What is the several principal line of longitude

What is the result of the greenhouse effect? a. heat is deflected from the atmosphere. b. heat is released from the atmosphere. c. heat is kept in the atmosphere. d. plants are able to grow in the tropics where the air is the heaviest.

Aplane cuts a pyramid as shown in the diagram. what is the shape of the cross section? a. a hexagon b. a pentagon c. a square d. a triangle

Which statements describe characteristics of mdcs? higher standard of living increased agricultural focus more access to health care more access to transportation and communication more industry reduced educational opportunities shorter life expectancy