Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 978 · 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? What do we do with “days to see crystals”? (a) we keep it the same (b) we change it (c) we measure it
2. 2.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a grown-up (d) a friend who is running
3. 3.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
4. 4.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to change its colour (c) to make it very salty (d) to make it fizz
5. 5.True or false: folding paper is a change that cannot be undone. (a) True (b) False
6. 6.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
7. 7.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) smaller crystals (c) no crystals (d) liquid crystals
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) warm water (d) turmeric powder
9. 9.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) empty (c) magnetic (d) saturated
10. 10.True or false: salt is needed for growing salt crystals. (a) False (b) True
11. 11.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) cooking an egg (c) rusting iron (d) folding paper
12. 12.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it fizzes (c) few or no crystals (d) it turns sweet
13. 13.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
14. 14.🛟 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
15. 15.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) warm water (d) a magnet
17. 17.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
18. 18.⚖️ 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) days to see crystals (c) the amount of water (d) sunny or shady place
19. 19.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
20. 20.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) salt crystals form (c) it turns to oil (d) it turns to butter
21. 21.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
22. 22.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
23. 23.⚖️ 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) False (b) True
24. 24.🔍 Which is the odd one out? (a) sawdust (b) food colour (c) baking soda (d) glucose powder
25. 25.🔍 Which is the odd one out? (a) table salt (b) food colour (c) baking soda (d) chalk powder
26. 26.⚖️ 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 change it (b) we keep it the same (c) we measure it
27. 27.🧂 Which of these dissolves in water? (a) small pebbles (b) sand (c) cooking oil (d) food colour
28. 28.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
29. 29.⚖️ 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
30. 30.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a balloon (c) a shallow dish (d) a battery cell
31. 31.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) folding paper (c) melting butter (d) melting ice
32. 32.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
33. 33.True or false: baking a cake is a change that can be undone. (a) True (b) False
34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) warm water (c) salt (d) a shallow dish
35. 35.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
36. 36.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
37. 37.True or false: baking soda dissolves in water. (a) True (b) False
38. 38.True or false: sugar dissolves in water. (a) False (b) True
39. 39.True or false: freezing water is a change that cannot be undone. (a) True (b) False
40. 40.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve

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