What is the texture of igneous rocks that cool very rapidly?

Amountain created from tectonic activity would be considered which type of landform ? a) primary landform b) secondary landform

According ti the following map, what are the most common mineral resources found in the united states?

Which ecosystem best fits the characteristics listed below? which ecosystem best fits the characteristics listed below? ii. seasonal migrations of millions of wildebeests, zebras, and elephants iii. large numbers of predators, such as lions iv. acacia trees and grasses a. the congo rainforest b. the african mangroves c. the serengeti grasslands d. the sahel