Which of the following correctly describes a compound? A. The atoms are chemically bonded together, and they retain their individual physical and chemical properties.

B. The atoms are not chemically bonded, and there is no set ratio for how the atoms can combine together.

C. The atoms can only combine in fixed ratios, and they can only be separated by a chemical change.

D. The atoms do not retain their individual chemical properties, and they can be separated by physical means.

Which statement best explains the relationship between an area is geography and the temperature of its surface water

What relationship exists between an enzyme and a catalyst?

Air pressure is measured in pascals. for a professional american football game, the ball should be inflated to about 90,000 pascals. scientists studied the effects of air temperature on the pressure inside american footballs by taking these steps: 1. prepare 100 footballs. 2. measure each football's air pressure. 3. divide footballs into 10 groups. 4. place the groups in different lockers cooled to different air temperatures. 5. after 12 hours, remove the footballs from lockers. 6. measure each football's pressure again. 7. compare the new pressures to the starting pressures. what two terms best describe the variable "air pressure inside the football" in this experiment? independent, qualitative independent, quantitative dependent, qualitative dependent, quantitative