SC15.8.4

Science (2015) Grade(s): 8

Planning and Carrying out Investigations

Systems and System Models

Students know:

Changes in particle motion of a pure substance occur when thermal energy is added to or removed from a system.
Changes in temperature of a pure substance occur when thermal energy is added to or removed from a system.
Changes in state of a pure substance occur when thermal energy is added to or removed from a system.

Students are able to:

Identify the phenomena under investigation, which includes changes in particle motion, temperature, and state of a pure substance when thermal energy is added to or removed from a system.
Identify the purpose of the investigation, which includes determining changes in particle motion, temperature, and state of a pure substance when thermal energy is added to or removed from a system.
Develop a plan for the investigation individually or collaboratively.
Describe factors used in the investigation including appropriate units (if necessary), independent and dependent variables, controls and number of trials for each experimental condition.
Perform the investigation as prescribed by the plan.
Use data from the investigation to provide an causal account of the relationship between the addition of removal of thermal energy from a substance and the change in the average kinetic energy of the particles in a substance.

Students understand that:

Adding or removing thermal energy from a system causes changes in particle motion of a pure substance.
Adding or removing thermal energy from a system causes changes in temperature of a pure substance.
Adding or removing thermal energy from a system causes changes in state of a pure substance.