Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 537 · 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.⚖️ 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 change it (b) we measure it (c) we keep it the same
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place 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? What do we do with “the same dish”? (a) we measure it (b) we change it (c) we keep it the same
4. 4.🔍 Which is the odd one out? (a) sand (b) baking soda (c) small pebbles (d) sawdust
5. 5.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it fizzes (c) it turns sweet (d) crystals grow faster
6. 6.🧂 Which of these does not dissolve in water? (a) sugar (b) food colour (c) cooking oil (d) table salt
7. 7.🌊 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
8. 8.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
9. 9.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
10. 10.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we measure it (b) we change it (c) we keep it the same
12. 12.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting ice (c) melting butter (d) baking a cake
13. 13.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
14. 14.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
15. 15.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) folding paper (c) milk turning to curd (d) rusting iron
16. 16.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
17. 17.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) salt crystals form (c) it turns to oil (d) it turns to butter
18. 18.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) empty (c) magnetic (d) saturated
19. 19.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) bigger crystals (d) liquid crystals
20. 20.True or false: food colour dissolves in water. (a) True (b) False
21. 21.🧂 Which of these dissolves in water? (a) cooking oil (b) sand (c) small pebbles (d) table salt
22. 22.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) dissolving salt (c) rusting iron (d) cooking an egg
23. 23.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
24. 24.True or false: folding paper is a change that cannot be undone. (a) False (b) True
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) days to see crystals (b) the amount of water (c) sunny or shady place
26. 26.🧂 Which of these dissolves in water? (a) small pebbles (b) glucose powder (c) chalk powder (d) sawdust
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) salt (d) a balloon
28. 28.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
29. 29.🧈 Which of these is a change that can be undone? (a) rusting iron (b) browning lemon ink (c) freezing water (d) milk turning to curd
30. 30.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
31. 31.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
32. 32.True or false: cooking an egg is a change that can be undone. (a) False (b) True
33. 33.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
34. 34.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
35. 35.🔍 Which is the odd one out? (a) glucose powder (b) sand (c) chalk powder (d) cooking oil
36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a magnet (c) a piece of string (d) warm water
37. 37.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) a friend who is running (d) nobody needs to
38. 38.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) dissolving salt (c) browning lemon ink (d) melting butter
39. 39.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) freezing water (c) rusting iron (d) folding paper
40. 40.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) safe from small children (d) in a busy doorway

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