No system is completely closed off from its surroundings. Which example represents a system that is almost completely closed?

a campfire

a sealed, insulated cooler

a bowl of soup

a filled bathtub

answer: the correct answer is   air pressure at the top of mount everest is higher than at the bottom of the grand canyon.

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explanation:

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.