Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 896 · 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.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting ice (c) milk turning to curd (d) dissolving salt
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) False (b) True
3. 3.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
4. 4.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
5. 5.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
6. 6.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) no crystals (c) liquid crystals (d) smaller crystals
7. 7.🔍 Which is the odd one out? (a) chalk powder (b) glucose powder (c) baking soda (d) food colour
8. 8.🧂 Which of these dissolves in water? (a) glucose powder (b) cooking oil (c) small pebbles (d) chalk powder
9. 9.True or false: sugar does not dissolve in water. (a) False (b) True
10. 10.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
11. 11.🛟 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
12. 12.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) crystals grow faster (d) it turns sweet
13. 13.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) sugar crystals form (c) it turns to butter (d) it turns to oil
14. 14.⚖️ 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 change it (b) we measure it (c) we keep it the same
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) True (b) False
16. 16.⚖️ 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
17. 17.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting butter (c) cooking an egg (d) freezing water
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.🧈 Which of these is a change that can be undone? (a) folding paper (b) baking a cake (c) cooking an egg (d) rusting iron
20. 20.True or false: baking soda dissolves in water. (a) True (b) False
21. 21.🔍 Which is the odd one out? (a) sugar (b) baking soda (c) cooking oil (d) table salt
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) a magnet (d) a shallow dish
23. 23.True or false: cooking oil does not dissolve in water. (a) False (b) True
24. 24.🧂 Which of these dissolves in water? (a) food colour (b) small pebbles (c) cooking oil (d) sand
25. 25.True or false: glucose powder does not dissolve in water. (a) False (b) True
26. 26.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
27. 27.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sea water evaporates (c) fish make it (d) sand is ground up
28. 28.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a shallow dish (c) warm water (d) a battery cell
29. 29.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) saturated (c) frozen (d) magnetic
30. 30.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
31. 31.⚖️ 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) days to see crystals (c) the amount of water (d) sunny or shady place
32. 32.🧺 Which of these is not needed for growing salt crystals? (a) turmeric powder (b) a spoon (c) salt (d) a piece of string
33. 33.🔍 Which is the odd one out? (a) table salt (b) sugar (c) food colour (d) small pebbles
34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) a spoon (c) warm water (d) salt
35. 35.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
36. 36.True or false: food colour dissolves in water. (a) True (b) False
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) True (b) False
38. 38.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
39. 39.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a balloon (c) a piece of string (d) turmeric powder
40. 40.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) freezing water (c) milk turning to curd (d) baking a cake

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