Systems are

• human made to solve problems

• parts that work together

• a representation of something real

• the study of the natural world

Tags

NGSS.MS-LS1-3

NGSS.MS-LS2-3

A _____ is a representation of an object or a system.

• Theory

• Model

• Hypothesis

• Prediction

Tags

NGSS.MS-ESS1-1

The kind of model that represents relationships is

• Physical

• mathematical

• Conceptual

• Hypothetical

Tags

NGSS.MS-LS2-3

Which is a physical model:

• a comparison

• a math equation

• the plastic pull-apart eyeball in the optometrists office

• a graph

What is a problem with models?

• They are not real.

• They are large.

• They are on computers.

• They may be physical.

What would be the most useful type of model to show the structure of an eyeball?

• mathematical

• conceptual

• hypothetical

• physical

Which of the following is a limitation of a model?

• Less expensive and safer

• Used to test extreme conditions

• Able to repeat situations

• Makes assumptions or guesses about how things work

Tags

NGSS.MS-ETS1-4

A snail feeds on algae that consume the carbon dioxide produced by the snails. Which sentence describes this ecosystem?

• The algae make up a natural system that does not have any output.

• The snail is a mechanical system and carbon dioxide is an output.

• The output of the snail's system is the input for the algae's system.

• The input for both the snail's and the algae's systems is carbon dioxide.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-1

NGSS.MS-LS2-3

The information, material, energy, or any components that an engineer adds to a system are called __________.

• inputs

• outputs

• feedback

• systems theory

Which event describes an output in a car's engineered subsystem?

• starting the car

• burning fuel in the engine

• releasing fumes into the air

• pressing down on the car's brake

Tags

NGSS.MS-PS3-5