Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 941 · 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.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt grows roots (c) salt eats water (d) the dish melts
2. 2.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) a magnet (d) a shallow dish
3. 3.True or false: salt is needed for growing salt crystals. (a) False (b) True
4. 4.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) it fizzes (c) crystals grow faster (d) few or no crystals
5. 5.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
6. 6.⚖️ 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 keep it the same (b) we measure it (c) we change it
7. 7.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
8. 8.True or false: rusting iron is a change that can be undone. (a) False (b) True
9. 9.True or false: cooking oil does not dissolve in water. (a) True (b) False
10. 10.🔍 Which is the odd one out? (a) baking soda (b) sawdust (c) sugar (d) table salt
11. 11.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) nobody needs to (d) a grown-up
12. 12.⚖️ 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 keep it the same (c) we measure it
13. 13.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
14. 14.⚖️ 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 kind of salt (b) the amount of water (c) sunny or shady place (d) days to see crystals
15. 15.⚖️ 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 measure it (c) we change it
16. 16.True or false: folding paper is a change that cannot be undone. (a) True (b) False
17. 17.🧂 Which of these does not dissolve in water? (a) table salt (b) food colour (c) cooking oil (d) sugar
18. 18.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) the same dish (c) days to see crystals
20. 20.🧂 Which of these dissolves in water? (a) small pebbles (b) food colour (c) sawdust (d) sand
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) True (b) False
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) salt (d) a battery cell
23. 23.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
24. 24.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) frozen (c) magnetic (d) saturated
25. 25.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
26. 26.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) no crystals (c) bigger crystals (d) smaller crystals
27. 27.True or false: salt is not needed for growing salt crystals. (a) True (b) False
28. 28.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
29. 29.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
30. 30.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) freezing water (c) rusting iron (d) folding paper
31. 31.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) a piece of string (d) a balloon
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) False (b) True
34. 34.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) folding paper (c) melting butter (d) browning lemon ink
35. 35.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
36. 36.🔍 Which is the odd one out? (a) chalk powder (b) sawdust (c) small pebbles (d) sugar
37. 37.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
38. 38.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) freezing water (c) melting butter (d) folding paper
39. 39.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) fish make it (c) sand is ground up (d) sea water evaporates
40. 40.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) yeast (c) a piece of string (d) a spoon

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