Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 734 · 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.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
2. 2.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) in a busy doorway (d) safe from small children
3. 3.True or false: warm water is needed for growing salt crystals. (a) True (b) False
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.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
6. 6.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) saturated (c) magnetic (d) frozen
7. 7.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
8. 8.True or false: freezing water is a change that can be undone. (a) True (b) False
9. 9.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) it fizzes (d) few or no crystals
10. 10.⚖️ 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 same dish (b) the amount of salt (c) sunny or shady place (d) days to see crystals
11. 11.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) baking a cake (c) melting ice (d) dissolving salt
12. 12.True or false: food colour does not dissolve in water. (a) False (b) True
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) a piece of string (c) a shallow dish (d) warm water
14. 14.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) sugar crystals form (c) it turns to oil (d) it turns to butter
15. 15.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
16. 16.🧂 Which of these does not dissolve in water? (a) baking soda (b) sawdust (c) glucose powder (d) sugar
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 kept the same. (a) False (b) True
18. 18.🧂 Which of these dissolves in water? (a) sand (b) cooking oil (c) chalk powder (d) food colour
19. 19.True or false: a piece of string is needed for growing salt crystals. (a) False (b) True
20. 20.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
21. 21.⚖️ 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) the kind of salt (b) sunny or shady place (c) the amount of water (d) days to see crystals
22. 22.⚖️ 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 keep it the same (c) we change it
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) a spoon (d) a battery cell
24. 24.⚖️ 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
25. 25.True or false: food colour dissolves in water. (a) False (b) True
26. 26.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
27. 27.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
28. 28.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
29. 29.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
30. 30.🧈 Which of these is a change that can be undone? (a) baking a cake (b) folding paper (c) milk turning to curd (d) cooking an egg
31. 31.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
32. 32.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt grows roots (c) water evaporates (d) salt eats water
33. 33.⚖️ 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
34. 34.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) True (b) False
35. 35.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) smaller crystals (c) liquid crystals (d) no crystals
36. 36.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
37. 37.🧂 Which of these dissolves in water? (a) sawdust (b) sand (c) sugar (d) chalk powder
38. 38.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) salt rains down (c) fish make it (d) sand is ground up
39. 39.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
40. 40.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) melting ice (c) browning lemon ink (d) freezing water

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