Explain why at least one of the atoms that you exhaled in your very first breath at birth will be in your next breath
What will be an ideal response?
The number of atoms you exhale with each breath is about the same as the number of liters of air in Earth's atmosphere. Assuming you're several years old, the atoms from your first breath are by now pretty well evenly distributed in the atmosphere. That means one of those atoms is in each liter of air, on average. But since your first breath was less than a liter, take two or three breaths to be sure!
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If it takes energy to break bonds and you gain energy in the formation of bonds, how can some reactions be exothermic, while others are endothermic?
A. Some products have more energy than others and they always require energy to be formed. B. It is the total amount of energy that matters. Sometimes some bonds are stronger than others and so you gain or lose energy when you form them. C. It is the total number of bonds that matters. Sometimes you create more bonds than you break and since all bonds have same amount of energy you gain or lose energy depending on the number of bonds. D. Some reactants have more energetic bonds than others and they will always release energy. E. none of the above
The coyotes typically forage on mice and squirrels. However, as members of the canine family, Canidae, they are known to be able to eat berries and parts of plants as well as small animals. Thus, they would be classified as
a. Herbivores b. Carnivores c. Omnivores d. Detritivores e. Producers
Which of the following are the two main substances used in cloud seeding?
A. silver iodide and lead iodide B. lead iodide and dry ice C. ice crystals and flood powder D. silver iodide and dry ice
You are in a boat and concerned about shallow water in a meandering river. Where should you aim your boat to find the deepest water?
a. on the outside of the curve, close to the cut bank b. midchannel c. along the inside of the curve