The most abundant element in Earth's continental crust, by weight, is

silicon

iron

oxygen

calcium

What has happened in the last 50 years that would make the carbon dioxide levels change? Question options: a) continents have moved and altered the air b) decreased levels of ozone are found in the upper atmosphere c) the changes in Earth's orbit

Which of the following best explains the difference between climate and weather? A. Weather refers to long term atmospheric conditions; climate refers to short term. B. Climate refers to long term atmospheric conditions; weather refers to short term.

Which of the following represent human systems? Hoover Dam genetic engineering volcanic eruptions the Panama Canal plate tectonics

Identify the correct country and capital city highlighted on the map above. A. the United Kingdom - London B. Sweden - Stockholm C. France - Paris D. Italy - Rome

Predict the time needed to deliver 72 papers at a rate of 9 papers in 18 minutes

The winds shift from southwest to northwest as heavy rains and hail begin to fall in albany, new york. these changes are most likely caused by the arrival of a-) a warm front b-) an mT air mass c-) a cold front d-) a cT air mass

Which of the following statements is true, based on the data in the chart above? 1. Niger has twice as many births as deaths per 1,000 people, but the life expectancy is only 52.6, resulting in a young median age. 3.

Which of the following groups conquered North Africa

How do u put sprawling in a sentence

What two languages stand as language families all their own? Korean Chinese Filipino Japanese