Which statement is from Niels Bohr’s proposed model of the atom? A) All elements are composed of atoms that cannot be divided.
B) All atoms of the same element are exactly alike.
C) Electrons move around the atomic nucleus with specific amounts of energy.
D) Every compound is composed of atoms of different elements, combined in a specific ratio.

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