Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 147 · 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.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
2. 2.True or false: salt is needed for growing salt crystals. (a) True (b) False
3. 3.⚖️ 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
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a shallow dish (d) a balloon
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) warm water (d) a mirror
6. 6.⚖️ 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 change it (c) we keep it the same
7. 7.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) bigger crystals (c) no crystals (d) liquid crystals
8. 8.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) melting butter (c) baking a cake (d) rusting iron
9. 9.🔍 Which is the odd one out? (a) sugar (b) sand (c) table salt (d) baking soda
10. 10.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
11. 11.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) fish make it (c) sand is ground up (d) sea water evaporates
12. 12.True or false: food colour does not dissolve in water. (a) True (b) False
13. 13.True or false: table salt dissolves in water. (a) False (b) True
14. 14.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) in a busy doorway (c) next to the baby (d) on the edge of a table
15. 15.True or false: small pebbles dissolves in water. (a) False (b) True
16. 16.True or false: sugar does not dissolve in water. (a) True (b) False
17. 17.⚖️ 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
18. 18.🧈 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
19. 19.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) yeast (d) a piece of string
21. 21.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
22. 22.🔍 Which is the odd one out? (a) table salt (b) food colour (c) glucose powder (d) small pebbles
23. 23.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) it turns to butter (c) sugar crystals form (d) salt crystals form
24. 24.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
25. 25.True or false: chalk powder dissolves in water. (a) True (b) False
26. 26.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a shallow dish (c) a spoon (d) turmeric powder
27. 27.🧂 Which of these does not dissolve in water? (a) sugar (b) baking soda (c) sawdust (d) glucose powder
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) a battery cell (d) a shallow dish
29. 29.⚖️ 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
30. 30.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) folding paper (c) rusting iron (d) melting butter
31. 31.🧂 Which of these does not dissolve in water? (a) food colour (b) sugar (c) cooking oil (d) glucose powder
32. 32.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
33. 33.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) turmeric powder (c) a spoon (d) yeast
34. 34.🧂 Which of these does not dissolve in water? (a) sugar (b) baking soda (c) glucose powder (d) sand
35. 35.🧂 Which of these dissolves in water? (a) small pebbles (b) chalk powder (c) sawdust (d) baking soda
36. 36.🧂 Which of these dissolves in water? (a) sawdust (b) chalk powder (c) sand (d) sugar
37. 37.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
38. 38.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
39. 39.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
40. 40.🔮 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

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