Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 285 · 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.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) True (b) False
2. 2.⚖️ 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 keep it the same (b) we change it (c) we measure it
3. 3.🧂 Which of these does not dissolve in water? (a) sugar (b) glucose powder (c) chalk powder (d) food colour
4. 4.True or false: sawdust dissolves in water. (a) True (b) False
5. 5.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) frozen (c) saturated (d) magnetic
6. 6.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) freezing water (c) melting ice (d) baking a cake
7. 7.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
8. 8.🧂 Which of these does not dissolve in water? (a) sawdust (b) food colour (c) table salt (d) sugar
9. 9.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to cool the water (c) to make it very salty (d) to change its colour
10. 10.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
11. 11.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) salt (c) yeast (d) a shallow dish
12. 12.⚖️ 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 measure it (b) we change it (c) we keep it the same
13. 13.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
14. 14.🔍 Which is the odd one out? (a) sugar (b) small pebbles (c) food colour (d) baking soda
15. 15.🔍 Which is the odd one out? (a) chalk powder (b) glucose powder (c) sand (d) small pebbles
16. 16.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) salt crystals form (c) it turns to oil (d) sugar crystals form
17. 17.⚖️ 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 measure it (b) we change it (c) we keep it the same
18. 18.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) safe from small children (d) next to the baby
19. 19.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) smaller crystals (d) bigger crystals
20. 20.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
21. 21.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
22. 22.🧂 Which of these dissolves in water? (a) sugar (b) sand (c) cooking oil (d) small pebbles
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) salt (d) a magnet
24. 24.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) False (b) True
25. 25.⚖️ 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 measure it (b) we change it (c) we keep it the same
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) False (b) True
27. 27.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
28. 28.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
29. 29.⚖️ 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 same dish (c) the amount of salt (d) days to see crystals
30. 30.🧈 Which of these is a change that can be undone? (a) baking a cake (b) rusting iron (c) milk turning to curd (d) folding paper
31. 31.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
32. 32.True or false: small pebbles dissolves in water. (a) False (b) True
33. 33.True or false: freezing water is a change that cannot be undone. (a) True (b) False
34. 34.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
35. 35.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
36. 36.🛟 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
37. 37.🧂 Which of these does not dissolve in water? (a) baking soda (b) sand (c) glucose powder (d) food colour
38. 38.⚖️ 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) the amount of salt (c) sunny or shady place
39. 39.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
40. 40.True or false: glucose powder dissolves in water. (a) True (b) False

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