Alpine ecosystems are typically dominated by grass and low growing shrubs with an average temperature of 40 and 60 degrees F. Tundra ecosystems on the other hand are extremely harsh, cold and unforgiving environments with a typical temperature of around 37 degrees F.<span />
Answer:
around the 6th century or earlier
Explanation:
Answer:
Formal operational
Explanation:
Jean Piaget develop a theory of cognitive development, according to which, children and teenagers go through different stages in the process of cognitive development. Each stage is qualitatively different from each other and as they go through stages, their thinking go through changes, from thinking based on actions to thinking based on ideas.
The last stage of his theory is called the formal operational stage and it takes place between age of 12 and up. During this stage, adolescents start to think abstractly and reason about hypothetical problems, they are also able to formulate hypothesis and test them in order to find theories and solutions to different problems based on abstract thought.
In this example, Raj is 12 years old and uses statistical analysis and scientific principles to predict the course of weather in New York. We can see that <u>he is thinking in an abstract way and using abstract tools such as statistical analysis in order to create his theory. </u>Therefore, because of his age and the type of thinking he is having, he is most likely in the formal operational stage of development.
Answer:
Biostratigrasphy.
Explanation:
<em>Biostratigraphy </em>is the method that is used to provide an estimate of age for this layer and this species. Biostratigraphy is a branch of stratigraphy. It focuses on assigning relative ages to rocks to similar stratigraphic layers that may be located hundreds of kilometers away by using the fossils contained in the stratus.
