Earth Science Physical Science Objectives After lab activities, homework, and reading assignments in this unit, each student should be able to: 1. Measure the mass and volume of objects and liquids using correct metric units. 2. Calculate the density of objects and liquids. 3. Explain how density controls the level at which objects and fluids float. 4. Explain the relationship between temperature and molecular motion. 5. Explain how compression and decompression affect the temperature of a substance. 6. Name and describe the parts of an atom. 7. Use Periodic Table of Elements to determine the number of protons, neutrons, and electrons for any atom of any element. 8. Tell the differences between mixtures, compounds, and elements. 9. Explain the meaning of the following terms*: mass gram liter millifluid evaporation boiling proton electron ion Atomic number density compression water displacement volume meter kiloAtomic Mass condensation melting neutron molecule centimatter viscosity atom * Remember you can make flashcards for the above vocabulary terms to submit for extra credit on your test day.