Density Tower Experiment Worksheet
What you do (Heaviest for its size sinks): 1. Pour honey slowly into the glass to fill about a quarter. 2. Pour coloured water gently down the side of the glass. 3. Pour the cooking oil gently on top and watch the layers settle. 4. Gently drop in a cork and a coin, see where each stops, and wipe up oil spills.
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- 1.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? What do we do with “the same glass”? (a) we keep it the same (b) we change it (c) we measure it
- 2.🧺 Do we need honey for the density tower? (a) needed (b) not needed
- 3.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the order of the layers is what we measure. (a) True (b) False
- 4.True or false: a tall clear glass is not needed for the density tower. (a) False (b) True
- 5.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the same three liquids is kept the same. (a) False (b) True
- 6.🍯 Is an ice cube denser or less dense than water? (a) denser than water (b) less dense than water
- 7.True or false: a spoon is needed for the density tower. (a) False (b) True
- 8.🧺 Which of these is needed for the density tower? (a) a mirror (b) a magnet (c) honey (d) turmeric powder
- 9.🔍 Which is the odd one out? (a) honey (b) very salty water (c) a ping-pong ball (d) a coin
- 10.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) in the honey layer (b) under the honey (c) on top of the oil (d) in the water layer
- 11.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a tall clear glass (b) a mirror (c) a spoon (d) honey
- 12.🔍 What do you see after pouring honey, water and oil into one glass? (a) the glass gets hot (b) three separate layers (c) bubbles of gas (d) one mixed colour
- 13.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) water with food colour (b) cooking oil (c) a balloon (d) honey
- 14.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) in the water layer (b) in the oil layer (c) at the very bottom (d) on top of the oil
- 15.🧺 Which of these is needed for the density tower? (a) a balloon (b) a battery cell (c) yeast (d) cooking oil
- 16.🔍 Which is the odd one out? (a) very salty water (b) a coin (c) an ice cube (d) a glass marble
- 17.🧺 Do we need a balloon for the density tower? (a) needed (b) not needed
- 18.🧺 Which of these is not needed for the density tower? (a) a balloon (b) honey (c) a tall clear glass (d) a spoon
- 19.🍯 Which of these is less dense than water? (a) very salty water (b) a coin (c) cooking oil (d) a pebble
- 20.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a magnet (b) water with food colour (c) a tall clear glass (d) cooking oil
- 21.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is the one thing we change? (a) the same three liquids (b) how much of each liquid (c) the order of pouring (d) the same glass
- 22.🧺 Do we need water with food colour for the density tower? (a) needed (b) not needed
- 23.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the same glass is the one thing we change. (a) False (b) True
- 24.🍯 Which of these is less dense than water? (a) a pebble (b) honey (c) a cork (d) a glass marble
- 25.True or false: a coin is less dense than water. (a) True (b) False
- 26.🔍 Which is the odd one out? (a) air (b) cooking oil (c) a cork (d) very salty water
- 27.🍯 Which of these is denser than water? (a) a glass marble (b) a ping-pong ball (c) cooking oil (d) an ice cube
- 28.True or false: a mirror is not needed for the density tower. (a) True (b) False
- 29.🔍 Which is the odd one out? (a) honey (b) very salty water (c) a glass marble (d) cooking oil
- 30.True or false: a spoon is not needed for the density tower. (a) True (b) False
- 31.🧺 Do we need turmeric powder for the density tower? (a) not needed (b) needed
- 32.🛟 Why should we wipe up spilled oil at once? (a) oil makes it rain (b) oil turns into honey (c) oil attracts magnets (d) spilled oil is slippery
- 33.🫗 Why does cooking oil float on top of water? (a) oil is sticky (b) oil is heavier (c) oil is hot (d) oil is less dense
- 34.🔮 Predict: you shake oil and water hard in a closed bottle and wait. What happens? (a) they turn to honey (b) they become solid (c) they separate again (d) they mix for ever
- 35.🔍 Which is the odd one out? (a) a pebble (b) very salty water (c) a glass marble (d) air
- 36.🍯 Is a cork denser or less dense than water? (a) denser than water (b) less dense than water
- 37.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is kept the same? (a) the order of the layers (b) the order of pouring (c) the same three liquids
- 38.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? What do we do with “how much of each liquid”? (a) we change it (b) we measure it (c) we keep it the same
- 39.🧺 Which of these is not needed for the density tower? (a) water with food colour (b) a tall clear glass (c) a spoon (d) a magnet
- 40.🧺 Which of these is needed for the density tower? (a) turmeric powder (b) a balloon (c) water with food colour (d) a battery cell
Answer key
- we keep it the same
- needed
- True
- False
- True
- less dense than water
- True
- honey
- a ping-pong ball
- on top of the oil
- a mirror
- three separate layers
- a balloon
- at the very bottom
- cooking oil
- an ice cube
- not needed
- a balloon
- cooking oil
- a magnet
- the order of pouring
- needed
- False
- a cork
- False
- very salty water
- a glass marble
- True
- cooking oil
- False
- not needed
- spilled oil is slippery
- oil is less dense
- they separate again
- air
- less dense than water
- the same three liquids
- we keep it the same
- a magnet
- water with food colour
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