INVENTION CONVENTION IDEAS
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Air has mass. I know this because when you blow air into the balloon it gets heavier. When I weighed the ballon with no air it weighed 1.9 grams ballon with air weighed 2.5 grams. This proves that the more air you blow in means more mass. Due to this evidence, air has mass or weight most things in the universe are matter has mass which is why air has mass.
The young salmon is the only omnivore on the river food web. The young salmon eats algae, which is a plant, as well as sculpin, which is an animal. Omnivores eat both plants and animals, which the young salmon eats both of, so therefore it is an omnivore.