What is the average speed of a bird that flies 1.55 km in 30 minutes

Nuclear fusion is the source of energy for stars. besides hydrogen, which other element is most likely also common in stars?

Identify and describe the three ways that mutations affect organisms.

Type the correct answer in the box. spell all words correctly.what is the correct term for living the most sustainable life you can within your current circumstances? when your are being as sustainable as you can within your current lifestyle, you are said to be sustainability.