Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 958 · 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: you use more vinegar and more baking soda. What happens to the balloon? (a) there is no change (b) it shrinks (c) it turns blue (d) it grows bigger
2. 2.True or false: seeds on wet cotton does not sprout. (a) True (b) False
3. 3.True or false: salt is not needed for a seed to sprout. (a) False (b) True
4. 4.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a few days (b) cotton wool (c) turmeric powder (d) moong seeds
5. 5.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) both stay behind (b) leaves pass through (c) tea stays behind (d) leaves stay behind
6. 6.True or false: table salt dissolves in water. (a) False (b) True
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) sunny or shady place (c) the same dish
8. 8.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
9. 9.True or false: a mirror is not needed for the leafy bag test. (a) False (b) True
10. 10.True or false: sugar is not needed for the fizzy balloon. (a) False (b) True
11. 11.🍞 Which of these is something yeast needs? (a) sunlight (b) vinegar (c) a magnet (d) warm water
12. 12.🛟 Which safety rule fits the fizzy balloon experiment? (a) seal it in a glass jar (b) put it in your mouth (c) keep it away from eyes (d) shake it near your face
13. 13.⚖️ 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) the amount of salt (b) the kind of salt (c) sunny or shady place (d) the amount of water
14. 14.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the kind of plant is what we measure. (a) True (b) False
15. 15.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is what we measure. (a) False (b) True
16. 16.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) the kind of seeds (b) wet or dry cotton (c) the same bowls (d) how many seeds sprout
17. 17.🌱 Will these sprout: wet seeds in the dark? (a) does not sprout (b) sprouts
18. 18.🔮 Predict: you stop shaking after only one minute. What do you have? (a) ghee (b) still runny cream (c) butter lumps (d) cheese
19. 19.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny triangles (c) tiny cubes (d) tiny stars
20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the light we look in (c) the liquid we test
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we keep it the same (b) we change it (c) we measure it
22. 22.True or false: vinegar is not needed for the fizzy balloon. (a) False (b) True
23. 23.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
24. 24.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
25. 25.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a balloon (b) a funnel or spoon (c) a comb (d) a tray for spills
26. 26.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) melting ice (c) baking a cake (d) rusting iron
27. 27.🧺 Which of these is needed for the fizzy balloon? (a) a magnet (b) an empty bottle (c) a seed (d) a mirror
28. 28.True or false: soap solution turns turmeric reddish-brown. (a) True (b) False
29. 29.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: amount of water drops is what we measure. (a) False (b) True
30. 30.📘 What do we call a seed starting to grow? (a) condensation (b) pollination (c) evaporation (d) germination
31. 31.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
32. 32.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we measure it (b) we keep it the same (c) we change it
33. 33.🟡 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
34. 34.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
35. 35.🔍 Which is the odd one out? (a) sunlight (b) sugar (c) time (d) warm water
36. 36.True or false: seeds in the freezer does not sprout. (a) True (b) False
37. 37.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
38. 38.🔍 Which is the odd one out? (a) plugging in the iron (b) ironing the paper (c) writing the message (d) putting the iron away
39. 39.🧺 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
40. 40.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the amount of vinegar (b) spoons of baking soda (c) the same bottle (d) the kind of balloon

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