Unit 1 Chem A Review

What is the definition of matter?

• A substance that cannot be broken down into anything simpler or more stable

• The study of matter and its properties

• The smallest unit of an element that maintains the identity of the element

• A pure substance that can be broken down into simpler or more stable substances

What is the difference between an element and a compound?

• An element is a pure substance that cannot be broken down, while a compound is a pure substance that can be broken down

• An element is a combination of atoms, while a compound is a combination of elements

• An element is made up of one type of atom, while a compound is made up of two or more different types of atoms

• An element is a solid, while a compound is a liquid or gas

Tags

NGSS.MS-PS1-5

What is the difference between a homogeneous mixture and a heterogeneous mixture?

• A homogeneous mixture has a uniform composition, while a heterogeneous mixture has a non-uniform composition

• A homogeneous mixture is made up of two or more substances chemically combined, while a heterogeneous mixture is made up of two or more substances physically mixed

• A homogeneous mixture can be separated into its components, while a heterogeneous mixture cannot be separated

• A homogeneous mixture is a solid, while a heterogeneous mixture is a liquid or gas

Which of the following is an example of a physical property?

• Ability to react with other substances

• Ability to burn

• Ability to change color

• Ability to decompose

Which of the following is an example of a chemical change?

• Melting ice

• Boiling water

• Burning wood

• Cutting paper

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

What is the law of conservation of matter?

• Matter is never created or destroyed, only changed

• Matter can be created or destroyed

• Matter can only be changed into energy

• Matter can only be changed into a different state

Tags

NGSS.MS-PS1-5

Which of the following is evidence of a chemical reaction?

• Change in temperature

• Change in color

• Gas given off

• All of the above

Tags

NGSS.MS-PS1-2

What is the definition of an extensive property?

• A property that depends on the amount of matter present

• A property that can be observed without changing the identity of the substance

• A property that can only be observed by changing the composition of the substance

• A property that does not depend on the amount of matter present

What is the definition of an intensive property?

• A property that depends on the amount of matter present

• A property that can be observed without changing the identity of the substance

• A property that can only be observed by changing the composition of the substance

• A property that does not depend on the amount of matter present

What is the definition of a physical change?

• A change in substance that doesn't change its identity

• A change in substance that changes its identity

• A change in substance that only occurs in gases

• A change in substance that only occurs in liquids