Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 562 · 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.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
2. 2.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
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 piece of string
4. 4.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
5. 5.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
6. 6.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) small pebbles (d) sugar
7. 7.⚖️ 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) sunny or shady place (b) the amount of salt (c) the amount of water (d) the same dish
8. 8.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
9. 9.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a balloon (c) a magnet (d) salt
10. 10.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) on the edge of a table (d) in a busy doorway
11. 11.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) saturated (c) magnetic (d) empty
12. 12.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
13. 13.True or false: freezing water is a change that cannot be undone. (a) True (b) False
14. 14.True or false: browning lemon ink is a change that cannot be undone. (a) True (b) False
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) True (b) False
16. 16.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) salt rains down (c) sea water evaporates (d) sand is ground up
17. 17.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) freezing water (c) baking a cake (d) cooking an egg
18. 18.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) False (b) True
19. 19.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) the youngest child (d) a friend who is running
20. 20.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) yeast (c) warm water (d) turmeric powder
21. 21.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) salt (c) a piece of string (d) a spoon
22. 22.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) cooking oil (d) food colour
23. 23.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
24. 24.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
25. 25.🧂 Which of these does not dissolve in water? (a) chalk powder (b) baking soda (c) sugar (d) table salt
26. 26.🔍 Which is the odd one out? (a) food colour (b) table salt (c) sugar (d) sand
27. 27.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) bigger crystals (d) no crystals
28. 28.True or false: cooking an egg is a change that can be undone. (a) False (b) True
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) turmeric powder (c) salt (d) a shallow dish
30. 30.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) crystals grow faster (c) it turns sweet (d) few or no crystals
31. 31.⚖️ 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
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a magnet (c) salt (d) warm water
33. 33.True or false: warm water is needed for growing salt crystals. (a) True (b) False
34. 34.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the same dish (b) sunny or shady place (c) days to see crystals
35. 35.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
36. 36.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) cooking an egg (c) folding paper (d) rusting iron
37. 37.🔍 Which is the odd one out? (a) sawdust (b) sand (c) cooking oil (d) glucose powder
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) True (b) False
39. 39.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
40. 40.🔍 Which is the odd one out? (a) food colour (b) sawdust (c) small pebbles (d) chalk powder

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