Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 406 · 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: dissolving salt is a change that can be undone. (a) False (b) True
2. 2.⚖️ 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 same dish (b) days to see crystals (c) sunny or shady place (d) the kind of salt
3. 3.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) sugar crystals form (c) salt crystals form (d) it turns to butter
4. 4.🔍 Which is the odd one out? (a) sawdust (b) food colour (c) cooking oil (d) small pebbles
5. 5.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
6. 6.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
7. 7.⚖️ 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 change it (c) we measure it
8. 8.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
9. 9.🔍 Which is the odd one out? (a) glucose powder (b) sand (c) sawdust (d) chalk powder
10. 10.🧂 Which of these does not dissolve in water? (a) small pebbles (b) food colour (c) sugar (d) baking soda
11. 11.🔮 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
12. 12.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
13. 13.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) no crystals (c) liquid crystals (d) smaller crystals
14. 14.⚖️ 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 same dish (b) days to see crystals (c) sunny or shady place
15. 15.True or false: table salt dissolves in water. (a) False (b) True
16. 16.🧈 Which of these is a change that can be undone? (a) rusting iron (b) browning lemon ink (c) cooking an egg (d) folding paper
17. 17.⚖️ 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
18. 18.True or false: sugar dissolves in water. (a) False (b) True
19. 19.🧂 Does small pebbles 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? What do we do with “the kind of salt”? (a) we measure it (b) we keep it the same (c) we change it
21. 21.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
22. 22.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) nobody needs to (d) a grown-up
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) yeast (d) warm water
24. 24.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) freezing water (c) melting ice (d) folding paper
25. 25.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
26. 26.True or false: a piece of string is not needed for growing salt crystals. (a) False (b) True
27. 27.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
28. 28.🧂 Which of these dissolves in water? (a) food colour (b) small pebbles (c) sawdust (d) cooking oil
29. 29.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) fish make it (c) sea water evaporates (d) salt rains down
30. 30.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) yeast (c) a piece of string (d) warm water
31. 31.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) next to the baby (d) safe from small children
32. 32.🧈 Which of these is a change that can be undone? (a) melting ice (b) cooking an egg (c) milk turning to curd (d) rusting iron
33. 33.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
34. 34.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
35. 35.⚖️ 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 change it (b) we measure it (c) we keep it the same
36. 36.True or false: salt is needed for growing salt crystals. (a) True (b) False
37. 37.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
38. 38.True or false: baking soda dissolves in water. (a) True (b) False
39. 39.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
40. 40.🧂 Which of these dissolves in water? (a) sugar (b) small pebbles (c) sawdust (d) chalk powder

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