Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 863 · 40 questions

What you do (Dry out, crystals in): 1. An adult pours warm water into a cup. 2. Stir in salt, a spoon at a time, until no more dissolves. 3. Pour the salty water into a shallow dish and lay a string in it. 4. Leave it on a sunny windowsill, out of reach of small children, and check each day.

1. 1.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) melting butter (c) melting ice (d) freezing water
2. 2.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
3. 3.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
4. 4.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
5. 5.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) sunny or shady place (c) the amount of water
6. 6.True or false: folding paper is a change that cannot be undone. (a) True (b) False
7. 7.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a balloon (c) warm water (d) a mirror
8. 8.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) the kind of salt (b) the same dish (c) the amount of water (d) sunny or shady place
9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) salt (c) warm water (d) a spoon
10. 10.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) on the edge of a table (d) next to the baby
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) False (b) True
12. 12.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) baking a cake (c) dissolving salt (d) cooking an egg
13. 13.🧂 Which of these dissolves in water? (a) chalk powder (b) sand (c) glucose powder (d) cooking oil
14. 14.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True
15. 15.True or false: warm water is needed for growing salt crystals. (a) False (b) True
16. 16.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
17. 17.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
18. 18.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) crystals grow faster (c) it turns sweet (d) few or no crystals
19. 19.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) sugar crystals form (c) it turns to butter (d) salt crystals form
20. 20.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) dissolving salt (c) melting butter (d) folding paper
21. 21.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a magnet (c) a spoon (d) turmeric powder
22. 22.🔍 Which is the odd one out? (a) food colour (b) sawdust (c) sand (d) cooking oil
23. 23.🧈 Which of these is a change that can be undone? (a) melting ice (b) cooking an egg (c) rusting iron (d) milk turning to curd
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) warm water (d) yeast
25. 25.🧂 Which of these does not dissolve in water? (a) food colour (b) table salt (c) sand (d) glucose powder
26. 26.🧂 Which of these does not dissolve in water? (a) baking soda (b) glucose powder (c) food colour (d) chalk powder
27. 27.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) the youngest child (d) a grown-up
28. 28.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
29. 29.⚖️ 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 measure it (c) we change it
30. 30.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
31. 31.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
32. 32.True or false: glucose powder does not dissolve in water. (a) True (b) False
33. 33.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny cubes (c) tiny triangles (d) tiny stars
34. 34.🔍 Which is the odd one out? (a) small pebbles (b) table salt (c) sugar (d) glucose powder
35. 35.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
36. 36.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to cool the water (d) to make it very salty
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) True (b) False
38. 38.True or false: melting ice is a change that cannot be undone. (a) True (b) False
39. 39.🧂 Which of these dissolves in water? (a) baking soda (b) cooking oil (c) chalk powder (d) sand
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) a battery cell (d) a spoon

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