Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 913 · 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.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) the size of the plant (b) amount of water drops (c) sun or shade (d) the time we wait
2. 2.🛟 Why is a plastic jar a good choice for shaking? (a) it will not break (b) it is hotter (c) it is heavier (d) it is magnetic
3. 3.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it grows bigger (b) it shrinks (c) there is no change (d) it turns blue
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) turmeric powder (c) a shallow dish (d) a piece of string
5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) warm water (d) turmeric powder
6. 6.True or false: baking soda water is neutral. (a) True (b) False
7. 7.🪴 Which of these is a job of the stem? (a) make seeds (b) hold up the leaves (c) hold the plant in soil (d) take in water from soil
8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) True (b) False
9. 9.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) no butter forms (b) more butter forms (c) it turns to cheese (d) it turns blue
10. 10.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) False (b) True
12. 12.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns red (c) it turns black (d) it stays yellow
13. 13.True or false: a battery cell is needed for the muddy water filter. (a) True (b) False
14. 14.🔍 Which is the odd one out? (a) curd (b) tamarind water (c) lemon juice (d) plain water
15. 15.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) cold water to rinse (b) a bowl (c) a timer (d) yeast
16. 16.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) milk turning to curd (c) browning lemon ink (d) dissolving salt
17. 17.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
18. 18.🔍 Which is the odd one out? (a) milk turning to curd (b) melting butter (c) folding paper (d) freezing water
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) days to see crystals (c) the amount of water (d) the kind of salt
20. 20.True or false: boiled seeds does not sprout. (a) False (b) True
21. 21.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a piece of string (c) a battery cell (d) a spoon
23. 23.True or false: a battery cell is not needed for the leafy bag test. (a) False (b) True
24. 24.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the iron setting (b) how dark the writing is (c) the kind of juice
25. 25.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
26. 26.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) put it in your mouth (c) throw it at a wall (d) keep it for a month
27. 27.True or false: letting the paper dry is a job a child can do. (a) True (b) False
28. 28.⚖️ Fair test — do seeds need water to sprout? What do we do with “the number of seeds”? (a) we measure it (b) we keep it the same (c) we change it
29. 29.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) a mirror (c) lemon juice (d) a dropper or spoon
30. 30.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a mirror (b) a cotton bud (c) lemon juice (d) an adult with an iron
31. 31.🪴 Which part of a plant does this job: hold the plant in soil? (a) roots (b) flower (c) leaves (d) stem
32. 32.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) salt (c) turmeric powder (d) a magnet
33. 33.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns green (c) it turns blue (d) reddish-brown
34. 34.🛟 What should you do after handling muddy water? (a) nothing is needed (b) wipe hands on face (c) wash hands afterwards (d) lick your fingers
35. 35.True or false: a mirror is needed for the leafy bag test. (a) False (b) True
36. 36.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
37. 37.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) dark brown words (b) blue words (c) almost nothing (d) a rainbow
38. 38.📘 What is yeast? (a) a tiny living fungus (b) a kind of salt (c) a kind of stone (d) a kind of sugar
39. 39.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
40. 40.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True

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