Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 658 · 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: milk turning to curd is a change that can be undone. (a) True (b) False
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) True (b) False
3. 3.⚖️ 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
4. 4.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) it fizzes (d) few or no crystals
5. 5.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
6. 6.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
7. 7.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) saturated (c) empty (d) frozen
8. 8.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) safe from small children (d) next to the baby
9. 9.🧈 Which of these is a change that can be undone? (a) rusting iron (b) melting ice (c) milk turning to curd (d) cooking an egg
10. 10.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) fish make it (c) sea water evaporates (d) sand is ground up
11. 11.True or false: sawdust does not dissolve in water. (a) False (b) True
12. 12.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) warm water (c) a piece of string (d) salt
13. 13.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a mirror (c) a balloon (d) a piece of string
14. 14.⚖️ 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
15. 15.🧂 Which of these does not dissolve in water? (a) glucose powder (b) baking soda (c) small pebbles (d) food colour
16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) a shallow dish (d) a balloon
17. 17.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) yeast (c) warm water (d) salt
18. 18.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a grown-up (d) a friend who is running
19. 19.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
20. 20.⚖️ 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 water
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True
22. 22.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a spoon (c) a battery cell (d) a magnet
23. 23.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a shallow dish (c) a balloon (d) warm water
24. 24.True or false: melting butter is a change that cannot be undone. (a) True (b) False
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 water”? (a) we keep it the same (b) we change it (c) we measure it
26. 26.🔍 Which is the odd one out? (a) sugar (b) cooking oil (c) sawdust (d) small pebbles
27. 27.⚖️ 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) True (b) False
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) False (b) True
29. 29.🧂 Which of these dissolves in water? (a) sawdust (b) sugar (c) sand (d) cooking oil
30. 30.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
31. 31.True or false: a piece of string is not needed for growing salt crystals. (a) False (b) True
32. 32.🧂 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
33. 33.🔍 Which is the odd one out? (a) baking soda (b) glucose powder (c) chalk powder (d) food colour
34. 34.⚖️ 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 water (b) the amount of salt (c) days to see crystals (d) the kind of salt
35. 35.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt grows roots (c) water evaporates (d) salt eats water
36. 36.⚖️ 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) False (b) True
37. 37.⚖️ 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 keep it the same (c) we change it
38. 38.🧂 Which of these dissolves in water? (a) sand (b) sawdust (c) chalk powder (d) baking soda
39. 39.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) melting butter (c) folding paper (d) dissolving salt
40. 40.🔮 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

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