Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 943 · 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.🍋 Why can’t you see the lemon writing once it dries? (a) the paper ate it (b) dry juice is see-through (c) it turned into air (d) the ink is magnetic
2. 2.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the same muddy water (b) the same funnel (c) the filter material (d) how clear the water is
3. 3.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
4. 4.True or false: a magnet is something yeast needs. (a) False (b) True
5. 5.🧈 Which of these is a change that can be undone? (a) baking a cake (b) rusting iron (c) cooking an egg (d) melting butter
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a balloon (c) a piece of string (d) a shallow dish
7. 7.🍋 Which of these steps is a job for an adult? (a) writing the message (b) plugging in the iron (c) dipping the cotton bud (d) letting the paper dry
8. 8.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we change it (b) we keep it the same (c) we measure it
9. 9.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we change it (b) we measure it (c) we keep it the same
10. 10.⚖️ 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) amount of water drops (b) the size of the plant (c) sun or shade (d) the same kind of bag
11. 11.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) turmeric powder (b) a timer (c) a bowl (d) cold water to rinse
12. 12.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
13. 13.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) cold water to rinse (b) a timer (c) a bowl (d) a mirror
14. 14.True or false: browning lemon ink is a change that cannot be undone. (a) True (b) False
15. 15.🧺 Which of these is needed for sprouting seeds? (a) moong seeds (b) a magnet (c) a balloon (d) yeast
16. 16.🔍 Which is the odd one out? (a) letting the paper dry (b) cutting the lemon (c) putting the iron away (d) ironing the paper
17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we keep it the same (c) we measure it
18. 18.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is what we measure. (a) True (b) False
19. 19.🪴 Which of these is a job of the stem? (a) make seeds (b) hold up the leaves (c) take in water from soil (d) make food in sunlight
20. 20.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) a base (c) an acid
21. 21.🧺 Which of these is needed for the leafy bag test? (a) vinegar (b) a magnet (c) turmeric powder (d) sunlight
22. 22.True or false: salt is not needed for a seed to sprout. (a) True (b) False
23. 23.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap is an acid (c) soap water is a base (d) soap is magnetic
24. 24.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we change it (b) we keep it the same (c) we measure it
25. 25.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) liquid crystals (c) no crystals (d) smaller crystals
26. 26.True or false: folding paper is a change that cannot be undone. (a) True (b) False
27. 27.True or false: vinegar is a base. (a) False (b) True
28. 28.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) a balloon (c) cotton or cloth (d) a funnel
29. 29.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) green (c) bright blue (d) reddish
30. 30.🫧 Which of these is an acid? (a) soap solution (b) sugar water (c) curd (d) salt water
31. 31.🧺 Which of these is needed for the secret lemon message? (a) an adult with an iron (b) turmeric powder (c) a mirror (d) a balloon
32. 32.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) the kind of seeds (b) the number of seeds (c) how many seeds sprout (d) the same place
33. 33.True or false: detergent water is a base. (a) True (b) False
34. 34.🪴 Which part of a plant does this job: make seeds? (a) stem (b) flower (c) leaves (d) roots
35. 35.True or false: sugar water is neutral. (a) True (b) False
36. 36.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we measure it (b) we change it (c) we keep it the same
37. 37.🧺 Which of these is needed for the leafy bag test? (a) yeast (b) a rubber band (c) turmeric powder (d) a battery cell
38. 38.🔍 Which is the odd one out? (a) warm water (b) time (c) salt (d) sugar
39. 39.🧺 Do we need a mirror for the muddy water filter? (a) not needed (b) needed
40. 40.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the same funnel (b) how clear the water is (c) the same muddy water (d) the filter material

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