Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 244 · 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 “the amount of water”? (a) we keep it the same (b) we measure it (c) we change it
2. 2.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting ice (c) melting butter (d) baking a cake
3. 3.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny cubes (c) tiny stars (d) tiny triangles
4. 4.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
5. 5.🔍 Which is the odd one out? (a) chalk powder (b) sand (c) table salt (d) cooking oil
6. 6.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
7. 7.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) browning lemon ink (c) melting butter (d) rusting iron
8. 8.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) saturated (c) empty (d) magnetic
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) days to see crystals (b) the amount of water (c) sunny or shady place (d) the amount of salt
10. 10.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
11. 11.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) a friend who is running (c) the youngest child (d) nobody needs to
12. 12.🧂 Which of these dissolves in water? (a) cooking oil (b) chalk powder (c) sugar (d) sawdust
13. 13.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
14. 14.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True
15. 15.🔍 Which is the odd one out? (a) glucose powder (b) table salt (c) sugar (d) sand
16. 16.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
17. 17.🧂 Which of these dissolves in water? (a) table salt (b) cooking oil (c) small pebbles (d) chalk powder
18. 18.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
19. 19.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) bigger crystals (d) smaller crystals
20. 20.True or false: salt is not needed for growing salt crystals. (a) True (b) False
21. 21.True or false: dissolving salt is a change that can be undone. (a) False (b) True
22. 22.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) yeast (c) salt (d) warm water
23. 23.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
24. 24.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) salt crystals form (c) sugar crystals form (d) it turns to oil
25. 25.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
26. 26.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
27. 27.🔍 Which is the odd one out? (a) baking soda (b) sugar (c) chalk powder (d) glucose powder
28. 28.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to cool the water (c) to make it very salty (d) to change its colour
29. 29.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
30. 30.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) cooking an egg (c) dissolving salt (d) folding paper
31. 31.True or false: melting butter is a change that cannot be undone. (a) False (b) True
32. 32.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) browning lemon ink (c) cooking an egg (d) melting ice
33. 33.True or false: freezing water is a change that cannot be undone. (a) True (b) False
34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) a piece of string (d) turmeric powder
35. 35.⚖️ 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 keep it the same (c) we measure it
36. 36.True or false: baking soda does not dissolve in water. (a) True (b) False
37. 37.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) crystals grow faster (c) it turns sweet (d) it fizzes
38. 38.🧂 Which of these does not dissolve in water? (a) table salt (b) cooking oil (c) sugar (d) baking soda
39. 39.🔍 Which is the odd one out? (a) sawdust (b) cooking oil (c) sugar (d) sand
40. 40.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) in a busy doorway (d) on the edge of a table

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