Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 196 · 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.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
2. 2.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is kept the same. (a) True (b) False
3. 3.True or false: plugging in the iron is a job for an adult. (a) False (b) True
4. 4.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) hot (b) clearer (c) muddier (d) salty
5. 5.True or false: a battery cell is needed for the fizzy balloon. (a) False (b) True
6. 6.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) turmeric powder (c) a battery cell (d) a balloon
7. 7.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) the youngest child (d) a friend who is running
8. 8.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
9. 9.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a battery cell (b) vinegar (c) baking soda (d) a tray for spills
10. 10.⚖️ 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 measure it (c) we keep it the same
11. 11.🍋 What colour does the lemon writing turn when an adult warms it? (a) white (b) blue (c) green (d) brown
12. 12.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) lemon juice (c) turmeric powder (d) a comb
13. 13.⚖️ Fair test — do seeds need water to sprout? True or false: how many seeds sprout is what we measure. (a) True (b) False
14. 14.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
15. 15.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “sun or shade”? (a) we keep it the same (b) we change it (c) we measure it
16. 16.⚖️ Fair test — do seeds need water to sprout? What do we do with “the kind of seeds”? (a) we change it (b) we keep it the same (c) we measure it
17. 17.🛟 How should the plastic bag be tied around the branch? (a) with sharp wire (b) with a hot glue gun (c) gently, not too tight (d) as tight as possible
18. 18.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it bursts at once (c) it grows much faster (d) it grows very little
19. 19.⚖️ 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 keep it the same (c) we measure it
20. 20.True or false: warm water is something yeast needs. (a) False (b) True
21. 21.🔍 Which is the odd one out? (a) salt (b) a magnet (c) sunlight (d) warm water
22. 22.🫗 Which of these is done by evaporating? (a) mud from water (b) bran from wheat flour (c) tea leaves from tea (d) sugar from sugar water
23. 23.True or false: bran from wheat flour is done by evaporating. (a) False (b) True
24. 24.🧈 What is the watery liquid left after the butter forms? (a) vinegar (b) oil (c) buttermilk (d) honey
25. 25.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is the one thing we change. (a) True (b) False
26. 26.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) yeast (c) soap solution (d) a magnet
27. 27.🔍 Which is the odd one out? (a) sunlight (b) vinegar (c) sugar (d) a magnet
28. 28.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny cubes (c) tiny triangles (d) tiny stars
29. 29.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) reddish-brown (c) it stays yellow (d) it turns blue
30. 30.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) a comb (c) an empty bottle (d) a tray for spills
31. 31.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
32. 32.🫗 Which of these is done by handpicking? (a) bad grains from rice (b) tea leaves from tea (c) mud from water (d) salt from sea water
33. 33.⚖️ 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 same kind of bag (c) sun or shade (d) the size of the plant
34. 34.True or false: a bowl is not needed for making butter. (a) False (b) True
35. 35.⚖️ 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 salt (b) sunny or shady place (c) days to see crystals (d) the amount of water
36. 36.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) vinegar (c) detergent water (d) plain water
37. 37.True or false: take in water from soil is a job of the leaves. (a) True (b) False
38. 38.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it turns blue (b) it shrinks (c) there is no change (d) it grows bigger
39. 39.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) nothing at all (b) salt crystals (c) tiny water drops (d) tiny insects
40. 40.⚖️ 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 change it (b) we measure it (c) we keep it the same

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