Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 951 · 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: a piece of string is needed for growing salt crystals. (a) False (b) True
2. 2.⚖️ 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 measure it (c) we change it
3. 3.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
4. 4.True or false: sugar does not dissolve in water. (a) False (b) True
5. 5.🧺 Which of these is not needed for growing salt crystals? (a) a battery cell (b) a piece of string (c) a shallow dish (d) salt
6. 6.🔍 Which is the odd one out? (a) cooking oil (b) glucose powder (c) food colour (d) baking soda
7. 7.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny stars (c) tiny cubes (d) tiny spheres
8. 8.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) dissolving salt (c) melting ice (d) cooking an egg
9. 9.⚖️ 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 kind of salt (b) the amount of water (c) sunny or shady place (d) the amount of salt
10. 10.🔍 Which is the odd one out? (a) baking soda (b) sugar (c) small pebbles (d) table salt
11. 11.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) few or no crystals (d) it fizzes
12. 12.True or false: rusting iron is a change that can be undone. (a) True (b) False
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) a battery cell (d) a shallow dish
14. 14.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) in a busy doorway (d) safe from small children
15. 15.🔍 Which is the odd one out? (a) chalk powder (b) cooking oil (c) baking soda (d) sand
16. 16.⚖️ 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 kind of salt (b) the amount of water (c) sunny or shady place (d) days to see crystals
17. 17.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
18. 18.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) yeast (d) a piece of string
19. 19.True or false: folding paper is a change that cannot be undone. (a) True (b) False
20. 20.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
21. 21.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
22. 22.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
23. 23.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) it turns to butter (c) salt crystals form (d) sugar crystals form
24. 24.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
25. 25.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
26. 26.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) dissolving salt (c) baking a cake (d) folding paper
27. 27.🧂 Which of these does not dissolve in water? (a) baking soda (b) food colour (c) table salt (d) sand
28. 28.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) True (b) False
30. 30.🧂 Which of these does not dissolve in water? (a) sawdust (b) table salt (c) baking soda (d) food colour
31. 31.⚖️ 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) False (b) True
32. 32.🧂 Which of these dissolves in water? (a) glucose powder (b) sand (c) cooking oil (d) sawdust
33. 33.True or false: sand does not dissolve in water. (a) False (b) True
34. 34.True or false: dissolving salt is a change that can be undone. (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 amount of salt”? (a) we keep it the same (b) we measure it (c) we change it
36. 36.🧂 Which of these dissolves in water? (a) baking soda (b) small pebbles (c) cooking oil (d) chalk powder
37. 37.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
38. 38.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a spoon (c) yeast (d) a mirror
39. 39.⚖️ 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 kind of salt (b) days to see crystals (c) sunny or shady place
40. 40.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) smaller crystals (c) no crystals (d) liquid crystals

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