Grade 08 Science - EC: S8.A.3.1.3

Continuum of Activities

The list below represents a continuum of activities: resources categorized by Standard/Eligible Content that teachers may use to move students toward proficiency. Using LEA curriculum and available materials and resources, teachers can customize the activity statements/questions for classroom use.

This continuum of activities offers:

Instructional activities designed to be integrated into planned lessons
Questions/activities that grow in complexity
Opportunities for differentiation for each student’s level of performance

Grade Levels

8th Grade

Course, Subject

Science

Related Academic Standards / Eligible Content

S8.A.3.1.3 S8.A.3.1.3

Distinguish among system inputs, system processes, system outputs, and feedback (e.g., physical, ecological, biological, informational).

Activities

What is system feedback?

How are system output and system feedback related?

Mary argues that the human body is a good example of a system that uses feedback. Give an example to support her statement. Make sure to also explain the system input, process, and output that is related to the feedback.

Answer Key/Rubric

System feedback occurs when the output of a system is communicated back to the system input mechanism.

Acceptable responses may include, but are not limited to:
- System output is product that is created by a system.
- System feedback occurs when the output of a system is communicated back to the system input mechanism.
- The system will then adjust itself based on this feedback to achieve the desired output.

Acceptable responses may include, but are not limited to:
- Body temperature: The body becomes too hot. The brain sends a signal. The body begins to sweat. As the sweat evaporates, the body cools down. The body temperature drops. Eventually, the sweating will also stop.
- Pain: The skin touches something. Nerve endings feel pain and send a message to the brain. The brain sends impulses to the muscles to move. When the skin is no longer in contact with the object that initially caused the pain, the pain will stop.