Which of the following does not happen during a chemical change? a- new bonds are formed. b- the identities of the substances change. c- compounds are broken down. d- the total mass increases.

Identify the examples in which sam interacts only with natural resources

According to the cell theory, which describes cells? a. all organisms are composed of multiple cells. b. all cells have the same structure and function. c. cells are found in everything on earth. d. living organisms are not created spontaneously

Which is the correct formula for photosynthesis