12. The Greeks were known as the first astronomers.

A. true

B. false

It's true

Which of the following is a part of a rock formation that consists more or less of the same type of rock mineral A. bed B. fossil C. event D. stratum

How big is the base (area) of the Washington Monument in square feet? (Hint - make sure the 3D Buildings is selected in the Layers box, located in the lower left of the screen.

Organic food is the fastest-growing sector of US agriculture. true or false

Type the correct answer in the box. Use numerals instead of words. Lily runs a painting business. She has two experienced interior painters. One painter can paint a 300-square-foot room in 200 minutes.

Most of Russia's North European Plain has a humid continental climate. T or F

Most rivers have relatively gentle gradients in the headwaters and steep gradients in their downstream portions. True / False.

In which world region do hurricanes form? A. along the Equator B. near the poles C. only in the Atlantic Ocean D. only in the Pacific Ocean

What is the diameter of the geosphere

A major concern about increasing global temperatures is that a large portion of polar ice could detach and melt into the ocean.

Match the vocabulary word with its description. 1. produced from the sun biomass energy 2. produced by burning organic materials geothermal energy 3. produced from the heat inside the earth hydroelectric power 4.