Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 122 · 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.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
2. 2.🧈 Which of these is a change that can be undone? (a) baking a cake (b) rusting iron (c) browning lemon ink (d) folding paper
3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the number of drops (c) the liquid we test (d) the light we look in
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we measure it (b) we change it (c) we keep it the same
5. 5.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is the one thing we change. (a) False (b) True
6. 6.True or false: turmeric powder is not needed for the secret lemon message. (a) True (b) False
7. 7.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) time to make butter (b) the same jar (c) the cream temperature
8. 8.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it turns pink (b) it makes salt (c) it is much faster (d) it takes much longer
9. 9.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is what we measure. (a) False (b) True
10. 10.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “time to make butter”? (a) we change it (b) we keep it the same (c) we measure it
11. 11.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) the kind of seeds (b) wet or dry cotton (c) the same bowls (d) the number of seeds
12. 12.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
13. 13.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a tray for spills (b) vinegar (c) a magnet (d) a funnel or spoon
14. 14.🧺 Do we need a funnel or spoon for the fizzy balloon? (a) not needed (b) needed
15. 15.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) keep it for a month (d) pour it down the sink
16. 16.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
17. 17.🧈 Which of these is a change that can be undone? (a) freezing water (b) cooking an egg (c) browning lemon ink (d) rusting iron
18. 18.🫧 Which of these is a base? (a) salt water (b) orange juice (c) sugar water (d) detergent water
19. 19.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) neutral (c) a base
20. 20.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the amount of cream”? (a) we measure it (b) we change it (c) we keep it the same
21. 21.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) a funnel (c) a magnet (d) sand and pebbles
22. 22.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) a battery cell (c) a clear plastic bag (d) a rubber band
23. 23.🔮 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
24. 24.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap water is a base (c) soap is hot (d) soap is magnetic
25. 25.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
26. 26.True or false: a magnet is needed for the secret lemon message. (a) False (b) True
27. 27.🧺 Which of these is needed for making butter? (a) a jar with a tight lid (b) yeast (c) a balloon (d) turmeric powder
28. 28.True or false: putting the iron away is a job a child can do. (a) True (b) False
29. 29.🧂 Which of these dissolves in water? (a) chalk powder (b) food colour (c) sawdust (d) small pebbles
30. 30.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
31. 31.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) use only kitchen items (c) sip each liquid (d) sniff each bottle hard
32. 32.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) sun or shade (b) amount of water drops (c) the size of the plant
33. 33.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same muddy water is kept the same. (a) True (b) False
34. 34.🧺 Do we need sugar for the fizzy balloon? (a) not needed (b) needed
35. 35.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
36. 36.🍋 Which of these steps is a job a child can do? (a) writing the message (b) cutting the lemon (c) ironing the paper (d) putting the iron away
37. 37.True or false: curd is a base. (a) False (b) True
38. 38.True or false: white paper is needed for the secret lemon message. (a) True (b) False
39. 39.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is smaller (c) the balloon is bigger (d) it shrinks to nothing
40. 40.True or false: salt is something yeast does not need. (a) True (b) False

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