Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 639 · 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.🛟 Which safety rule fits the fizzy balloon experiment? (a) keep it away from eyes (b) shake it near your face (c) seal it in a glass jar (d) put it in your mouth
2. 2.🧺 Which of these is not needed for making butter? (a) a jar with a tight lid (b) a timer (c) a mirror (d) a bowl
3. 3.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) skip washing (b) lick your fingers (c) rub your eyes (d) wash your hands
4. 4.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) warm, not hot (d) boiling hot
5. 5.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the amount of yeast (c) the water temperature
6. 6.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
7. 7.🔍 Which is the odd one out? (a) rusting iron (b) browning lemon ink (c) milk turning to curd (d) folding paper
8. 8.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
9. 9.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) cooking an egg (c) rusting iron (d) folding paper
10. 10.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) a base (c) neutral
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we keep it the same (b) we change it (c) we measure it
12. 12.🛟 Why must a plastic bag never go over anyone’s head? (a) it is too big (b) it gets wet (c) it changes colour (d) it can block breathing
13. 13.🧺 Do we need a balloon for sprouting seeds? (a) needed (b) not needed
14. 14.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) bigger crystals (d) smaller crystals
15. 15.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “how hard we shake”? (a) we change it (b) we measure it (c) we keep it the same
16. 16.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we keep it the same (b) we measure it (c) we change it
17. 17.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we keep it the same (b) we change it (c) we measure it
18. 18.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap is hot (c) soap is magnetic (d) soap water is a base
19. 19.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) an empty bottle (b) a tray for spills (c) a battery cell (d) vinegar
20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the liquid we test (c) the light we look in (d) the turmeric paper
21. 21.🔍 Which is the odd one out? (a) putting the iron away (b) cutting the lemon (c) ironing the paper (d) dipping the cotton bud
22. 22.🧺 Do we need a small bowl for the secret lemon message? (a) not needed (b) needed
23. 23.🧺 Do we need baking soda for the fizzy balloon? (a) needed (b) not needed
24. 24.🪴 Which of these is a job of the leaves? (a) make seeds (b) hold up the leaves (c) hold the plant in soil (d) give out water vapour
25. 25.🔍 What do you see after shaking cream in a jar for a long time? (a) bubbles of gas (b) clear water only (c) lumps of butter (d) sugar crystals
26. 26.True or false: freezing water is a change that can be undone. (a) False (b) True
27. 27.🧺 Which of these is needed for making butter? (a) yeast (b) a jar with a tight lid (c) a balloon (d) a mirror
28. 28.True or false: yeast is not needed for making butter. (a) True (b) False
29. 29.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) vinegar (d) sugar
30. 30.🧺 Do we need a jar with a tight lid for making butter? (a) needed (b) not needed
31. 31.🌱 Is soil needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
32. 32.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is what we measure. (a) True (b) False
33. 33.True or false: a clear plastic bag is not needed for the leafy bag test. (a) False (b) True
34. 34.🍋 Secret message: who does this step — plugging in the iron? (a) a child can do it (b) an adult does it
35. 35.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the ironing time is the one thing we change. (a) False (b) True
36. 36.🍋 Which of these steps is a job for an adult? (a) letting the paper dry (b) dipping the cotton bud (c) writing the message (d) putting the iron away
37. 37.True or false: a mirror is not needed for the secret lemon message. (a) True (b) False
38. 38.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a magnet (c) a mirror (d) a shallow dish
39. 39.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a magnet (c) a paper clip (d) dry yeast
40. 40.🧂 Which of these does not dissolve in water? (a) food colour (b) sugar (c) baking soda (d) small pebbles

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