NOS Merged Review Grade 8

A _____________________ is something that scientists use to represent an object or process

• mass
• matter
• model
• weight

Tags

NGSS.MS-LS1-2

NGSS.MS-PS1-1

Which of these is not a model?

• hot wheels/match box car
• action figure doll
• dump truck
• a picture of the inside of humdinger

Tags

NGSS.MS-ETS1-4

Sal is studying the solar system. He makes a physical model using different-sized foam balls to represent the planets. Which best describes why a physical model is a useful tool for studying the solar system?

• Solar system models can be used to study a system that is too big to study directly.
• A model of the solar system eliminates the need for scientists to study the solar system directly.
• A model of the solar system provides an exact replica of the actual solar system, so scientists can experience what each planet is like.
• A model of the solar system can provide more data about the solar system than direct observations.

Tags

NGSS.MS-ESS1-2

Facts, figures and other evidence collected

• Pie
• Cake
• Math
• Data

Tags

NGSS.MS-PS1-2

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Creating representations of complex objects or processes.

• evaluating
• making models
• scientific investigation

Tags

NGSS.MS-ETS1-4

NGSS.MS-PS1-1

NGSS.MS-ESS2-4

NGSS.MS-LS2-3

Pick the reasons why we use models

• Models are expensive

• Models help you understand complex systems

• Models are used when systems are too expensive or impossible to use

Models can be helpful in scientific investigations because

• it may not be possible to work with the real thing.

• they can be smaller and more manageable than the real thing.

• they can be safer to work with than the real thing.

• all of the above

Tags

NGSS.MS-ETS1-4

A tennis ball could be used to represent the sun because it's round and yellow. Which of the following could also be used to model the sun?

• a light bulb

• an empty cup

• an eraser

• a Kleenex box

What is the advantage of creating a model of a dinosaur?

• they are too large to easily study 
• they are too complicated to study
• Real dinosaurs cannot be studied because they are extinct
• The model is safer to work with. 

True or False--A model can never be revised.

• true
• false

Tags

NGSS.MS-ETS1-4

NGSS.MS-ETS1-3