A group of students used classroom materials to build a model of cellular structures. Which statement describes the best way materials were used to model mitochondria? A: a beaker with water, to model how the cell gets its shape
B: a battery with wires, to model energy for cellular processes
C: a cloth bag, to model how the cell let’s materials into and out of it
D: a computer mouse, to model how the cell controls cellular processes

Achemical reaction (also known as a chemical change) produces substances that are chemically different from the starting materials. an example of a chemical reaction is the formation of water from hydrogen and oxygen gas.in a physical change, a substance changes its physical appearance but not its chemical identity. an example of physical change is the formation of liquid water from solid water, a familiar process called melting. physically, liquid water looks very different from solid water (ice) but the chemical identity, water, is the same for both. which of following changes that affect the composition of our atmosphere involve physical changes and which involve chemical reactions? oxygen gas changes to ozone during thunderstorms carbon dioxide is produced by the combustion of gasoline in an automobile engine. when coal, oil, and natural gas are decomposed in landsills they produce methane gas. freezing rain develops when a warm air mass overrides a cold air mass. fog forms from water vapor when the temperature drops below the dew point

Why is nh3 classified as a polar molecule

Select the word from the list that best fits the definition the nuclear family into which a person is born or adopted.