Saltwater: The Reason An Ocean Is Salty
Ocean water is full of mineral salts which enter through the rivers, passing through rock and soil. Water has a property of evaporation whereas salt does not, so a lot of salt is left behind.
Oceans are saline throughout the world, but the Mediterranean Sea is saltier. Many oceans are less salty due to the regular mixing of fresh river water.
UV light comes from the sun and is transmitted in waves or particles at different wavelengths an frequencies.
It makes black-light posters glow, and is responsible for summer tans. But too much exposure to UV radiation damage living tissue.
The idea that food is safe to eat off the floor if you pick it up quickly is not accurate.
A study showed that in some cases, bacteria takes less than a second to transfer to food. The longer food was allowed to stay on a surface, the more bacteria was transferred to the food. The higher the moisture, the higher the risk of transfer.
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