Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 764 · 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 a plant in the sun give out more water than one in the shade? True or false: sun or shade is kept the same. (a) True (b) False
2. 2.True or false: a comb is not needed for the fizzy balloon. (a) False (b) True
3. 3.🛟 Why should you never drink water just because it looks clear? (a) clear water is hot (b) clear water is salty (c) clear water is sweet (d) germs are invisible
4. 4.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) the kind of plant (b) the size of the plant (c) sun or shade (d) amount of water drops
5. 5.True or false: warm water is needed for the yeast balloon. (a) False (b) True
6. 6.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
7. 7.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) nothing at all (b) salt crystals (c) tiny insects (d) tiny water drops
8. 8.⚖️ 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 the one thing we change. (a) True (b) False
9. 9.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the time we wait is the one thing we change. (a) True (b) False
10. 10.True or false: mud from water is done by filtering. (a) True (b) False
11. 11.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
12. 12.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it makes salt (b) it takes much longer (c) it is much faster (d) it turns pink
13. 13.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a timer (b) a jar with a tight lid (c) cold water to rinse (d) a battery cell
14. 14.🍋 What colour does the lemon writing turn when an adult warms it? (a) green (b) blue (c) white (d) brown
15. 15.True or false: cooking oil dissolves in water. (a) True (b) False
16. 16.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) an empty bottle (b) baking soda (c) sugar (d) a balloon
17. 17.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a mirror (c) a magnet (d) a balloon
18. 18.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
19. 19.🫗 How do we separate salt from sea water? (a) handpicking (b) evaporating (c) winnowing (d) sieving
20. 20.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a magnet (c) a balloon (d) a shallow dish
21. 21.🫗 Is filtered pond water safe to drink? (a) yes, if it is clear (b) yes, always (c) yes, if it is cold (d) no, germs may stay
22. 22.🫧 Which of these is neutral? (a) orange juice (b) salt water (c) soap solution (d) baking soda water
23. 23.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
24. 24.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
25. 25.True or false: dissolving salt is a change that can be undone. (a) True (b) False
26. 26.🧺 Do we need a timer for making butter? (a) not needed (b) needed
27. 27.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is the one thing we change. (a) False (b) True
28. 28.🫗 Which of these is done by evaporating? (a) salt from sea water (b) tea leaves from tea (c) gravel from fine sand (d) mud from water
29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) True (b) False
30. 30.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it turns to sand (b) it sinks to the bottom (c) it floats on top (d) it dissolves
31. 31.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) lick your fingers (b) wash your hands (c) rub your eyes (d) skip washing
32. 32.🧺 Do we need water for sprouting seeds? (a) not needed (b) needed
33. 33.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) green (c) reddish (d) white at once
34. 34.🫧 Which of these is a base? (a) vinegar (b) sugar water (c) tamarind water (d) detergent water
35. 35.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) an acid (c) a base
36. 36.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is kept the same. (a) True (b) False
37. 37.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is kept the same. (a) True (b) False
38. 38.🫗 Which of these is done by sieving? (a) bran from wheat flour (b) salt from sea water (c) tea leaves from tea (d) chaff from wheat grain
39. 39.🌱 Will these sprout: boiled seeds? (a) sprouts (b) does not sprout
40. 40.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to clean floors (c) to make bread rise (d) to colour rice

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