Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 959 · 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 use the hot iron in the secret message experiment? (a) whoever is fastest (b) only an adult (c) any child (d) the youngest child
2. 2.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
3. 3.True or false: letting the paper dry is a job a child can do. (a) False (b) True
4. 4.🧺 Which of these is not needed for the secret lemon message? (a) an adult with an iron (b) a small bowl (c) a battery cell (d) a cotton bud
5. 5.⚖️ 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) the same dish (c) the amount of salt (d) days to see crystals
6. 6.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is what we measure? (a) the kind of plant (b) the same kind of bag (c) amount of water drops (d) the time we wait
7. 7.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “sun or shade”? (a) we measure it (b) we change it (c) we keep it the same
8. 8.🛟 What should you do if vinegar splashes in your eye? (a) rinse with clean water (b) ignore it (c) add baking soda (d) rub it hard
9. 9.True or false: lemon juice is not needed for the secret lemon message. (a) True (b) False
10. 10.🌱 Which of these sprouts in a few days? (a) boiled seeds (b) seeds in the freezer (c) seeds on wet cotton (d) seeds on dry cotton
11. 11.True or false: a few days is needed for sprouting seeds. (a) False (b) True
12. 12.True or false: a magnet is not needed for the leafy bag test. (a) False (b) True
13. 13.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the water (b) the mud (c) nothing (d) the salt
14. 14.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the ironing time is kept the same. (a) False (b) True
15. 15.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) water (b) moong seeds (c) a balloon (d) a few days
16. 16.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they become magnets (b) they freeze (c) they float apart (d) they react
17. 17.True or false: melting ice is a change that cannot be undone. (a) True (b) False
18. 18.True or false: yeast is not needed for the leafy bag test. (a) False (b) True
19. 19.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is the one thing we change. (a) False (b) True
20. 20.True or false: ironing the paper is a job for an adult. (a) False (b) True
21. 21.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
22. 22.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it fizz (c) to cool the water (d) to make it very salty
23. 23.🧺 Which of these is needed for the fizzy balloon? (a) a balloon (b) a mirror (c) a battery cell (d) a comb
24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) True (b) False
25. 25.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) the hot sunny day (b) the cool cloudy day (c) both the same (d) neither of them
26. 26.🧂 Which of these does not dissolve in water? (a) glucose powder (b) food colour (c) sugar (d) cooking oil
27. 27.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
28. 28.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a spoon (c) a shallow dish (d) salt
30. 30.🔍 Which is the odd one out? (a) food colour (b) cooking oil (c) sugar (d) baking soda
31. 31.🛟 What should you do after handling muddy water? (a) wash hands afterwards (b) nothing is needed (c) lick your fingers (d) wipe hands on face
32. 32.True or false: a balloon is needed for the fizzy balloon. (a) False (b) True
33. 33.True or false: bran from wheat flour is done by sieving. (a) True (b) False
34. 34.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a magnet (c) a mirror (d) a piece of string
35. 35.🔍 Which is the odd one out? (a) glucose powder (b) chalk powder (c) food colour (d) table salt
36. 36.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) the kind of balloon (b) size of the balloon (c) spoons of baking soda
37. 37.True or false: vinegar is not needed for the fizzy balloon. (a) False (b) True
38. 38.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
39. 39.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) a balloon (c) water (d) soap solution
40. 40.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) it turns to sand (b) yes, all of it (c) no, salt passes through (d) it turns to sugar

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