Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 677 · 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 should you never drink water just because it looks clear? (a) clear water is sweet (b) clear water is hot (c) germs are invisible (d) clear water is salty
2. 2.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
3. 3.🧺 Do we need fresh cream for making butter? (a) not needed (b) needed
4. 4.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
5. 5.True or false: air is not needed for a seed to sprout. (a) True (b) False
6. 6.True or false: a cotton bud is not needed for the secret lemon message. (a) True (b) False
7. 7.⚖️ 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 keep it the same (c) we measure it
8. 8.📘 The browning of lemon juice with heat is a ___ change. (a) physical (b) musical (c) chemical (d) magnetic
9. 9.⚖️ 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) the same kind of bag (b) amount of water drops (c) the kind of plant (d) sun or shade
10. 10.⚖️ Fair test — do seeds need water to sprout? True or false: the kind of seeds is kept the same. (a) True (b) False
11. 11.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) size of the balloon (c) the amount of water
12. 12.🧺 Which of these is not needed for the fizzy balloon? (a) baking soda (b) a mirror (c) vinegar (d) a balloon
13. 13.🧈 What is the watery liquid left after the butter forms? (a) honey (b) vinegar (c) oil (d) buttermilk
14. 14.🧺 Which of these is needed for the secret lemon message? (a) a small bowl (b) turmeric powder (c) a magnet (d) a balloon
15. 15.🍋 Why can’t you see the lemon writing once it dries? (a) the ink is magnetic (b) dry juice is see-through (c) the paper ate it (d) it turned into air
16. 16.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap is magnetic (c) soap is hot (d) soap water is a base
17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
18. 18.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
19. 19.🛟 How should the plastic bag be tied around the branch? (a) as tight as possible (b) with sharp wire (c) with a hot glue gun (d) gently, not too tight
20. 20.🪴 Which part of a plant does this job: hold up the leaves? (a) roots (b) stem (c) flower (d) leaves
21. 21.True or false: hold the plant in soil is a job of the roots. (a) True (b) False
22. 22.🔍 Which is the odd one out? (a) baking soda water (b) salt water (c) soap solution (d) detergent water
23. 23.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a paper clip (c) dry yeast (d) turmeric powder
24. 24.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is the one thing we change. (a) False (b) True
25. 25.🛟 What should you do after handling muddy water? (a) lick your fingers (b) wash hands afterwards (c) nothing is needed (d) wipe hands on face
26. 26.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the amount of vinegar (b) size of the balloon (c) the same bottle (d) spoons of baking soda
27. 27.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) nothing at all (b) tiny water drops (c) salt crystals (d) tiny insects
28. 28.🔍 Which is the odd one out? (a) ironing the paper (b) dipping the cotton bud (c) putting the iron away (d) cutting the lemon
29. 29.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your school uniform (c) your best clothes (d) an old shirt or apron
30. 30.🧺 Which of these is not needed for making butter? (a) cold water to rinse (b) a timer (c) a jar with a tight lid (d) turmeric powder
31. 31.🧈 Which of these is a change that can be undone? (a) rusting iron (b) cooking an egg (c) melting butter (d) milk turning to curd
32. 32.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
33. 33.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we keep it the same (b) we measure it (c) we change it
34. 34.🧺 Which of these is needed for the muddy water filter? (a) yeast (b) a clean glass (c) a magnet (d) a balloon
35. 35.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to oil (c) it turns to butter (d) sugar crystals form
36. 36.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is what we measure. (a) True (b) False
37. 37.True or false: a battery cell is needed for the turmeric test. (a) False (b) True
38. 38.🫗 How do we separate sugar from sugar water? (a) winnowing (b) filtering (c) handpicking (d) evaporating
39. 39.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it makes salt (b) it takes much longer (c) it turns pink (d) it is much faster
40. 40.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) a rubber band (c) yeast (d) a clear plastic bag

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