Which country has a negative population growth rate today?
russia
canada
the united states
nigeria

Which of the following is a way that advancements in technology improve humans' ability to measure air quality and protect human health?

What does it mean if a piece of wood is ripped? it has been water-damaged. it has been cut with the grain. it has been cut against the grain. it has been covered with laminate.

Ascientist is explaining how background cosmic radiation gives evidence of the big bang theory. she says that radiation has been detected everywhere equally as heat in the universe and is increasing. this has been shown to be residual radiation from the big bang. what error did the scientist make?