Open and Closed Systems

An open system

• when a chemical reaction occurs in an area where matter is allowed to enter and escape

• when a chemical reaction occurs in an area where matter is NOT allowed to enter and escape

A closed system

• when a chemical reaction occurs in an area where matter is allowed to enter and escape

• when a chemical reaction occurs in an area where matter is NOT allowed to enter and escape

Which of the following is an example of an open system?

• b) A fish tank with a filter

• d) A closed book

• a) A sealed jar of cookies

• c) A locked safe

What is the definition of a closed system?

• A closed system is a physical system that allows the transfer of matter and energy across its boundaries.

• A closed system is a system that is shut down and no longer in use.

• A closed system is a physical system that does not allow the transfer of matter or energy across its boundaries.

• A closed system is a virtual system that exists only in computer simulations.

True or False: An open system allows the exchange of matter and energy with its surroundings.

• An open system only allows the exchange of matter with its surroundings

• An open system only allows the exchange of energy with its surroundings

• True

• False

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

True or False: A closed system does not allow the exchange of matter and energy with its surroundings.

• True, a closed system only allows the exchange of matter with its surroundings

• True

• False, a closed system only allows the exchange of energy with its surroundings

• False, a closed system allows the exchange of matter and energy with its surroundings

Tags

NGSS.MS-PS3-4

Which of the following is an example of an open system?

• A locked safe

• A closed book

• A battery-powered flashlight

• A thermos bottle

Which of the following is an example of a closed system?

• b) A windmill

• c) A car engine

• d) A window

• a) A refrigerator

True or False: An open system can be completely isolated from its surroundings.

• False

• Sometimes true

• Partially true

• True

True or False: A closed system can exchange matter and energy with its surroundings.

• False

• Sometimes true

• Partially true

• True

Tags

NGSS.HS-PS3-4