Salt Crystal Experiment Worksheet

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

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids