Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 846 · 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.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny cubes (c) tiny stars (d) tiny spheres
2. 2.🔍 Which is the odd one out? (a) small pebbles (b) sand (c) table salt (d) sawdust
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) yeast (c) a piece of string (d) a shallow dish
4. 4.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) yeast (c) a magnet (d) a shallow dish
5. 5.🔍 Which is the odd one out? (a) cooking oil (b) chalk powder (c) small pebbles (d) glucose powder
6. 6.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) cooking an egg (c) melting butter (d) folding paper
7. 7.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
8. 8.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
9. 9.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) the dish melts (c) water evaporates (d) salt eats water
10. 10.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) browning lemon ink (c) dissolving salt (d) melting ice
11. 11.⚖️ 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 keep it the same (c) we change it
12. 12.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
13. 13.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) next to the baby (d) safe from small children
14. 14.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) a spoon (d) a balloon
16. 16.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
17. 17.True or false: sugar does not dissolve in water. (a) True (b) False
18. 18.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
19. 19.True or false: sand dissolves in water. (a) False (b) True
20. 20.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) salt crystals form (c) sugar crystals form (d) it turns to butter
21. 21.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) turmeric powder (d) salt
22. 22.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) turmeric powder (c) a balloon (d) a spoon
23. 23.True or false: sugar dissolves in water. (a) False (b) True
24. 24.⚖️ 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) the amount of water (c) the amount of salt (d) sunny or shady place
25. 25.⚖️ 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
26. 26.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) glucose powder (d) small pebbles
27. 27.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) True (b) False
28. 28.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
29. 29.True or false: yeast is needed for growing salt crystals. (a) True (b) False
30. 30.⚖️ 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 change it (b) we measure it (c) we keep it the same
31. 31.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a mirror (c) a magnet (d) a piece of string
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a battery cell (c) a spoon (d) salt
33. 33.🌊 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
34. 34.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
35. 35.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) bigger crystals (d) smaller crystals
36. 36.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to make it very salty (c) to cool the water (d) to change its colour
37. 37.True or false: table salt does not dissolve in water. (a) False (b) True
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a spoon (c) salt (d) a shallow dish
39. 39.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) a piece of string (c) a spoon (d) a shallow dish
40. 40.True or false: melting ice is a change that can be undone. (a) False (b) True

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