The shadow zone exists because?

O

A. seismic waves cannot travel through solid rock.

O

B. sunlight blocks out P waves in certain regions.

O

C. P waves refract as they travel through Earth.

D. the mantle and core are composed of the same material.

The following is an example of a land where ethnic conflicts have occurred: A Somalia B Eritrea C Ethiopia D All of the Above

The thickness of the troposphere varies from place to place and from day to day. what influences its thickness

which of the following factors was most important in controlling the distribution of copper mines in the u. s. versus iron mines in the great lakes region

Which Caribbean nation has the most oil

Which of the following statements about ecosystems are true?1. Predators play a role in balancing the earth's ecosystems. 2. A healthy ecosystem can support an unlimited number of life forms. 3. The parts of an ecosystem depend on each other. 4.

1. Today, all of the statements about the Korean Peninsula are true except A the countries share a common history and culture B the countries have hostile forces massed on their border C the countries remain at war after 60 years D the countries

Why is the mexican plateau considered the heartland of mexico?

The Mississippi Delta is an example of which of the following? a. zone of deposition b. zone of transportation c. zone of sediment production d. angle of repose

Which of the following has been a continuing problem in Nigerian government? A. lack of technology B. illiteracy C. lack of communication D. corruption

According to this map, which states have a population of over 25 million residents? Check all that apply.