Fossils of sea creatures have been found near the top of Mount Everest (8848m above the sea level). How do you think they could have got there?

What mass of carbon dioxide is produced from the complete combustion of 4.50×10−3 g of methane?

Which is an example of the practical pursuit of alchemy? a. forming perfect substances. b. transforming base metals. c. developing metalworking techniques. d. linking spiritual characteristics with material substances.

Reactions in cells take place at about a. 40°c b. 0° c. 100°c d. 60°c