Students will explore the phenomenon of physical and chemical properties of substances. They identify the two substances in a mystery mixture by observing the characteristics of the interactions that occur when they mix pairs of known substances.
Crash Course: Organizing Properties
Chemical Change vs. Physical Change
Physical and Chemical Change video
Students will explore the phenomenon of how elements can be organized and predicted by their properties. They begin this endeavor by learning that elements are the basic substances from which all common matter is made.
Atomic Structure and Periodic Trend Just How Small is the Atom
Chem4Kids The History of Atomic Chemistry
Why star stuff matters Just How Small is an Atom
pHet: Build an Atom pHet: Isotopes and Atomic Mass
Students will investigate the phenomenon of gas behavior and properties. They develop a particulate model to explain the invisible interactions that account for observable behaviors of gas.
Gases in the Home pHet: Gases Intro Time Crystals
Students will observe the phenomena of expansion and contraction of solids, liquids, and gases, and explain them in terms of kinetic theory—the motion of particles.
pHet: States of Matter Can we Reach Absolute Zero?
Students will explore the phenomena of heating and cooling. They learn one way that energy moves and how to conceptualize energy transfer as changes of the kinetic energy of particles, resulting from particle collisions.
Chemical Reactions and Burning
Students will explore the phenomenon of insulation. They test insulating materials, apply the results to design, and build a thermos that reduces energy transfer.
Students will investigate the phenomenon of dissolving, and distinguish it from melting. They compare the solubility of two substances, calcium carbonate and sodium chloride, and determine how to separate the mixtures to recover the original parts.
Students will explore the phenomenon of phases of matter. They examine water as a solid, liquid, and gas, and investigate the conditions that induce substances to change from one phase to another.
New State of Matter: Time Crystals
Students will explore the phenomenon of chemical reactions. They use models and equations to represent those reactions.
pHet: Balancing Chemical Equations
Students will explore the phenomenon of chemical reactions that stop on their own. They investigate the factors that limit reactions.