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? Which of these is the one thing we change? (a) how much of each liquid (b) the same glass (c) the order of pouring (d) the order of the layers
- 2.⚖️ 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 the one thing we change. (a) True (b) False
- 3.🧺 Which of these is not needed for the density tower? (a) a tall clear glass (b) honey (c) a battery cell (d) cooking oil
- 4.🧺 Which of these is needed for the density tower? (a) a battery cell (b) a balloon (c) cooking oil (d) a mirror
- 5.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) cooking oil (b) honey (c) a spoon (d) a mirror
- 6.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) turmeric powder (b) a spoon (c) water with food colour (d) a tall clear glass
- 7.🍯 Why does honey sink to the bottom of the glass? (a) it is the densest (b) it is the stickiest (c) it is yellow (d) it is the coldest
- 8.⚖️ 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
- 9.⚖️ 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
- 10.True or false: cooking oil is denser than water. (a) True (b) False
- 11.🍯 Is a glass marble denser or less dense than water? (a) less dense than water (b) denser than water
- 12.True or false: a tall clear glass is needed for the density tower. (a) False (b) True
- 13.🍯 Is an ice cube denser or less dense than water? (a) denser than water (b) less dense than water
- 14.⚖️ 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
- 15.🍯 Which of these is denser than water? (a) cooking oil (b) air (c) an ice cube (d) very salty water
- 16.True or false: yeast is needed for the density tower. (a) True (b) False
- 17.⚖️ 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
- 18.True or false: air is less dense than water. (a) True (b) False
- 19.True or false: honey is less dense than water. (a) False (b) True
- 20.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) cooking oil (b) a tall clear glass (c) a spoon (d) a magnet
- 21.⚖️ 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
- 22.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) yeast (b) cooking oil (c) a tall clear glass (d) honey
- 23.True or false: a magnet is not needed for the density tower. (a) False (b) True
- 24.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a battery cell (b) a spoon (c) water with food colour (d) cooking oil
- 25.🍯 Is a coin denser or less dense than water? (a) denser than water (b) less dense than water
- 26.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) under the honey (b) on top of the oil (c) in the honey layer (d) in the water layer
- 27.🔍 Which is the odd one out? (a) a glass marble (b) a ping-pong ball (c) very salty water (d) honey
- 28.🫗 Why does cooking oil float on top of water? (a) oil is hot (b) oil is heavier (c) oil is less dense (d) oil is sticky
- 29.🔍 Which is the odd one out? (a) air (b) honey (c) an ice cube (d) a ping-pong ball
- 30.True or false: a magnet is needed for the density tower. (a) False (b) True
- 31.🍯 Which of these is less dense than water? (a) very salty water (b) an ice cube (c) a glass marble (d) a pebble
- 32.🔍 Which is the odd one out? (a) a pebble (b) a coin (c) cooking oil (d) very salty water
- 33.🔍 Which is the odd one out? (a) air (b) an ice cube (c) cooking oil (d) a glass marble
- 34.True or false: a coin is denser than water. (a) True (b) False
- 35.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) in the water layer (b) on top of the oil (c) at the very bottom (d) in the oil layer
- 36.🔍 Which is the odd one out? (a) cooking oil (b) an ice cube (c) a ping-pong ball (d) a pebble
- 37.⚖️ 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 order of pouring”? (a) we keep it the same (b) we measure it (c) we change it
- 38.🛟 Why should we wipe up spilled oil at once? (a) oil attracts magnets (b) oil turns into honey (c) spilled oil is slippery (d) oil makes it rain
- 39.🔮 Predict: you shake oil and water hard in a closed bottle and wait. What happens? (a) they separate again (b) they become solid (c) they mix for ever (d) they turn to honey
- 40.📘 What does “dense” mean? (a) heavy for its size (b) very colourful (c) very hot (d) very thin
Answer key
- the order of pouring
- False
- a battery cell
- cooking oil
- a mirror
- turmeric powder
- it is the densest
- True
- we keep it the same
- False
- denser than water
- True
- less dense than water
- we keep it the same
- very salty water
- False
- False
- True
- False
- a magnet
- True
- yeast
- True
- a battery cell
- denser than water
- on top of the oil
- a ping-pong ball
- oil is less dense
- honey
- False
- an ice cube
- cooking oil
- a glass marble
- True
- at the very bottom
- a pebble
- we change it
- spilled oil is slippery
- they separate again
- heavy for its size
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