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

Which best explains how a heat pump can heat a room? cold air from the house is moved through pipes, where it absorbs thermal energy. warm air from outside is pushed into the house to replace the cold air. combustion warms the air when chemical energy is transferred to thermal energy. fuel is used to move a piston, which pushes warm air into the house.

Which of the following is a good strategy when it comes to desserts

In order to study genetic mutations, scientists must study genetic material. which statement describes the genetic material scientists are most likely studying? a) they study alleles that contain chromosomes, which are rna. b) they study alleles that contain genes, which are chromosomes. c) they study chromosomes that contain genes, which are dna segments.