Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 964 · 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.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a friend who is running (d) a grown-up
2. 2.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) crystals grow faster (d) it turns sweet
3. 3.🌱 Is water needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
4. 4.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we keep it the same (b) we measure it (c) we change it
5. 5.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) green (c) white at once (d) bright blue
6. 6.🔮 The fizzing stops after a while. Why? (a) the bottle got tired (b) an ingredient ran out (c) the balloon got cold (d) the gas froze
7. 7.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we change it (b) we keep it the same (c) we measure it
8. 8.🧺 Which of these is not needed for sprouting seeds? (a) a small bowl (b) moong seeds (c) a mirror (d) a few days
9. 9.🛟 Why must a plastic bag never go over anyone’s head? (a) it gets wet (b) it is too big (c) it changes colour (d) it can block breathing
10. 10.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
11. 11.🧂 Which of these dissolves in water? (a) table salt (b) sawdust (c) cooking oil (d) small pebbles
12. 12.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the kind of juice (b) the iron setting (c) how dark the writing is (d) the same paper
13. 13.⚖️ Fair test — do seeds need water to sprout? What do we do with “the number of seeds”? (a) we keep it the same (b) we change it (c) we measure it
14. 14.🔍 Which is the odd one out? (a) orange juice (b) lemon juice (c) vinegar (d) detergent water
15. 15.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) tiny water drops (b) salt crystals (c) tiny insects (d) nothing at all
16. 16.🧺 Which of these is needed for the fizzy balloon? (a) a tray for spills (b) a battery cell (c) a seed (d) a mirror
17. 17.True or false: melting butter is a change that can be undone. (a) False (b) True
18. 18.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) blue words (b) a rainbow (c) dark brown words (d) almost nothing
19. 19.📘 The browning of lemon juice with heat is a ___ change. (a) musical (b) physical (c) magnetic (d) chemical
20. 20.🌱 Which of these is not needed for a seed to sprout? (a) water (b) air (c) soil (d) warmth
21. 21.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) both the same (b) neither of them (c) the hot sunny day (d) the cool cloudy day
22. 22.True or false: a magnet is needed for the leafy bag test. (a) False (b) True
23. 23.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) fish make it (c) sand is ground up (d) salt rains down
24. 24.True or false: salt is not needed for a seed to sprout. (a) False (b) True
25. 25.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
26. 26.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
27. 27.🪴 Which of these is a job of the leaves? (a) take in water from soil (b) give out water vapour (c) carry water upward (d) make seeds
28. 28.🔮 Can the brown writing go back to being invisible? (a) no, it stays brown (b) yes, in the dark (c) yes, if cooled (d) yes, if shaken
29. 29.🔍 Which is the odd one out? (a) melting ice (b) folding paper (c) dissolving salt (d) cooking an egg
30. 30.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
31. 31.🛟 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
32. 32.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns green (c) it turns blue (d) it stays yellow
33. 33.True or false: a funnel is needed for the muddy water filter. (a) True (b) False
34. 34.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) a balloon (d) a comb
36. 36.🛟 Which safety rule fits the fizzy balloon experiment? (a) seal it in a glass jar (b) shake it near your face (c) keep it away from eyes (d) put it in your mouth
37. 37.True or false: turmeric powder is not needed for the yeast balloon. (a) False (b) True
38. 38.🌱 Will these sprout: boiled seeds? (a) sprouts (b) does not sprout
39. 39.True or false: a balloon is not needed for the muddy water filter. (a) False (b) True
40. 40.🧺 Do we need a comb for the fizzy balloon? (a) needed (b) not needed

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