SYSTEMS AND MODELS

Question 1

What is a system?

Answer 1

A system is a set of interrelated parts working together to form one complex whole.

Question 2

Types of systems

Answer 2

1. Open
2. Closed
3. Isolated

Question 3

What is an open system?

Answer 3

It is a system where there is an exchange of energy and matter.

Question 4

What is a closed system?

Answer 4

It is a ssytem where there is only an exchange of energy.

Question 5

What is an isolated system?

Answer 5

A system where there is no exchange of matter or energy.

Question 6

What are the components of a system?

Answer 6

1. Inputs
2. Outputs
3. Storages
4. Flows

Question 7

What is a model?

Answer 7

A model is a simplified version of reality used to understand hpw systems wor and predict how a system might react to change.

Question 8

Strengths of Models

Answer 8

• Results are easy to understand
• It helps scientists find out how a system might change if the inputs or storages are changed.
• It allows inputs to be changed and outputs to be examined without having to wait a long time.

Question 9

Weaknesses of Models

Answer 9

• Oversimplified = Loss of accuracy
• An enviromental system has many factors and it is very difficult almost impossible to take all factors into account. This leads to unaccurate results.
• Every model reacts in a different way. The same data could be used in different models and the outputs would be different.