Match these items. 1. negative charge
orbit
2. basic unit of matter
John Dalton
3. electron path atom
4. drew first picture of atom
electron
5. three-dimensional orbits
nucleus
6. developed atomic theory
Niels Bohr
7. positive charge
proton
8. the center of an atom
electron cloud

Dis the correct answer thats what i put and it was right 

It explains why rocks appear in layers

The rate that would change would be the  searching efficiency/attack rate. there are only two other rates in this model: the  growth rate of prey, and the  predator or consumer mortality rate.the  searching efficiency/attack rate is what indicates how effectively can a predator capture its prey whether in the searching process or actual capturing/attacking process.