Why does black powder not explode unless it is ignited in a confined area?

During which season is the sun lowest in the sky? (This is science.)

Which of the following is not a major ocean on Earth? a. Indian b. Pacific c. Atlantic d. Southern

What is the same and different about continental crust and ocean crust

which of the following could be a modern-day example of cultural diffusion into the region of Southwest Asia?

According to the information in Encyclopedia Britannica (2015) on fossil records, which of the following was the least severe of the five major extinctions of life on earth?

How high does the earth's atmosphere extend? A. 100 m B. 1,000 m C. 10 km D. 100km

How to grow plants in space?

Based on this map of oil imports, which nation imported the greatest number of oil barrels each day in the years before 2006? A. China B. Australia C. Canada D. the United States

How far will a P-wave travel in 9 min 20 sec?

The land in Mexico City is sinking. What is the primary cause of this problem? A. deforestation caused by cutting down trees B. too much water being taken from underground aquifers C. too many offices and towers being built in the city D.