Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 649 · 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.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
2. 2.🔍 Which is the odd one out? (a) sand (b) chalk powder (c) sawdust (d) table salt
3. 3.🧈 Which of these is a change that cannot be undone? (a) rusting iron (b) dissolving salt (c) freezing water (d) melting butter
4. 4.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) it turns to oil (c) salt crystals form (d) sugar crystals form
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) turmeric powder (d) a piece of string
6. 6.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
7. 7.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) nobody needs to (d) a grown-up
8. 8.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
9. 9.⚖️ 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
10. 10.True or false: sawdust dissolves in water. (a) False (b) True
11. 11.🧂 Which of these dissolves in water? (a) sand (b) sawdust (c) sugar (d) chalk powder
12. 12.🧂 Which of these does not dissolve in water? (a) food colour (b) table salt (c) sand (d) sugar
13. 13.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
14. 14.🔍 Which is the odd one out? (a) sugar (b) cooking oil (c) table salt (d) glucose powder
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the kind of salt (b) sunny or shady place (c) days to see crystals
16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) yeast (d) a piece of string
17. 17.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) True (b) False
18. 18.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
19. 19.🧂 Which of these dissolves in water? (a) cooking oil (b) glucose powder (c) small pebbles (d) sawdust
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we change it (b) we measure it (c) we keep it the same
21. 21.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
22. 22.True or false: sugar dissolves in water. (a) False (b) True
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a mirror (c) warm water (d) a piece of string
24. 24.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) True (b) False
25. 25.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) False (b) True
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the same dish (b) sunny or shady place (c) days to see crystals
27. 27.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it fizzes (c) it turns sweet (d) few or no crystals
28. 28.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) smaller crystals (c) liquid crystals (d) no crystals
29. 29.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
30. 30.🔍 Which is the odd one out? (a) small pebbles (b) baking soda (c) table salt (d) glucose powder
31. 31.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to make it very salty (c) to change its colour (d) to cool the water
32. 32.⚖️ 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 keep it the same (c) we measure it
33. 33.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) in a busy doorway (c) next to the baby (d) on the edge of a table
34. 34.🔍 Which is the odd one out? (a) table salt (b) sugar (c) chalk powder (d) baking soda
35. 35.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) milk turning to curd (c) rusting iron (d) folding paper
36. 36.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
37. 37.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
38. 38.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
39. 39.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
40. 40.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny triangles (c) tiny cubes (d) tiny stars

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