Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 205 · 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.True or false: a battery cell is needed for growing salt crystals. (a) False (b) True
2. 2.True or false: baking soda dissolves in water. (a) False (b) True
3. 3.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt eats water (c) water evaporates (d) salt grows roots
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) a battery cell (d) a piece of string
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a mirror (c) a piece of string (d) a shallow dish
6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) False (b) True
7. 7.🧂 Which of these dissolves in water? (a) cooking oil (b) sawdust (c) chalk powder (d) table salt
8. 8.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) the youngest child (d) a friend who is running
9. 9.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
10. 10.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we measure it (b) we change it (c) we keep it the same
12. 12.⚖️ 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
13. 13.True or false: freezing water is a change that can be undone. (a) False (b) True
14. 14.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) liquid crystals (d) bigger crystals
15. 15.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
16. 16.⚖️ 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) the kind of salt (c) sunny or shady place (d) the same dish
17. 17.🧂 Which of these does not dissolve in water? (a) baking soda (b) table salt (c) small pebbles (d) food colour
18. 18.True or false: table salt does not dissolve in water. (a) False (b) True
19. 19.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting ice (c) folding paper (d) cooking an egg
20. 20.True or false: chalk powder dissolves in water. (a) True (b) False
21. 21.⚖️ 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) sunny or shady place (b) the amount of water (c) the same dish (d) the kind of salt
22. 22.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
23. 23.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
24. 24.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
25. 25.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) empty (c) frozen (d) saturated
26. 26.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) warm water (c) a battery cell (d) a shallow dish
27. 27.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) yeast (c) warm water (d) a balloon
28. 28.🧂 Which of these does not dissolve in water? (a) table salt (b) glucose powder (c) cooking oil (d) food colour
29. 29.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
30. 30.🧂 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
31. 31.True or false: melting butter is a change that can be undone. (a) False (b) True
32. 32.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
33. 33.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
34. 34.⚖️ 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
35. 35.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) on the edge of a table (c) in a busy doorway (d) next to the baby
36. 36.🔍 Which is the odd one out? (a) small pebbles (b) table salt (c) sawdust (d) sand
37. 37.True or false: chalk powder does not dissolve in water. (a) True (b) False
38. 38.True or false: sugar does not dissolve in water. (a) False (b) True
39. 39.True or false: sawdust does not dissolve in water. (a) False (b) True
40. 40.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we keep it the same (b) we change it (c) we measure it

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