Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 966 · 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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) salt (d) a balloon
2. 2.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) browning lemon ink (c) rusting iron (d) freezing water
3. 3.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) cooking oil (d) table salt
4. 4.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) the dish melts (d) water evaporates
5. 5.🧺 Which of these is not needed for growing salt crystals? (a) a battery cell (b) warm water (c) a spoon (d) a shallow dish
6. 6.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
7. 7.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
8. 8.⚖️ 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 salt
9. 9.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) on the edge of a table (c) next to the baby (d) in a busy doorway
10. 10.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) dissolving salt (c) cooking an egg (d) melting ice
11. 11.🧂 Which of these dissolves in water? (a) sand (b) cooking oil (c) chalk powder (d) table salt
12. 12.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
13. 13.⚖️ 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 keep it the same (b) we measure it (c) we change it
14. 14.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) milk turning to curd (c) browning lemon ink (d) folding paper
15. 15.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) a grown-up (d) the youngest child
16. 16.True or false: melting butter is a change that can be undone. (a) False (b) True
17. 17.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a piece of string (c) a mirror (d) warm water
18. 18.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) baking a cake (c) dissolving salt (d) rusting iron
19. 19.True or false: table salt does not dissolve in water. (a) True (b) False
20. 20.⚖️ 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) sunny or shady place (c) the amount of salt (d) days to see crystals
21. 21.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) a battery cell (d) warm water
22. 22.🔍 Which is the odd one out? (a) sand (b) sawdust (c) small pebbles (d) glucose powder
23. 23.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a balloon (c) warm water (d) a shallow dish
24. 24.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
25. 25.True or false: small pebbles dissolves in water. (a) False (b) True
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) turmeric powder (d) a spoon
27. 27.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
28. 28.🧂 Which of these dissolves in water? (a) chalk powder (b) glucose powder (c) small pebbles (d) cooking oil
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a mirror (d) a spoon
30. 30.True or false: sawdust does not dissolve in water. (a) False (b) True
31. 31.🔍 Which is the odd one out? (a) sand (b) table salt (c) cooking oil (d) small pebbles
32. 32.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to change its colour (c) to make it fizz (d) to make it very salty
33. 33.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
34. 34.🧂 Which of these does not dissolve in water? (a) table salt (b) baking soda (c) glucose powder (d) cooking oil
35. 35.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we change it (b) we measure it (c) we keep it the same
36. 36.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
37. 37.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
38. 38.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to oil (c) it turns to butter (d) salt crystals form
39. 39.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
40. 40.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) frozen (c) saturated (d) empty

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