Connecticut Grade 9 Content Standards
D1 - Describe the effects of adding energy to matter in terms of the motion of atoms and molecules, and the resulting phase changes.
D2 - Explain how energy is transferred by conduction, convection and radiation.
D10 - Describe the general structure of the atom, and explain how the properties of the first 20 elements in the Periodic Table are related to their atomic structures.
D11 - Describe how atoms combine to form new substances by transferring electrons (ionic bonding) or sharing electrons (covalent bonding).
D20 - Explain how solar energy causes water to cycle through the major earth reservoirs.