Lily learned that fossil fuels contain a lot of energy. Why are fossil fuels considered nonrenewable resources? * fossil fuels are essential to civilization
fossil fuels cannot be replaced fast enough for future use
fossil fuels are easily renewed
fossil fuels ceased to be formed a long time ago

In iceland, the mid atlantic ridge runs through the center of the contry. what can you conclude about the apperence of iceland many thousands of years from now?

Recent research by marine biologists suggests that bottlenose dolphins have names for themselves. scientists played sounds they had identified as the names of particular dolphins, putting them through a synthesizer so that they did not sound like the voices of particular dolphins. the researchers found that dolphins would respond to the names of other dolphins that they were related to or associated with, but they ignored the names of strangers. this discovery suggests a much greater degree of self-awareness in aquatic mammals than was previously suspected. if this research holds up, what does it suggest about dolphins?

When lactate builds up in a runners muscles it causes a burning sensation what causes this to occur