Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 613 · 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 must children keep their fingers away from the iron? (a) it is sticky (b) it can burn skin (c) it is cold (d) it is magnetic
2. 2.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is what we measure. (a) True (b) False
3. 3.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
4. 4.True or false: melting butter is a change that cannot be undone. (a) True (b) False
5. 5.True or false: wet seeds in the dark sprouts in a few days. (a) False (b) True
6. 6.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
7. 7.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) water (c) a dropper or spoon (d) white paper strips
8. 8.True or false: take in water from soil is a job of the roots. (a) True (b) False
9. 9.🫗 Which of these is done by winnowing? (a) bad grains from rice (b) sugar from sugar water (c) husk from rice grain (d) tea leaves from tea
10. 10.🧺 Which of these is needed for the fizzy balloon? (a) a magnet (b) an empty bottle (c) a seed (d) sugar
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) False (b) True
12. 12.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
13. 13.🔍 Which is the odd one out? (a) sunlight (b) warm water (c) sugar (d) time
14. 14.📘 The browning of lemon juice with heat is a ___ change. (a) musical (b) chemical (c) magnetic (d) physical
15. 15.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) keep it for a month (c) throw it at a wall (d) pour it down the sink
16. 16.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
17. 17.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “amount of water drops”? (a) we measure it (b) we change it (c) we keep it the same
18. 18.True or false: a funnel or spoon is needed for the fizzy balloon. (a) False (b) True
19. 19.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) a prism (c) an indicator (d) a magnet
20. 20.True or false: a funnel is not needed for the muddy water filter. (a) False (b) True
21. 21.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) warm, not hot (d) very salty
22. 22.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) sugar (c) a magnet (d) warm water
23. 23.True or false: baking soda does not dissolve in water. (a) True (b) False
24. 24.🫗 Which of these is done by filtering? (a) tea leaves from tea (b) husk from rice grain (c) salt from sea water (d) gravel from fine sand
25. 25.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) it turns blue (b) no butter forms (c) more butter forms (d) it turns to cheese
26. 26.True or false: rusting iron is a change that can be undone. (a) False (b) True
27. 27.True or false: seeds on wet cotton does not sprout. (a) True (b) False
28. 28.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) the amount of cream (b) time to make butter (c) the cream temperature
29. 29.🔍 Which is the odd one out? (a) sugar (b) vinegar (c) time (d) warm water
30. 30.True or false: yeast is not needed for the leafy bag test. (a) True (b) False
31. 31.🧺 Do we need yeast for making butter? (a) not needed (b) needed
32. 32.🧺 Do we need a magnet for the secret lemon message? (a) needed (b) not needed
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) sunny or shady place (c) the same dish (d) the amount of salt
34. 34.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is the one thing we change. (a) False (b) True
35. 35.🛟 Why must a plastic bag never go over anyone’s head? (a) it is too big (b) it can block breathing (c) it gets wet (d) it changes colour
36. 36.🍞 Which of these is something yeast needs? (a) a magnet (b) vinegar (c) salt (d) sugar
37. 37.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) the amount of yeast (c) size of the balloon (d) the same bottles
38. 38.True or false: tamarind water is neutral. (a) True (b) False
39. 39.🪴 Which of these is a job of the flower? (a) hold up the leaves (b) take in water from soil (c) make seeds (d) make food in sunlight
40. 40.🔮 Predict: you stop shaking after only one minute. What do you have? (a) ghee (b) butter lumps (c) still runny cream (d) cheese

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