Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 321 · 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.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) on the edge of a table (d) safe from small children
2. 2.🌊 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
3. 3.🔍 Which is the odd one out? (a) baking soda (b) small pebbles (c) glucose powder (d) table salt
4. 4.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
5. 5.⚖️ 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) days to see crystals (c) the amount of water
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 salt”? (a) we keep it the same (b) we measure it (c) we change it
7. 7.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
8. 8.⚖️ 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 keep it the same (c) we change it
9. 9.True or false: melting butter is a change that cannot be undone. (a) True (b) False
10. 10.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
11. 11.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a magnet (c) a spoon (d) a piece of string
12. 12.🧂 Which of these does not dissolve in water? (a) baking soda (b) sand (c) glucose powder (d) sugar
13. 13.🧺 Which of these is needed for growing salt crystals? (a) a spoon (b) a balloon (c) a magnet (d) a mirror
14. 14.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) it turns sweet (d) crystals grow faster
15. 15.True or false: sand does not dissolve in water. (a) False (b) True
16. 16.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) liquid crystals (c) smaller crystals (d) no crystals
17. 17.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
18. 18.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) turmeric powder (c) a battery cell (d) a balloon
19. 19.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny triangles (d) tiny cubes
20. 20.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
21. 21.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
22. 22.🧂 Which of these does not dissolve in water? (a) glucose powder (b) small pebbles (c) sugar (d) baking soda
23. 23.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) baking a cake (c) melting ice (d) dissolving salt
24. 24.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
25. 25.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
26. 26.🧂 Which of these dissolves in water? (a) chalk powder (b) baking soda (c) sand (d) cooking oil
27. 27.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
28. 28.True or false: cooking oil does not dissolve in water. (a) False (b) True
29. 29.True or false: a battery cell is needed for growing salt crystals. (a) False (b) True
30. 30.⚖️ 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
31. 31.⚖️ 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
32. 32.🧺 Which of these is not needed for growing salt crystals? (a) a mirror (b) salt (c) warm water (d) a shallow dish
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) warm water (c) a shallow dish (d) salt
34. 34.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
35. 35.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) sugar crystals form (d) it turns to oil
36. 36.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) baking a cake (c) rusting iron (d) folding paper
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is what we measure. (a) True (b) False
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the same dish (b) days to see crystals (c) the amount of salt (d) the kind of salt
39. 39.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
40. 40.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) salt (c) a spoon (d) yeast

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