Answer:
The speed of a roller coaster increases as gravity pulls it downhill and is greatest at its lowest point. Viewed in terms of energy, the roller-coaster-Earth system's gravitational potential energy is converted to kinetic energy
1.) Na
2.) Cl ( at the second blank)
sodium metal+hydrochloric acid
It suggests that life changes over time by showing different animals at different stages in their life, also giving more than one example on how they can change during early development and throughout their lives
The answer would be B, an electron because the proton is positive, neutron is neutral, and the nucleus is the center of the atom.
