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Savvas 8th Ch 2 L4 Models and Systems

Last updated almost 3 years ago

10 questions

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Question 1

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Question 2

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Question 3

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Question 4

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Question 5

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Question 6

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Question 7

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Question 8

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Question 9

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Question 10

10.

Scientists test their ideas about things they cannot observe directly by building

models

theories

systems

evidence

Models can help scientists understand a system’s

assumptions

investigations

processes

theories

Input, output, and process are parts of a(n)

system

assumption

model

hypothesis

Scientists may use a computer to keep track of the variables in a complex

model

program

feedback

system

A(n) simple system is difficult to model.

True

False

The mercury cycle, water cycle, and rock cycle are all models.

True

False

Your heart pumping faster when you exercise is an example of input.

True

False

Scientists may make assumptions to simplify a model.

True

False

The output of a toaster is electricity.

True

False

All models are physical objects.

True

False