Scientist have been able to determine the composition of earth's layers by: a) studying photographs taken from satellites. b) drilling down and bringing up samples to study. c) shooting x-rays into the planet. d) making inferences based on data from seismic waves.

Standing side by side ,you and a friend step off a bridge at different times and fall for 1.6s to the water below.your friend goes first,and you follow after he has dropped a distance of 2.0m.when your friend hits the water,is the seperation between the two of you 2.0m or more than 2.0m? verify your answer with a calculation.

How do you tell if someone actually cares about you? and just say they do?

Explain why you think this diagram shows what happened to the carbon in the biodome.