Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 536 · 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.🧺 Do we need a magnet for the secret lemon message? (a) not needed (b) needed
2. 2.⚖️ 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 change it (c) we keep it the same
3. 3.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
4. 4.🍋 Why can’t you see the lemon writing once it dries? (a) the ink is magnetic (b) it turned into air (c) dry juice is see-through (d) the paper ate it
5. 5.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) sun or shade (b) the kind of plant (c) amount of water drops
6. 6.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) no, salt passes through (b) yes, all of it (c) it turns to sugar (d) it turns to sand
7. 7.True or false: a battery cell is not needed for the yeast balloon. (a) False (b) True
8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we measure it (c) we change it
9. 9.True or false: dipping the cotton bud is a job a child can do. (a) True (b) False
10. 10.True or false: a battery cell is not needed for sprouting seeds. (a) False (b) True
11. 11.True or false: baking soda water is neutral. (a) False (b) True
12. 12.True or false: an empty bottle is not needed for the fizzy balloon. (a) True (b) False
13. 13.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a comb (c) a dropper or spoon (d) white paper strips
14. 14.⚖️ 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 the one thing we change. (a) True (b) False
15. 15.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) safe from small children (d) on the edge of a table
16. 16.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
17. 17.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it grows much faster (c) it turns yellow (d) it bursts at once
18. 18.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the kind of balloon (b) size of the balloon (c) the same bottle (d) spoons of baking soda
19. 19.🌱 Which of these does not sprout? (a) wet seeds by a window (b) seeds on dry cotton (c) wet seeds in the dark (d) seeds on wet cotton
20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we keep it the same (c) we change it
21. 21.True or false: freezing water is a change that can be undone. (a) True (b) False
22. 22.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) no butter forms (b) it turns blue (c) more butter forms (d) it turns to cheese
23. 23.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a magnet (c) dry yeast (d) a balloon
24. 24.🫗 Which of these is done by handpicking? (a) gravel from fine sand (b) bad grains from rice (c) chaff from wheat grain (d) sugar from sugar water
25. 25.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) salt crystals (b) tiny water drops (c) tiny insects (d) nothing at all
26. 26.True or false: a mirror is not needed for the turmeric test. (a) False (b) True
27. 27.🌱 Where does a sprouting seed get its first food from? (a) food stored in the seed (b) the air (c) the sunlight only (d) the cotton wool
28. 28.True or false: a battery cell is needed for sprouting seeds. (a) True (b) False
29. 29.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: how clear the water is is kept the same. (a) False (b) True
30. 30.🧺 Do we need an empty bottle for the fizzy balloon? (a) needed (b) not needed
31. 31.🫧 Which of these is neutral? (a) curd (b) vinegar (c) plain water (d) tamarind water
32. 32.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) it shrinks to nothing (c) the balloon is bigger (d) the balloon is smaller
33. 33.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) False (b) True
34. 34.🛟 Why should you never drink water just because it looks clear? (a) clear water is hot (b) germs are invisible (c) clear water is sweet (d) clear water is salty
35. 35.True or false: sugar is not needed for a seed to sprout. (a) False (b) True
36. 36.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) a rubber band (c) sunlight (d) yeast
37. 37.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) cotton wool (b) moong seeds (c) a few days (d) turmeric powder
38. 38.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a few days (b) a small bowl (c) cotton wool (d) a battery cell
39. 39.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) reddish (c) white at once (d) bright blue
40. 40.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it

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