Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 515 · 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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a magnet (c) salt (d) a piece of string
2. 2.🔍 Which is the odd one out? (a) sugar (b) baking soda (c) chalk powder (d) table salt
3. 3.⚖️ 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 measure it (b) we change it (c) we keep it the same
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we keep it the same (b) we change it (c) we measure it
5. 5.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
6. 6.True or false: table salt does not dissolve in water. (a) True (b) False
7. 7.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny triangles (c) tiny spheres (d) tiny stars
8. 8.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) sea water evaporates (c) salt rains down (d) fish make it
9. 9.True or false: melting butter is a change that cannot be undone. (a) False (b) True
10. 10.🔍 Which is the odd one out? (a) glucose powder (b) table salt (c) food colour (d) sawdust
11. 11.⚖️ 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 same dish (b) sunny or shady place (c) the amount of salt (d) days to see crystals
12. 12.⚖️ 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
13. 13.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a piece of string (c) a balloon (d) turmeric powder
14. 14.⚖️ 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
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 what we measure. (a) True (b) False
16. 16.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) crystals grow faster (d) few or no crystals
17. 17.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) melting ice (c) rusting iron (d) cooking an egg
18. 18.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it fizz (c) to make it very salty (d) to cool the water
19. 19.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
20. 20.True or false: sugar dissolves in water. (a) False (b) True
21. 21.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
22. 22.⚖️ 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
23. 23.🔍 Which is the odd one out? (a) small pebbles (b) table salt (c) sugar (d) food colour
24. 24.🧈 Which of these is a change that can be undone? (a) melting butter (b) milk turning to curd (c) rusting iron (d) baking a cake
25. 25.🔍 Which is the odd one out? (a) sand (b) small pebbles (c) sugar (d) cooking oil
26. 26.🧂 Which of these dissolves in water? (a) chalk powder (b) sand (c) cooking oil (d) sugar
27. 27.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
28. 28.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
29. 29.True or false: food colour dissolves in water. (a) True (b) False
30. 30.🧂 Which of these does not dissolve in water? (a) glucose powder (b) food colour (c) baking soda (d) chalk powder
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) a battery cell (d) a shallow dish
32. 32.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
33. 33.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) the youngest child (d) a friend who is running
34. 34.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) bigger crystals (d) no crystals
35. 35.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
36. 36.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) sugar crystals form (c) it turns to oil (d) it turns to butter
37. 37.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
38. 38.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
39. 39.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
40. 40.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) in a busy doorway (c) on the edge of a table (d) next to the baby

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