Dissolving Experiment Worksheet: Warm and Cold Water
What you do (Warm, stir, small): 1. An adult pours the same amount of warm water and cold water into two glasses. 2. Add one level teaspoon of sugar to each at the same time. 3. Stir each the same number of times and time how long the sugar takes to vanish. 4. Look, do not taste — then compare the two times.
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- 1.🥄 Which of these dissolves in water? (a) sawdust (b) baking soda (c) sand (d) chalk powder
- 2.🧺 Which of these is needed for the dissolving test? (a) a magnet (b) a comb (c) sugar (d) a mirror
- 3.True or false: sand does not dissolve in water. (a) True (b) False
- 4.🧺 Do we need cold water for the dissolving test? (a) needed (b) not needed
- 5.True or false: table salt does not dissolve in water. (a) True (b) False
- 6.🔍 Which is the odd one out? (a) sugar (b) table salt (c) sand (d) glucose powder
- 7.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the amount of water is the one thing we change. (a) False (b) True
- 8.🥄 Which of these dissolves faster? (a) sugar left unstirred (b) powdered sugar (c) a big sugar cube (d) sugar in icy water
- 9.🧺 Do we need cotton wool for the dissolving test? (a) needed (b) not needed
- 10.🔍 Sand is stirred into water. What do you see after a while? (a) it floats up (b) it turns blue (c) it dissolves (d) it settles at the bottom
- 11.True or false: two clear glasses is needed for the dissolving test. (a) True (b) False
- 12.True or false: food colour does not dissolve in water. (a) True (b) False
- 13.🔍 Which is the odd one out? (a) glucose powder (b) table salt (c) food colour (d) small pebbles
- 14.🔮 Predict: you keep adding sugar to a small glass of water and stirring. What happens in the end? (a) the sugar turns to salt (b) some stays undissolved (c) the water turns solid (d) all of it dissolves
- 15.🧺 Do we need a clock or timer for the dissolving test? (a) not needed (b) needed
- 16.🥄 Which of these dissolves faster? (a) sugar in icy water (b) sugar left unstirred (c) sugar stirred well (d) a big sugar cube
- 17.🔍 Which is the odd one out? (a) table salt (b) cooking oil (c) food colour (d) sugar
- 18.🥄 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
- 19.🧺 Which of these is needed for the dissolving test? (a) honey (b) a balloon (c) a mirror (d) warm water
- 20.🧺 Do we need sugar for the dissolving test? (a) not needed (b) needed
- 21.True or false: sugar stirred well dissolves slower. (a) False (b) True
- 22.🥄 Which of these dissolves slower? (a) sugar stirred well (b) powdered sugar (c) sugar in warm water (d) a big sugar cube
- 23.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) both the same (b) powdered sugar (c) neither of them (d) the sugar cube
- 24.True or false: a balloon is needed for the dissolving test. (a) True (b) False
- 25.🥄 Does a big sugar cube dissolve faster or slower? (a) faster (b) slower
- 26.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “time to dissolve”? (a) we keep it the same (b) we change it (c) we measure it
- 27.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a teaspoon (b) warm water (c) a clock or timer (d) a comb
- 28.True or false: small pebbles dissolves in water. (a) False (b) True
- 29.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the water temperature”? (a) we measure it (b) we change it (c) we keep it the same
- 30.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the amount of sugar is the one thing we change. (a) True (b) False
- 31.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) cotton wool (b) warm water (c) cold water (d) two clear glasses
- 32.True or false: a magnet is not needed for the dissolving test. (a) False (b) True
- 33.🧺 Which of these is needed for the dissolving test? (a) honey (b) a balloon (c) a comb (d) two clear glasses
- 34.🔍 Which is the odd one out? (a) sugar (b) cooking oil (c) chalk powder (d) sawdust
- 35.🧺 Do we need honey for the dissolving test? (a) not needed (b) needed
- 36.🥄 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
- 37.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is kept the same? (a) the stirring (b) the water temperature (c) time to dissolve
- 38.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the amount of water”? (a) we measure it (b) we keep it the same (c) we change it
- 39.📘 What do we call water with sugar dissolved in it? (a) a crystal (b) a solution (c) a rainbow (d) a magnet
- 40.🧺 Do we need a mirror for the dissolving test? (a) not needed (b) needed
Answer key
- baking soda
- sugar
- True
- needed
- False
- sand
- False
- powdered sugar
- not needed
- it settles at the bottom
- True
- False
- small pebbles
- some stays undissolved
- needed
- sugar stirred well
- cooking oil
- does not dissolve
- warm water
- needed
- False
- a big sugar cube
- powdered sugar
- False
- slower
- we measure it
- a comb
- False
- we change it
- False
- cotton wool
- True
- two clear glasses
- sugar
- not needed
- does not dissolve
- the stirring
- we keep it the same
- a solution
- not needed
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