Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 858 · 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.🍋 What colour does the lemon writing turn when an adult warms it? (a) blue (b) green (c) white (d) brown
2. 2.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we measure it (b) we change it (c) we keep it the same
3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the light we look in (b) the colour we see (c) the liquid we test (d) the turmeric paper
4. 4.🧺 Which of these is not needed for the fizzy balloon? (a) a balloon (b) a mirror (c) an empty bottle (d) a funnel or spoon
5. 5.🫧 Which of these is a base? (a) baking soda water (b) sugar water (c) plain water (d) orange juice
6. 6.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) spoons of baking soda (b) the same bottle (c) size of the balloon
7. 7.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a bowl (b) fresh cream (c) cold water to rinse (d) turmeric powder
8. 8.🪴 Which part of a plant does this job: hold the plant in soil? (a) flower (b) roots (c) stem (d) leaves
9. 9.🛟 Why should you never drink water just because it looks clear? (a) clear water is salty (b) germs are invisible (c) clear water is hot (d) clear water is sweet
10. 10.🔮 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
11. 11.🧂 Which of these dissolves in water? (a) glucose powder (b) cooking oil (c) small pebbles (d) sawdust
12. 12.True or false: vinegar is something yeast needs. (a) False (b) True
13. 13.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the mud (b) nothing (c) the water (d) the salt
14. 14.🍋 Which of these steps is a job for an adult? (a) dipping the cotton bud (b) letting the paper dry (c) writing the message (d) plugging in the iron
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) the amount of water (c) the same dish (d) days to see crystals
16. 16.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) next to the baby (c) on the edge of a table (d) safe from small children
17. 17.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) lemon juice (d) baking soda water
18. 18.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we change it (b) we measure it (c) we keep it the same
19. 19.🍋 Which of these steps is a job a child can do? (a) reading the message (b) cutting the lemon (c) plugging in the iron (d) putting the iron away
20. 20.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) rusting iron (d) dissolving salt
21. 21.📘 What do we call a seed starting to grow? (a) condensation (b) germination (c) pollination (d) evaporation
22. 22.🧺 Which of these is not needed for making butter? (a) cold water to rinse (b) a timer (c) turmeric powder (d) a jar with a tight lid
23. 23.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) a friend who is running (c) the youngest child (d) nobody needs to
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) salt (c) a shallow dish (d) warm water
25. 25.⚖️ 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
26. 26.🛟 Why is a plastic jar a good choice for shaking? (a) it is magnetic (b) it will not break (c) it is hotter (d) it is heavier
27. 27.🔍 Which is the odd one out? (a) letting the paper dry (b) ironing the paper (c) putting the iron away (d) cutting the lemon
28. 28.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the amount poured (b) how clear the water is (c) the filter material (d) the same muddy water
29. 29.True or false: sawdust dissolves in water. (a) False (b) True
30. 30.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a balloon (b) a jar with a tight lid (c) a bowl (d) cold water to rinse
31. 31.🌱 Which of these sprouts in a few days? (a) seeds in the freezer (b) seeds on dry cotton (c) boiled seeds (d) wet seeds by a window
32. 32.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
33. 33.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
34. 34.📘 The browning of lemon juice with heat is a ___ change. (a) chemical (b) physical (c) musical (d) magnetic
35. 35.True or false: vinegar is needed for the leafy bag test. (a) False (b) True
36. 36.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
37. 37.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns green (c) it turns blue (d) reddish-brown
38. 38.🧺 Do we need fresh cream for making butter? (a) needed (b) not needed
39. 39.True or false: yeast is not needed for the secret lemon message. (a) False (b) True
40. 40.🛟 Why must the jar lid be screwed on tightly? (a) so air gets out (b) so cream does not spill (c) so it turns yellow (d) so it gets hot

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids