Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 745 · 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.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a rubber band (b) a clear plastic bag (c) a potted plant (d) a battery cell
2. 2.📘 The browning of lemon juice with heat is a ___ change. (a) chemical (b) magnetic (c) physical (d) musical
3. 3.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
4. 4.True or false: white paper is not needed for the secret lemon message. (a) True (b) False
5. 5.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the same bottle (b) size of the balloon (c) the amount of vinegar (d) spoons of baking soda
6. 6.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) a battery cell (c) a tray for spills (d) a balloon
7. 7.🍋 Which of these steps is a job for an adult? (a) ironing the paper (b) writing the message (c) reading the message (d) dipping the cotton bud
8. 8.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
9. 9.🌱 Which of these is not needed for a seed to sprout? (a) warmth (b) air (c) water (d) salt
10. 10.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it wilts and droops (b) it flowers more (c) it turns blue (d) it grows faster
11. 11.🧺 Which of these is needed for the muddy water filter? (a) yeast (b) a funnel (c) a balloon (d) a magnet
12. 12.🫗 How do we separate salt from sea water? (a) evaporating (b) handpicking (c) winnowing (d) sieving
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) the amount of water (b) days to see crystals (c) sunny or shady place (d) the same dish
14. 14.🫧 Which of these is neutral? (a) sugar water (b) vinegar (c) lemon juice (d) detergent water
15. 15.True or false: soap solution keeps turmeric yellow. (a) True (b) False
16. 16.True or false: sand dissolves in water. (a) False (b) True
17. 17.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the kind of plant is kept the same. (a) True (b) False
18. 18.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a piece of string (c) a spoon (d) warm water
19. 19.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it shrinks (b) there is no change (c) it grows bigger (d) it turns blue
20. 20.🧈 Which of these is a change that can be undone? (a) rusting iron (b) cooking an egg (c) browning lemon ink (d) dissolving salt
21. 21.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) the hot sunny day (b) the cool cloudy day (c) neither of them (d) both the same
22. 22.🌱 What comes out of a moong seed first when it sprouts? (a) a thorn (b) a fruit (c) a flower (d) a tiny root
23. 23.🔍 Which is the odd one out? (a) warmth (b) water (c) salt (d) air
24. 24.🧺 Which of these is not needed for the muddy water filter? (a) a magnet (b) muddy water (c) cotton or cloth (d) a funnel
25. 25.🧺 Which of these is not needed for the fizzy balloon? (a) a comb (b) baking soda (c) a funnel or spoon (d) a balloon
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the amount of water (b) days to see crystals (c) sunny or shady place (d) the kind of salt
27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we measure it (c) we change it
28. 28.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) your best clothes (c) an old shirt or apron (d) a white party dress
29. 29.🧂 Which of these dissolves in water? (a) cooking oil (b) baking soda (c) sawdust (d) small pebbles
30. 30.🛟 The water for the yeast should be ___. (a) boiling hot (b) warm, not hot (c) very salty (d) ice cold
31. 31.True or false: sugar is needed for a seed to sprout. (a) False (b) True
32. 32.🧺 Which of these is needed for sprouting seeds? (a) a battery cell (b) cotton wool (c) a balloon (d) a mirror
33. 33.🛟 Why must the jar lid be screwed on tightly? (a) so air gets out (b) so it gets hot (c) so cream does not spill (d) so it turns yellow
34. 34.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a balloon (c) a magnet (d) a small bottle
35. 35.🌱 Which of these is needed for a seed to sprout? (a) soil (b) warmth (c) sunlight (d) sugar
36. 36.True or false: a few days is needed for sprouting seeds. (a) False (b) True
37. 37.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) keep it for a month (c) pour it down the sink (d) put it in your mouth
38. 38.True or false: vinegar is an acid. (a) False (b) True
39. 39.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
40. 40.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) blue words (b) a rainbow (c) dark brown words (d) almost nothing

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