Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 798 · 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.🫗 How do we separate bad grains from rice? (a) sieving (b) evaporating (c) winnowing (d) handpicking
2. 2.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it turns to bread (c) the balloon is bigger (d) it shrinks to nothing
3. 3.True or false: folding paper is a change that can be undone. (a) True (b) False
4. 4.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the same kind of bag is what we measure. (a) True (b) False
5. 5.🍋 Secret message: who does this step — cutting the lemon? (a) a child can do it (b) an adult does it
6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) True (b) False
7. 7.🫧 Is baking soda water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
8. 8.True or false: a battery cell is needed for making butter. (a) True (b) False
9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the colour we see (c) the turmeric paper (d) the number of drops
10. 10.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) a mirror (c) a funnel or spoon (d) baking soda
11. 11.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) how dark the writing is (b) the kind of juice (c) the ironing time
12. 12.True or false: tamarind water is a base. (a) False (b) True
13. 13.🔍 Which is the odd one out? (a) freezing water (b) baking a cake (c) melting ice (d) dissolving salt
14. 14.True or false: seeds on wet cotton does not sprout. (a) True (b) False
15. 15.🛟 Why must a plastic bag never go over anyone’s head? (a) it is too big (b) it gets wet (c) it can block breathing (d) it changes colour
16. 16.True or false: a clear plastic bag is needed for the leafy bag test. (a) True (b) False
17. 17.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) muddy water (c) yeast (d) sand and pebbles
18. 18.🪴 Which of these is a job of the roots? (a) carry water upward (b) take in water from soil (c) make seeds (d) give out water vapour
19. 19.True or false: soil is not needed for a seed to sprout. (a) True (b) False
20. 20.🧺 Which of these is needed for the fizzy balloon? (a) a mirror (b) baking soda (c) a magnet (d) a comb
21. 21.🧺 Do we need a seed for the fizzy balloon? (a) needed (b) not needed
22. 22.🧺 Do we need turmeric powder for the muddy water filter? (a) needed (b) not needed
23. 23.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) an acid (c) neutral
24. 24.🪴 Which part of a plant does this job: take in water from soil? (a) leaves (b) roots (c) flower (d) stem
25. 25.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) stomata (b) roots (c) veins (d) petals
26. 26.🔍 Which is the odd one out? (a) air (b) salt (c) warmth (d) water
27. 27.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: how hard we shake is kept the same. (a) False (b) True
28. 28.🟡 Which of these turns turmeric reddish-brown? (a) detergent water (b) lemon juice (c) sugar water (d) vinegar
29. 29.True or false: curd is a base. (a) False (b) True
30. 30.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
31. 31.⚖️ 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
32. 32.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) an adult with an iron (c) yeast (d) lemon juice
33. 33.🧺 Which of these is needed for the leafy bag test? (a) a magnet (b) a battery cell (c) turmeric powder (d) a clear plastic bag
34. 34.True or false: a magnet is something yeast does not need. (a) False (b) True
35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we measure it (c) we change it
36. 36.🛟 Why must the jar lid be screwed on tightly? (a) so it turns yellow (b) so it gets hot (c) so air gets out (d) so cream does not spill
37. 37.🛟 What should you do after touching soil or seeds? (a) rub your eyes (b) lick your fingers (c) wash your hands (d) skip washing
38. 38.🧈 Which of these is a change that cannot be undone? (a) rusting iron (b) freezing water (c) folding paper (d) dissolving salt
39. 39.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a battery cell (c) turmeric powder (d) a magnet
40. 40.🫗 Which of these is done by evaporating? (a) tea leaves from tea (b) bran from wheat flour (c) gravel from fine sand (d) sugar from sugar water

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