Coastal plain, southern region,amazon lowlands,central highlands
Answer:Examples of valuable nonmetallic minerals extracted by mining are sand, gravel, phosphate
Explanation:
Nonmetallic minerals refers to those chemical elements that cannot be used to make any other products after they have been melted. Examples of these minerals are clay, limestone,marble , sand and gravel. They are called non metallic because they can not conduct electricity , can not conduct thermal power, they lack luster,rigor and malleability.
The non metallic metals are mostly used to make cements , lime and glass.
They can also be used in sanitary ,tableware and decorative products.
Several steps are followed in making certain products from these minerals such as grinding,cutting,mixing,shaping and heating.
Answer:
B. Many different countries participate
Explanation:
used context clues,,,
in 776 BC "different Greek city-states would all participate" and now "different countries participate in games"
Answer:
naturalistic observation
Explanation:
As can be seen in the question above, Jane spent decades observing the behavior of the chimpanzees in their habitats and did not interfere with anything, letting them behave naturally, as they do among themselves without human intervention. This type of research is known as naturalistic observation, which consists of observing the behavior and reactions of individuals in their natural habitats.
Because of overpopulation and a need for transport with an increasing energy demand
