What is required for a fossil to become petrified? ice
mold
bacteria
O decay
O ground water
minerals

Which statement is correct? the speed of the light ray is the same in air and medium a. the speed of the light ray is the same in air and medium b. medium a and medium b have different densities because light refracts at different angles. medium a and medium b have the same density because the light ray strikes both at the same angle.

Shari is trying to decide how she should use her cash birthday gifts. her choices are new clothes, a concert ticket, or donating the money to her favorite charity. shari decides to donate the money. the value given up by not choosing both the clothes and the concert ticket is called a . a.) trade-off b.) opportunity cost c.) retail price

The large ship carried british passengers across the ocean to america. whats the proper adjective in the sentence?