Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 905 · 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.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) feed them to pets (b) throw them at friends (c) never put seeds in mouth (d) eat a few to check
2. 2.🛟 Who should use the hot iron in the secret message experiment? (a) the youngest child (b) any child (c) only an adult (d) whoever is fastest
3. 3.🌱 Will these sprout: wet seeds by a window? (a) sprouts (b) does not sprout
4. 4.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) sugar water (c) salt water (d) detergent water
5. 5.🍋 Secret message: who does this step — plugging in the iron? (a) a child can do it (b) an adult does it
6. 6.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) very salty (d) warm, not hot
7. 7.⚖️ 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 kind of plant (c) the same kind of bag (d) sun or shade
8. 8.True or false: reading the message is a job a child can do. (a) True (b) False
9. 9.🧺 Which of these is needed for the secret lemon message? (a) turmeric powder (b) white paper (c) a magnet (d) a battery cell
10. 10.🧺 Which of these is not needed for the leafy bag test? (a) sunlight (b) a clear plastic bag (c) a battery cell (d) a potted plant
11. 11.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the ironing time is what we measure. (a) False (b) True
12. 12.🍋 Which of these steps is a job for an adult? (a) letting the paper dry (b) ironing the paper (c) reading the message (d) writing the message
13. 13.🧺 Which of these is needed for the turmeric test? (a) a comb (b) water (c) yeast (d) a battery cell
14. 14.🧺 Do we need yeast for sprouting seeds? (a) needed (b) not needed
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 measure it (b) we keep it the same (c) we change it
16. 16.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of water (b) the water temperature (c) the amount of sugar (d) size of the balloon
17. 17.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the amount poured”? (a) we change it (b) we measure it (c) we keep it the same
18. 18.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) the amount of cream (b) time to make butter (c) the same jar (d) the cream temperature
19. 19.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) your school uniform (c) an old shirt or apron (d) a white party dress
20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we change it (c) we keep it the same
21. 21.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
22. 22.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
23. 23.True or false: sugar water is neutral. (a) False (b) True
24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we measure it (c) we keep it the same
25. 25.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) there is no change (b) it turns blue (c) it grows bigger (d) it shrinks
26. 26.🍋 What colour does the lemon writing turn when an adult warms it? (a) blue (b) brown (c) green (d) white
27. 27.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the time we wait”? (a) we keep it the same (b) we measure it (c) we change it
28. 28.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the size of the plant”? (a) we keep it the same (b) we change it (c) we measure it
29. 29.🌱 Is soil needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
30. 30.🧺 Do we need a balloon for the muddy water filter? (a) needed (b) not needed
31. 31.🔍 Which is the odd one out? (a) warmth (b) water (c) air (d) salt
32. 32.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
33. 33.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “time to make butter”? (a) we change it (b) we keep it the same (c) we measure it
34. 34.🧺 Which of these is not needed for the leafy bag test? (a) yeast (b) a clear plastic bag (c) sunlight (d) a few hours
35. 35.🫗 Is filtered pond water safe to drink? (a) yes, always (b) yes, if it is clear (c) yes, if it is cold (d) no, germs may stay
36. 36.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it flowers more (b) it turns blue (c) it wilts and droops (d) it grows faster
37. 37.🛟 Which safety rule fits the fizzy balloon experiment? (a) seal it in a glass jar (b) put it in your mouth (c) keep it away from eyes (d) shake it near your face
38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) True (b) False
39. 39.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap is magnetic (c) soap water is a base (d) soap is hot
40. 40.🧺 Which of these is not needed for the turmeric test? (a) water (b) a magnet (c) white paper strips (d) turmeric powder

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