Scientists use the amount of radioactive isotopes found in rock and fossils to calculate their ages. this process is called what

Anna lives in a city that experiences high precipitation, with an average annual rainfall of 524 millimeters. it is warm all year. it is hottest during july, with an average temperature of 98°f, and coldest during december, with an average temperature of 80°f. tim lives in a city with an average rainfall of 30 millimeters per year. it has hot summers and cool winters. it is hottest during july, with an average temperature of 70°f, and coldest during january, with an average temperature of 28°f.anna’s city is in a  continental  dry  moderate  tropical    climate, while tim’s city is in a  continental  dry  moderate  polar    climate.

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

What is one early technological advance that shaped culture? a the use of fire b the discovery of arable land c family units. d migration