2. which statement is true for a chemical change? a. of the substance is not changing. b. mass is conserved c. the substances always changes from solid to liquid.

Drag the correct tiles to the image. not all tiles will be used. the diagram is a schematic representation of the electron transport mechanism in mitochondria. label the diagram to complete the model.

(drag each tile to the correct location.) categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both. - a tentative statement used to guide scientific investigations. - makes predictions about future events. - can be tested by many independent researchers. - based on observations of natural phenomena. - a well-established, highly reliable explanation.

Melting glaciers is a serious threat to the environment what is the possible consequence of melting glaciers on polar bears?