Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 229 · 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.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) True (b) False
2. 2.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) crystals grow faster (c) it turns sweet (d) it fizzes
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) salt (c) a spoon (d) a shallow dish
4. 4.True or false: food colour does not dissolve in water. (a) False (b) True
5. 5.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny spheres (c) tiny stars (d) tiny triangles
6. 6.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
7. 7.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
8. 8.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
9. 9.🔍 Which is the odd one out? (a) baking soda (b) cooking oil (c) sawdust (d) chalk powder
10. 10.🧂 Which of these dissolves in water? (a) cooking oil (b) sawdust (c) glucose powder (d) chalk powder
11. 11.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) a friend who is running (d) the youngest child
12. 12.True or false: melting butter is a change that cannot be undone. (a) True (b) False
13. 13.🧂 Which of these dissolves in water? (a) baking soda (b) cooking oil (c) sand (d) small pebbles
14. 14.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) next to the baby (c) on the edge of a table (d) in a busy doorway
15. 15.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) frozen (c) magnetic (d) empty
16. 16.True or false: sand does not dissolve in water. (a) False (b) True
17. 17.🧂 Which of these does not dissolve in water? (a) baking soda (b) small pebbles (c) sugar (d) table salt
18. 18.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) it turns to oil (c) sugar crystals form (d) salt crystals form
19. 19.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
20. 20.🧂 Which of these dissolves in water? (a) table salt (b) sawdust (c) cooking oil (d) small pebbles
21. 21.True or false: folding paper is a change that cannot be undone. (a) True (b) False
22. 22.⚖️ 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 keep it the same (b) we change it (c) we measure it
23. 23.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
24. 24.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
25. 25.🔍 Which is the odd one out? (a) food colour (b) small pebbles (c) sand (d) chalk powder
26. 26.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) melting butter (c) rusting iron (d) browning lemon ink
27. 27.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) bigger crystals (c) liquid crystals (d) no crystals
28. 28.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
29. 29.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a battery cell (c) a shallow dish (d) a mirror
30. 30.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) False (b) True
31. 31.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
32. 32.⚖️ 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 measure it (b) we keep it the same (c) we change it
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) the same dish (c) sunny or shady place
34. 34.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
35. 35.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) sea water evaporates (c) sand is ground up (d) salt rains down
36. 36.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it fizz (c) to change its colour (d) to make it very salty
37. 37.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) turmeric powder (c) salt (d) a battery cell
38. 38.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) salt (c) a magnet (d) a piece of string
39. 39.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) water evaporates (c) the dish melts (d) salt eats water
40. 40.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve

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