Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 365 · 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.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) bigger crystals (d) no crystals
2. 2.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
3. 3.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting butter (c) freezing water (d) baking a cake
4. 4.🧺 Which of these is not needed for growing salt crystals? (a) a balloon (b) salt (c) a piece of string (d) a spoon
5. 5.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a shallow dish (c) a balloon (d) turmeric powder
6. 6.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) sugar crystals form (d) it turns to oil
7. 7.🔍 Which is the odd one out? (a) sand (b) chalk powder (c) sugar (d) sawdust
8. 8.🧺 Do we need a balloon 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 the one thing we change. (a) False (b) True
10. 10.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny cubes (c) tiny triangles (d) tiny stars
11. 11.True or false: baking soda does not dissolve in water. (a) False (b) True
12. 12.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
13. 13.🔍 Which is the odd one out? (a) sugar (b) food colour (c) glucose powder (d) chalk powder
14. 14.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it turns sweet (c) crystals grow faster (d) it fizzes
15. 15.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) salt rains down (c) sea water evaporates (d) fish make it
16. 16.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
17. 17.⚖️ 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
18. 18.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
19. 19.⚖️ 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
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 keep it the same (b) we measure it (c) we change it
21. 21.🧂 Which of these dissolves in water? (a) small pebbles (b) cooking oil (c) food colour (d) chalk powder
22. 22.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) False (b) True
23. 23.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a balloon (c) warm water (d) a piece of string
25. 25.⚖️ 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) days to see crystals (c) sunny or shady place
26. 26.🧂 Which of these does not dissolve in water? (a) cooking oil (b) sugar (c) table salt (d) baking soda
27. 27.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) saturated (c) empty (d) frozen
28. 28.⚖️ 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 salt (c) days to see crystals (d) the same dish
29. 29.🧂 Which of these dissolves in water? (a) sand (b) glucose powder (c) sawdust (d) cooking oil
30. 30.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) next to the baby (c) in a busy doorway (d) on the edge of a table
31. 31.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) a piece of string (d) a battery cell
33. 33.⚖️ 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 salt
34. 34.True or false: baking soda dissolves in water. (a) False (b) True
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a shallow dish (c) salt (d) a piece of string
36. 36.🧂 Which of these dissolves in water? (a) sawdust (b) sand (c) table salt (d) small pebbles
37. 37.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) freezing water (c) baking a cake (d) cooking an egg
38. 38.🧂 Which of these does not dissolve in water? (a) sand (b) glucose powder (c) sugar (d) baking soda
39. 39.True or false: dissolving salt is a change that can be undone. (a) True (b) False
40. 40.True or false: warm water is not needed for growing salt crystals. (a) True (b) False

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