Which type of air mass do these high pressure fronts collide to make so many tornadoes?

If scientists only detect p waves in a certain layer of earths interior what does that tell us?

Is a state government creates a new tax to fund schools a example of checks and balances

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