1. What are the different forms of energy displayed in the Gizmo? 2. Less than 20% of the energy we use comes from renewable sources (such as nuclear power). If renewable energy does not run out, why is it not used anymore?

When coal has reached it hardest, darkest form, it is called select one: 0 a. sub-bituminous b. lignite c. bituminous d. antrhacite next page

Which of the following is an eon in the time scale? phanerozoic proterozoic archean all of the above

The embryos of a bird, a reptile, and a mammal are similar in appearance. how does comparing the physical appearance of embryos of different species support the theory of evolution? a. it shows that these organisms share a common ancestor. b. it provides evidence that these organisms eat the same foods. c. it shows that these organisms share the same habitat. d. it provides evidence that these organisms suffered a genetic mutation.