Refer to the Mohs Scale of Hardness. Recall that: o is the softest
o is the hardest
o Topaz is softer than
o The two items on this chart that can be scratched by a fingernail are and
o Two materials that can be scratched by an iron nail are and
o Two minerals that cannot be scratched by glass are and
o What is the substance that can be scratched by an iron nail but not a penny?
Please answer with the right answers

What statements accurately describe atoms

Abicycle slows down when the rider applies the brakes. what type of energy transformation is involved in this example? a. kinetic energy into heat energy b. heat energy into potential energy c. potential energy into kinetic energy d. kinetic energy into mechanical energy

Match each vocabulary term to its definition. 1. electrons neutral subatomic particles found in the nucleus of the atom 2. neutron lowest energy position of an electron in an atom 3. photon the path of an electron around the nucleus of an atom 4. ground state negatively charged, subatomic particles 5. protons packet of energy of specific size 6. element substance with only one type of atom 7. orbital positively charged, subatomic particles found in the nucleus of the atom