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

Volcanic ash deposits composed of mafic minerals sometimes develop a very distinctive reddish-orange color after weathering at the surface. This coloration results from the

What are some of the possible surface features along the San Andreas Fault?

How is ozone beneficial to life on earth?

What language spread as a result of the expansion of islam?

Harry Hess proposed that when two oceanic plates met each other, the denser plate would sink under the less dense plate. This is now known as this term. Question 1 options: a. Production b. Subduction c. Reduction d. Induction

11. Name 3 types of birds in Oceania and describe what makes them unique. 12. What are some ways that non-native species were introduced to Oceania? 13. What effects can invasive species can have on an ecosystem? 14.

Which of the following is a false pairing of an early civilization and its modern-day location A. Mesopotamians - Iraq B. Indus Valley Civilization - Pakistan C. Olmec - Canada D. Egyptians - Egypt

What is the main reason water from the ocean turns to what're vapor, and than evaporates into the air? A. ocean breezes B. changing tides C. heat front the sun D. moons gravitational pull

What could cause an igneous rock to become soil? a. Increased temperature and pressure c. Exposure and weathering b. Melting and crystallization d. All of the above

One knot is equal to one nautical mile. a. True b. False