Which of the following are types of energy transformation? Check all that are true.
a book resting on a shelf
O two magnets that are stuck together
- a person rubbing their hands together to warm them
Opicking up a water balloon and throwing it

Importance of a screensaver in a computer

Seed plants that lived during the carboniferous impact life on earth today because a. they are the ancestors of all plant life on earth. b. their remains formed coal, which is an important resource. c. they produced fossils that are used to date many geologic events. d. their presence caused oxygen levels to drop, allowing animals to evolve.

Name one type of data that h-r diagrams do not show.