Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 881 · 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.🛟 Why must a plastic bag never go over anyone’s head? (a) it can block breathing (b) it is too big (c) it gets wet (d) it changes colour
2. 2.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
3. 3.🌱 Is salt needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
4. 4.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) an old shirt or apron (c) your best clothes (d) a white party dress
5. 5.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) False (b) True
6. 6.⚖️ 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 keep it the same (b) we change it (c) we measure it
7. 7.🧺 Do we need a balloon for the muddy water filter? (a) not needed (b) needed
8. 8.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
9. 9.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is kept the same. (a) False (b) True
10. 10.🧺 Which of these is needed for the secret lemon message? (a) turmeric powder (b) a magnet (c) a small bowl (d) a mirror
11. 11.🛟 Why is a plastic jar a good choice for shaking? (a) it is magnetic (b) it is heavier (c) it is hotter (d) it will not break
12. 12.🛟 What should you do after handling muddy water? (a) lick your fingers (b) wipe hands on face (c) wash hands afterwards (d) nothing is needed
13. 13.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they freeze (b) they become magnets (c) they float apart (d) they react
14. 14.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the size of the plant”? (a) we measure it (b) we change it (c) we keep it the same
15. 15.🧺 Which of these is needed for the turmeric test? (a) a comb (b) yeast (c) a dropper or spoon (d) a balloon
16. 16.True or false: salt is something yeast needs. (a) True (b) False
17. 17.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “how clear the water is”? (a) we keep it the same (b) we measure it (c) we change it
18. 18.🧺 Which of these is needed for the leafy bag test? (a) a battery cell (b) a rubber band (c) yeast (d) a mirror
19. 19.🫧 Is soap solution an acid, a base or neutral? (a) neutral (b) an acid (c) a base
20. 20.🧺 Do we need a tray for spills for the fizzy balloon? (a) needed (b) not needed
21. 21.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the same glass (b) the same funnel (c) how clear the water is (d) the same muddy water
22. 22.True or false: small stones from dal is done by sieving. (a) False (b) True
23. 23.True or false: plain water is neutral. (a) True (b) False
24. 24.🌱 Which of these is not needed for a seed to sprout? (a) salt (b) water (c) air (d) warmth
25. 25.📘 What is yeast? (a) a kind of salt (b) a kind of sugar (c) a tiny living fungus (d) a kind of stone
26. 26.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a spoon (d) yeast
28. 28.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
29. 29.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) water (b) a balloon (c) moong seeds (d) cotton wool
30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the liquid we test (c) the turmeric paper
31. 31.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it grows very little (c) it bursts at once (d) it turns yellow
32. 32.True or false: an empty bottle is needed for the fizzy balloon. (a) False (b) True
33. 33.🧺 Which of these is needed for making butter? (a) a mirror (b) yeast (c) turmeric powder (d) a timer
34. 34.🔍 Which is the odd one out? (a) baking soda water (b) lemon juice (c) soap solution (d) detergent water
35. 35.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we measure it (b) we keep it the same (c) we change it
36. 36.🪴 Which part of a plant does this job: carry water upward? (a) roots (b) stem (c) leaves (d) flower
37. 37.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the salt (b) the mud (c) the water (d) nothing
38. 38.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) pour it down the sink (c) put it in your mouth (d) keep it for a month
39. 39.⚖️ 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 keep it the same (b) we change it (c) we measure it
40. 40.🧺 Do we need a magnet for the fizzy balloon? (a) needed (b) not needed

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