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Conduct an investigation to determine whether the mixing of two or more substances results in new substances.
Apply scientific principles and evidence to provide an explanation about the effects of changing the temperature or concentration of the reacting particles on the rate at which a reaction occurs.
Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy.
Make observations and measurements to identify materials based on their properties.
Develop a model to describe that matter is made of particles too small to be seen.
Measure and graph quantities to provide evidence that regardless of the type of change that occurs when heating, cooling, or mixing substances, the total weight of matter is conserved.
This webmix shares links to help fourth grade science teachers prepare to teach the Disciplinary Core Ideas related to Energy in NGSS.
Construct an argument with evidence that some changes caused by heating or cooling can be reversed and some cannot.
Refine the design of a chemical system by specifying a change in conditions that would produce increased amounts of products at equilibrium.
Plan and conduct an investigation to gather evidence to compare the structure of substances at the bulk scale to infer the strength of electrical forces between particles.
Construct and revise an explanation for the outcome of a simple chemical reaction based on the outermost electron states of atoms, trends in the periodic table, and knowledge of the patterns...
2nd graders show understanding that some changes caused by heating and cooling are reversible and some are not. (NGSS)