Although electricity is needed, the creation and transmission of electrical energy can affect the environment. Which source of electricity negatively impacts our environment the most?
A)
wind
8)
water
static
D
fossil fuels

In which situations is the principle of cross-cutting relationship useful in determining relative age?

In the diagram below, the northern hemisphere would be in what season at position a a.fall b. winter c.summer d.spring

What evidence supports the law of conservation of energy? a) mechanical energy is converted to chemical energy during photosynthesis. b) oxygen is made from the breakdown of carbon dioxide during photosynthesis. c)energy is absorbed by chlorophyll and becomes chemical energy during photosynthesis. d)the sun gives off light energy that is absorbed by plants.