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I think the vegetable oil made the vinegar float upwards.
It looks weird sadly

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The rubber band has lesser density than 1.0g, so it will float on the water

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The eraser will sink to the bottom because its denser than the water and its density is more than 1g/cm3

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Because saltwater contains more salt than freshwater, it is denser. Due to its larger density than the water, the egg will sink in fresh water. The egg will float in the salt water because the density of the water increases when salt is added, making it heavier than the egg. This causes the egg to float.

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The water is denser then the toothpick which is why the toothpick is floating on the water instead of sinking.

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Sample Post (Write your name as the title of the post)

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Sample Post (Write your name as the title of the post)

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Explanation here:

(When writing your explanation, use terms such as denser, less dense, float or sink to explain your observations)