Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 554 · 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) melting ice (b) dissolving salt (c) milk turning to curd (d) freezing water
2. 2.True or false: sugar dissolves in water. (a) True (b) False
3. 3.⚖️ 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 amount of salt (b) sunny or shady place (c) days to see crystals (d) the kind of salt
4. 4.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) next to the baby (d) in a busy doorway
5. 5.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a balloon (c) a shallow dish (d) a battery cell
6. 6.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
7. 7.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it turns sweet (c) it fizzes (d) crystals grow faster
8. 8.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to butter (c) it turns to oil (d) salt crystals form
9. 9.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) a friend who is running (d) nobody needs to
10. 10.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
11. 11.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt grows roots (c) salt eats water (d) water evaporates
12. 12.🔍 Which is the odd one out? (a) chalk powder (b) sand (c) small pebbles (d) food colour
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) a shallow dish (d) yeast
14. 14.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) the kind of salt (c) days to see crystals
15. 15.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
16. 16.⚖️ 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
17. 17.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a piece of string (c) a magnet (d) warm water
18. 18.🔍 Which is the odd one out? (a) sand (b) sugar (c) small pebbles (d) cooking oil
19. 19.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) frozen (c) empty (d) magnetic
20. 20.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
21. 21.🧂 Which of these does not dissolve in water? (a) sugar (b) table salt (c) sand (d) glucose powder
22. 22.⚖️ 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) False (b) True
23. 23.⚖️ 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 measure it (b) we keep it the same (c) we change it
24. 24.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
25. 25.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sea water evaporates (c) sand is ground up (d) fish make it
26. 26.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a shallow dish (c) salt (d) a balloon
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) salt (c) a shallow dish (d) warm water
28. 28.True or false: baking soda dissolves in water. (a) True (b) False
29. 29.🧈 Which of these is a change that can be undone? (a) melting butter (b) baking a cake (c) browning lemon ink (d) rusting iron
30. 30.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
31. 31.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) turmeric powder (c) a battery cell (d) a piece of string
32. 32.🧂 Which of these dissolves in water? (a) food colour (b) sand (c) chalk powder (d) small pebbles
33. 33.⚖️ 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 measure it (b) we change it (c) we keep it the same
34. 34.🧂 Which of these does not dissolve in water? (a) sugar (b) food colour (c) cooking oil (d) glucose powder
35. 35.True or false: glucose powder dissolves in water. (a) False (b) True
36. 36.⚖️ 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
37. 37.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) bigger crystals (d) no crystals
38. 38.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
39. 39.True or false: melting butter is a change that can be undone. (a) False (b) True
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a shallow dish (d) a magnet

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