Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 43 · 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.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) saturated (c) frozen (d) empty
2. 2.⚖️ 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
3. 3.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) False (b) True
5. 5.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
6. 6.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to make it fizz (c) to cool the water (d) to change its colour
7. 7.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
8. 8.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) False (b) True
9. 9.🧂 Which of these does not dissolve in water? (a) food colour (b) baking soda (c) sugar (d) chalk powder
10. 10.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) warm water (d) a balloon
11. 11.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
12. 12.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a magnet (c) a spoon (d) a mirror
13. 13.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a friend who is running (d) a grown-up
14. 14.True or false: sugar does not dissolve in water. (a) True (b) False
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) True (b) False
16. 16.True or false: freezing water is a change that cannot be undone. (a) False (b) True
17. 17.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a mirror (c) warm water (d) a spoon
18. 18.⚖️ 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 keep it the same (c) we measure it
19. 19.🧂 Which of these dissolves in water? (a) chalk powder (b) cooking oil (c) table salt (d) small pebbles
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) a shallow dish (d) a magnet
21. 21.🧂 Which of these does not dissolve in water? (a) sand (b) glucose powder (c) table salt (d) food colour
22. 22.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) bigger crystals (d) no crystals
23. 23.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
24. 24.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
25. 25.True or false: yeast is needed for growing salt crystals. (a) True (b) False
26. 26.🔍 Which is the odd one out? (a) baking soda (b) cooking oil (c) table salt (d) sugar
27. 27.⚖️ 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 change it (b) we measure it (c) we keep it the same
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) days to see crystals (c) the same dish (d) the amount of salt
29. 29.True or false: baking a cake is a change that can be undone. (a) False (b) True
30. 30.⚖️ 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
31. 31.True or false: sugar dissolves in water. (a) False (b) True
32. 32.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) it turns to oil (c) sugar crystals form (d) salt crystals form
33. 33.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sea water evaporates (c) fish make it (d) sand is ground up
34. 34.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
35. 35.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
36. 36.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) warm water (c) a battery cell (d) a piece of string
37. 37.True or false: food colour dissolves in water. (a) True (b) False
38. 38.🧂 Which of these dissolves in water? (a) sawdust (b) food colour (c) sand (d) small pebbles
39. 39.🔍 Which is the odd one out? (a) small pebbles (b) glucose powder (c) table salt (d) baking soda
40. 40.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) freezing water (c) cooking an egg (d) folding paper

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