What spurred economic growth in the united states during the first half of the 1900s

a. world war 1 and world war 2

b the vietnam war

c high tech industries

d immigrant workers

Where is the great rift valley located? a. western africa b. northern africa c. southern africa d. eastern africathe great rift valley is located in d eastern africa?

2. What changes take place during physical weathering? a. Rocks are broken into smaller pieces. b. The mineralogy of previously existing rocks changes. c. Minerals crystallize as water evaporates. d. All of these changes take place.

Summarize, in brief, what causes seasonal change. What occurs on the equator and at the North and South Poles?

The asthenosphere and lithosphere are parts of Earth's A. geosphere. B. biosphere. C. hydrosphere. D. atmosphere. Reset Selection

Imagine pollution increasing in the atmosphere over thousands of years Predict how the surface of the earth might change

Trees in deciduous forest do what? A. Shed leaves during one season B. Grow in a warm Mediterranean climate C. Have needlelike leaves D. Grow in a climate that is cold year round

How many miles long is the great wall of china

What landforms are created at convergent boundaries?

In which direction does the Sun appear to move across the sky? Ofrom west to east from east to west from north to south from south to north

What is a planetary nebula neither a planet nor a nebula?