout? What do we do with “the kind of seeds”? (a) we change it (b) we measure it (c) we keep it the same
4. 4.⚖️ Fair test — do seeds need water to sprout? True or false: the same place is what we measure. (a) True (b) False
5. 5.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) frozen (c) magnetic (d) empty
6. 6.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it shrinks (b) it turns blue (c) it grows bigger (d) there is no change
7. 7.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
8. 8.🔍 Which is the odd one out? (a) sand (b) glucose powder (c) cooking oil (d) sawdust
9. 9.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) turmeric powder (c) a potted plant (d) a clear plastic bag
10. 10.🫗 Which of these is done by filtering? (a) bad grains from rice (b) tea leaves from tea (c) bran from wheat flour (d) sugar from sugar water
11. 11.True or false: sunlight is needed for the leafy bag test. (a) False (b) True
12. 12.True or false: freezing water is a change that can be undone. (a) False (b) True
13. 13.🔍 Which is the odd one out? (a) dissolving salt (b) melting ice (c) freezing water (d) browning lemon ink
14. 14.🌱 Will these sprout: seeds in the freezer? (a) sprouts (b) does not sprout
15. 15.True or false: detergent water is an acid. (a) True (b) False
16. 16.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it shrinks to nothing (c) it turns to bread (d) the balloon is smaller
17. 17.🔍 Which is the odd one out? (a) salt (b) sunlight (c) sugar (d) a magnet
18. 18.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) days to see crystals (b) sunny or shady place (c) the amount of water (d) the kind of salt
19. 19.True or false: lemon juice turns turmeric reddish-brown. (a) False (b) True
20. 20.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) dry yeast (c) warm water (d) a balloon
21. 21.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a battery cell (b) a cotton bud (c) an adult with an iron (d) a small bowl
22. 22.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we keep it the same (b) we measure it (c) we change it
23. 23.🧺 Which of these is needed for the secret lemon message? (a) yeast (b) white paper (c) a magnet (d) a balloon
24. 24.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) dissolving salt (c) cooking an egg (d) freezing water
25. 25.🔍 Which is the odd one out? (a) detergent water (b) curd (c) baking soda water (d) soap solution
26. 26.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) water evaporates (c) the dish melts (d) salt eats water
27. 27.🔍 Which is the odd one out? (a) melting ice (b) milk turning to curd (c) melting butter (d) freezing water
28. 28.🧂 Which of these dissolves in water? (a) cooking oil (b) small pebbles (c) food colour (d) chalk powder
29. 29.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the size of the plant is kept the same. (a) False (b) True
30. 30.🪴 Which part of a plant does this job: take in water from soil? (a) stem (b) leaves (c) roots (d) flower
31. 31.🛟 Why must a plastic bag never go over anyone’s head? (a) it gets wet (b) it can block breathing (c) it is too big (d) it changes colour
32. 32.🍋 Which of these steps is a job a child can do? (a) ironing the paper (b) writing the message (c) cutting the lemon (d) plugging in the iron
33. 33.⚖️ 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 keep it the same (c) we measure it
34. 34.⚖️ 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 change it (b) we keep it the same (c) we measure it
35. 35.🧺 Which of these is needed for making butter? (a) a bowl (b) a magnet (c) a balloon (d) a mirror
36. 36.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) turmeric powder (c) sugar (d) a paper clip
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a piece of string (c) a shallow dish (d) salt
38. 38.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) reddish (c) green (d) white at once
39. 39.🪴 Which part of a plant does this job: hold up the leaves? (a) flower (b) roots (c) leaves (d) stem
40. 40.🫧 Which of these is an acid? (a) salt water (b) detergent water (c) curd (d) soap solution

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