Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 477 · 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: browning lemon ink is a change that can be undone. (a) False (b) True
2. 2.True or false: baking a cake is a change that cannot be undone. (a) True (b) False
3. 3.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) True (b) False
5. 5.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) a piece of string (c) warm water (d) a spoon
6. 6.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
7. 7.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it fizz (c) to change its colour (d) to make it very salty
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.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
10. 10.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) melting butter (c) melting ice (d) folding paper
11. 11.⚖️ 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 measure it (b) we change it (c) we keep it the same
12. 12.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
13. 13.🔍 Which is the odd one out? (a) food colour (b) sugar (c) table salt (d) sand
14. 14.⚖️ 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
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the amount of salt (b) the kind of salt (c) days to see crystals (d) the amount of water
16. 16.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) cooking an egg (c) freezing water (d) folding paper
17. 17.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
18. 18.True or false: browning lemon ink is a change that cannot be undone. (a) True (b) False
19. 19.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
20. 20.True or false: table salt does not dissolve in water. (a) True (b) False
21. 21.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
22. 22.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
23. 23.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) water evaporates (c) the dish melts (d) salt grows roots
24. 24.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) bigger crystals (c) liquid crystals (d) smaller crystals
25. 25.True or false: small pebbles dissolves in water. (a) True (b) False
26. 26.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) salt crystals form (c) sugar crystals form (d) it turns to butter
27. 27.True or false: freezing water is a change that cannot be undone. (a) True (b) False
28. 28.True or false: salt is needed for growing salt crystals. (a) False (b) True
29. 29.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
30. 30.True or false: folding paper is a change that cannot be undone. (a) False (b) True
31. 31.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) folding paper (c) melting ice (d) rusting iron
32. 32.🧺 Which of these is not needed for growing salt crystals? (a) a mirror (b) a piece of string (c) a spoon (d) a shallow dish
33. 33.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) frozen (c) magnetic (d) saturated
34. 34.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
35. 35.True or false: baking soda dissolves in water. (a) False (b) True
36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a mirror (c) warm water (d) a shallow dish
37. 37.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
38. 38.⚖️ 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
39. 39.🧂 Which of these does not dissolve in water? (a) table salt (b) baking soda (c) food colour (d) chalk powder
40. 40.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False

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