A radioactive isotope of element X (which is the parent isotope) is discovered in different amounts in four rocks. Which rock is oldest?
- 15% of element X remains in Rock A
- 28% of element X remains in Rock A
- 57% of element X remains in Rock A
- 75% of element X remains in Rock A
15% of element X remains in Rock A
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Different species within a community, whether native or nonnative, play similar roles in the community's ecology.
Answer the following statement true (T) or false (F)
List and describe the cloud classes and their associated cloud types, along with a discussion of the type of weather associated with each
What will be an ideal response?
What was the primary reason Europeans were proponents of the slave trade?
A) Africans were thought of as little more than chattel. B) Enslaved people compensated for the labor shortages in the New World brought on by annihilation of Native Americans. C) Slavery was an outgrowth of the Industrial Revolution, and workers were needed for factories. D) European traders sailing to the Americas needed any possible cargo they could find, and slavery was the most profitable solution. E) Cities in the New World needed to be populated, and too few Europeans were voluntarily leaving for the colonies.
Desert pavement is caused by eolian abrasion that polishes rock surfaces
Indicate whether the statement is true or false