Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 656 · 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.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
2. 2.🔍 Which is the odd one out? (a) small pebbles (b) sand (c) glucose powder (d) chalk powder
3. 3.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a shallow dish (c) a mirror (d) warm water
4. 4.True or false: baking soda dissolves in water. (a) True (b) False
5. 5.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
6. 6.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) smaller crystals (c) liquid crystals (d) no crystals
7. 7.⚖️ 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 amount of water (b) sunny or shady place (c) days to see crystals (d) the same dish
8. 8.True or false: cooking oil dissolves in water. (a) False (b) True
9. 9.⚖️ 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 measure it (b) we keep it the same (c) we change it
10. 10.🧂 Which of these does not dissolve in water? (a) glucose powder (b) sugar (c) sawdust (d) table salt
11. 11.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to change its colour (c) to make it very salty (d) to make it fizz
12. 12.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
13. 13.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
14. 14.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) dissolving salt (c) rusting iron (d) melting ice
15. 15.⚖️ 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) True (b) False
16. 16.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
17. 17.True or false: baking a cake is a change that cannot be undone. (a) True (b) False
18. 18.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) safe from small children (d) next to the baby
19. 19.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
20. 20.🧂 Which of these does not dissolve in water? (a) cooking oil (b) sugar (c) baking soda (d) food colour
21. 21.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a battery cell (d) warm water
22. 22.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a shallow dish (c) a balloon (d) salt
23. 23.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
24. 24.🧈 Which of these is a change that can be undone? (a) rusting iron (b) melting butter (c) baking a cake (d) cooking an egg
25. 25.⚖️ 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
26. 26.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting butter (c) browning lemon ink (d) dissolving salt
27. 27.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
28. 28.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
29. 29.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) few or no crystals (c) it fizzes (d) crystals grow faster
30. 30.⚖️ 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
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) True (b) False
32. 32.True or false: baking soda does not dissolve in water. (a) True (b) False
33. 33.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a friend who is running (d) a grown-up
34. 34.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) salt crystals form (c) it turns to oil (d) it turns to butter
35. 35.🔍 Which is the odd one out? (a) sugar (b) sand (c) table salt (d) baking soda
36. 36.🔍 Which is the odd one out? (a) sawdust (b) baking soda (c) food colour (d) sugar
37. 37.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
38. 38.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a battery cell (c) salt (d) a mirror
39. 39.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny spheres (d) tiny cubes
40. 40.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed

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