Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 904 · 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.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is what we measure. (a) False (b) True
2. 2.🛟 What should you do after touching soil or seeds? (a) rub your eyes (b) lick your fingers (c) skip washing (d) wash your hands
3. 3.🧺 Do we need a balloon for making butter? (a) not needed (b) needed
4. 4.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) nobody needs to (d) a grown-up
5. 5.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) crystals grow faster (c) it fizzes (d) it turns sweet
6. 6.True or false: tea leaves from tea is done by filtering. (a) True (b) False
7. 7.🟡 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
8. 8.True or false: yeast is needed for the muddy water filter. (a) False (b) True
9. 9.🌱 Seeds need water, air and ___ to sprout. (a) sugar (b) soil (c) warmth (d) salt
10. 10.🧺 Which of these is not needed for the fizzy balloon? (a) vinegar (b) a funnel or spoon (c) a magnet (d) a balloon
11. 11.🧺 Do we need a magnet for the leafy bag test? (a) not needed (b) needed
12. 12.⚖️ 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 time we wait (c) sun or shade (d) amount of water drops
13. 13.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the kind of balloon is the one thing we change. (a) True (b) False
14. 14.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) liquid crystals (c) no crystals (d) smaller crystals
15. 15.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) melting ice (c) folding paper (d) cooking an egg
16. 16.🛟 What should you do after handling muddy water? (a) wash hands afterwards (b) nothing is needed (c) wipe hands on face (d) lick your fingers
17. 17.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
18. 18.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) time to make butter (b) the cream temperature (c) how hard we shake (d) the same jar
19. 19.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the same bottles (c) the water temperature
20. 20.True or false: a magnet is needed for the muddy water filter. (a) True (b) False
21. 21.🪴 Which of these is a job of the roots? (a) hold up the leaves (b) make seeds (c) take in water from soil (d) give out water vapour
22. 22.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we change it (b) we measure it (c) we keep it the same
23. 23.🧺 Do we need a potted plant for the leafy bag test? (a) not needed (b) needed
24. 24.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) reddish-brown (c) green (d) it stays white
25. 25.True or false: sand does not dissolve in water. (a) False (b) True
26. 26.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a mirror (b) soap solution (c) lemon juice (d) a dropper or spoon
27. 27.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) use only kitchen items (c) mix bathroom cleaners (d) sip each liquid
28. 28.True or false: turmeric powder is not needed for the leafy bag test. (a) False (b) True
29. 29.🔮 Predict: you use plain water instead of vinegar. What happens? (a) the balloon bursts (b) very little fizzing (c) a huge eruption (d) it turns to honey
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a balloon (c) salt (d) a shallow dish
31. 31.True or false: a small bowl is not needed for the secret lemon message. (a) False (b) True
32. 32.True or false: sugar is needed for the fizzy balloon. (a) True (b) False
33. 33.🌱 What comes out of a moong seed first when it sprouts? (a) a thorn (b) a fruit (c) a tiny root (d) a flower
34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the light we look in (b) the liquid we test (c) the colour we see
35. 35.🫧 Which of these is an acid? (a) sugar water (b) detergent water (c) soap solution (d) lemon juice
36. 36.True or false: yeast is needed for growing salt crystals. (a) False (b) True
37. 37.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the kind of plant”? (a) we measure it (b) we change it (c) we keep it the same
38. 38.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) turmeric powder (b) moong seeds (c) cotton wool (d) water
39. 39.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a balloon (c) sugar (d) a mirror
40. 40.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) roots (b) veins (c) petals (d) stomata

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