About how long ago do scientists think Earth's last pole reversal occurred?
700,000 years
700 million years
O 7,000 years
7 million years

Which best explains why england had the highest standard of living in the world in 1990? a. england started industrializing before the rest of the world b. england had the highest population in the world. c. england hadthe most fertile soil in the world. dengland had more natural resources.

Gemstones are commonly found in pegmatites, which are igneous rocks that are a. exceptionally mafic b. exceptionally coarse grained c. exceptionally fine grained d. extrusive, forming from lava

What's erosion? a. the breakdown of rock into smaller pieces b. the removal of weathered products from rock c. a change in rock resulting from exposure to water d. a chemical change in rock that weakens it