Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 63 · 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 table salt dissolve in water? (a) dissolves in water (b) does not dissolve
2. 2.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) cooking an egg (c) browning lemon ink (d) freezing water
3. 3.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
4. 4.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) crystals grow faster (c) it fizzes (d) it turns sweet
5. 5.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) nobody needs to (d) a friend who is running
6. 6.🧂 Which of these does not dissolve in water? (a) sugar (b) sand (c) baking soda (d) glucose powder
7. 7.🧂 Which of these does not dissolve in water? (a) glucose powder (b) chalk powder (c) sugar (d) food colour
8. 8.🧈 Which of these is a change that can be undone? (a) rusting iron (b) melting ice (c) baking a cake (d) browning lemon ink
9. 9.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) salt (c) a shallow dish (d) warm water
10. 10.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
11. 11.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
12. 12.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
13. 13.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
14. 14.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) a magnet (d) a shallow dish
16. 16.⚖️ 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
17. 17.⚖️ 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 change it (b) we measure it (c) we keep it the same
18. 18.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
19. 19.🔍 Which is the odd one out? (a) sand (b) glucose powder (c) table salt (d) sugar
20. 20.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) bigger crystals (d) no crystals
21. 21.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sand is ground up (c) sea water evaporates (d) fish make it
22. 22.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it fizz (c) to make it very salty (d) to change its colour
23. 23.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) salt (c) turmeric powder (d) a shallow dish
24. 24.🧂 Which of these dissolves in water? (a) cooking oil (b) sand (c) chalk powder (d) sugar
25. 25.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) frozen (c) saturated (d) magnetic
26. 26.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) glucose powder (d) chalk powder
27. 27.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) the same dish (c) days to see crystals
28. 28.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) milk turning to curd (c) folding paper (d) melting ice
29. 29.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) in a busy doorway (c) on the edge of a table (d) next to the baby
30. 30.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
31. 31.True or false: small pebbles dissolves in water. (a) True (b) False
32. 32.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) chalk powder (d) sugar
33. 33.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) freezing water (c) melting butter (d) folding paper
34. 34.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
35. 35.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
36. 36.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to butter (c) it turns to oil (d) salt crystals form
37. 37.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) a piece of string (c) salt (d) a shallow dish
39. 39.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
40. 40.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed

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