Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 948 · 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: freezing water is a change that cannot be undone. (a) False (b) True
2. 2.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) folding paper (c) browning lemon ink (d) freezing water
3. 3.🧂 Which of these dissolves in water? (a) small pebbles (b) sawdust (c) chalk powder (d) sugar
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) a shallow dish (d) a balloon
5. 5.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
6. 6.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
7. 7.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
8. 8.🔍 Which is the odd one out? (a) food colour (b) table salt (c) baking soda (d) cooking oil
9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) a mirror (d) warm water
10. 10.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) True (b) False
11. 11.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) milk turning to curd (d) freezing water
12. 12.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) next to the baby (d) safe from small children
13. 13.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) salt crystals form (c) it turns to oil (d) it turns to butter
14. 14.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
15. 15.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
16. 16.⚖️ 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 keep it the same (c) we change it
17. 17.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
18. 18.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
19. 19.🧈 Which of these is a change that can be undone? (a) rusting iron (b) baking a cake (c) melting ice (d) browning lemon ink
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) False (b) True
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) the amount of water (c) the same dish (d) days to see crystals
22. 22.🔍 Which is the odd one out? (a) small pebbles (b) table salt (c) glucose powder (d) food colour
23. 23.⚖️ 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 measure it (b) we change it (c) we keep it the same
24. 24.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) a grown-up (c) nobody needs to (d) the youngest child
25. 25.⚖️ 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 keep it the same (b) we measure it (c) we change it
26. 26.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
27. 27.True or false: baking soda dissolves in water. (a) False (b) True
28. 28.⚖️ 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 change it (c) we measure it
29. 29.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) no crystals (c) smaller crystals (d) bigger crystals
30. 30.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it very salty (c) to make it fizz (d) to change its colour
31. 31.🔍 Which is the odd one out? (a) baking soda (b) chalk powder (c) table salt (d) sugar
32. 32.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a balloon (c) a spoon (d) a mirror
33. 33.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
34. 34.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a battery cell (c) salt (d) yeast
35. 35.⚖️ 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) False (b) True
36. 36.⚖️ 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 change it (b) we measure it (c) we keep it the same
37. 37.True or false: small pebbles dissolves in water. (a) False (b) True
38. 38.True or false: food colour does not dissolve in water. (a) False (b) True
39. 39.🔍 Which is the odd one out? (a) glucose powder (b) sawdust (c) cooking oil (d) sand
40. 40.🧺 Which of these is not needed for growing salt crystals? (a) a battery cell (b) a shallow dish (c) a spoon (d) salt

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