the hardness of a unknown mineral can be found by

A) subjecting it to a strength test

B) calculating its density

C) comparing it to the other known samples using a scratch test

D) grinding it on a streak plate

According to the mantle plume model for the origin of hot spots Choose one: hot spots occur along subducting plate boundaries. mantle plumes produce volcanoes that do not always coincide with a plate boundary.

Discriminate between the immediate and chronic effects of water pollution and explain why chronic pollution is a more serious long term threat.

Which events took place during the Copernican revolution, when most people started to believe in a heliocentric model of the solar system? Select three options. Aristotle developed his model of the solar system.

Somalia is located on the coast of africa east of ethiopia. What kind of geography does Somalia have?

Ciri ciri lokasi yang cocok untuk dijadikan kegiatan bertambang

How do the presidents veto powers reflect the check and balances system of the constitution

The slowly increasing distance between south america and africa is due to

Central America is a (n) that connects the continents of North and South America.

What are three critical questions that entrepreneurs need t ask

1. Discuss the processes as an example of global interaction. *The Columbian Exchange