Historians trace the origins of a 24-hour day to

a) the Aztecs.

b) the ancient Egyptians.

c) the druids of Stonehenge.

d) the Babylonian astronomer, Meton.

e) the Mayans.

Which of the following is used as evidence that the universe began with the big bang? A. craters on the moon B. leftover energy in the universe from the event C. the force of gravity D. the existence of atoms

Which event occurred approximately 4.6 billion years ago?

Explain how hard rock mining works

Why do all the planets travel around the sun in the same direction

Describe how temperature and salinity affect the density of water.

1. What is the trading route between the Indian Ocean and the Mediterranean Sea? 2. What lies between the Arabian Peninsula and India? 3. What is west of Yemen? 4. What is east of the United Arab Emirates? 5.

What types of areas are created by sinking, dry air at 30 degrees north or south latitude?

The us congress passage of the Homestead act in 1862 can be considered a pull factor that caused people to migrate to the us

Name the river that forms a border between the states of washington and oregon

Match the city in column 1 to its description in column 2. A. Shenzhen B. Tianjin C. Nanjing D. Guangzhou Located near Beijing; has agriculture and manufacturing. Former capital of China with rich history and culture; large manufacturing center.