1. Continental Air Mass
2. Maritime Air Mass
3. Tropical Air Mass
4. Polar Air Mass
These are the 4 types of air masses that affect the weather in the Continental U.S.
Texas and Alaska has the two of the largest petroleum reserves
Answer:
The answer is C)
Explanation:
The predators were unable to keep the population of the mussels down. The mussels took more area of the rock. Other species that needed space did not return to the tidal pool. Otters can also be keystone species as they eat urchins. By doing so, they prevent the sea urchins form eating all the kelp plants and removing the entire habitat for many other species. The Keystone Species theory shows that this impact of few predators, that made up a minor amount of the total species, could have such a high impact on the ecosystem.
Answer:
#3
Explanation:
Because of gravity. Gravity makes the rocks look like they are in place.
Geography is the study of the physical features of the earth and its atmosphere, and of human activity as it affects and is affected by these, including the distribution of populations and resources, land use, and industry
