7. Similar rock formations have been discovered in Brazil and South Africa. These rock formations
were formed at the same time and are made of the same types of rocks. What could explain how
these rocks got so far apart?
Brazil and South Africa are parts of different plates. The plates were sometimes pushed far
apart by earthquakes, and soft, solid rock from underneath got added to the edges of the
plates.
Brazil and South Africa are parts of different plates. The plates floated away from each
other across the ocean.
Brazil and South Africa are parts of different plates. The plates slowly moved apart as new
plates from underneath got added between them over millions of years.
Brazil and South Africa are parts of different plates. The plates slowly moved far apart as
soft, solid rock from underneath got added to the edges of the plates over millions of years.

How do forces between particles in gases compare to forces in the other states of matter? o a. the forces in gases are stronger than forces in solids but weaker than forces in liquids. o b. the forces in gases are weaker than forces in solids but stronger than forces in liquids. o c. the forces in gases are weaker than forces in solids and liquids. o d. the forces in gases are stronger than forces in solids and liquids. submit

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

The reactions of photosynthesis occur in the of plant cell? a. mitochondria. b. lysosomes. c. chloroplasts. d. chlorophyll