Why are food webs better representations of how energy moves through an ecosystem than food chains? 1. Food chains show how matter moves through an ecosystem, not energy.

2. Food webs show that animals in an ecosystem can get energy by eating different things.

3. Food chains include decomposers, which do not play a role in energy movement through an ecosystem.

4. Food webs include how energy enters an ecosystem, and food chains don't.

Select the correct text in the passage. which sentences describe examples of sustainable living? i live in an old apartment building downtown, but my company is based in an office park on the outskirts of the city. i drive an old car that needs to be replaced. i plan to buy a hybrid for better gas mileage, but for now i am able to carpool with a couple of friends from work. the drive to the office park is about 45 minutes each way, but we do get to work in a modern building. the architects just received a leed certification for the design.

Joe shines white light into a bowl half full of water at an angle of incident of 27.5°. calculate the angle of refraction in the water given the indices of refraction for air and water are 1.00 and 1.36, respectively.

What is the mass of 0.46 mil of mgcl2