Semester Review

What is the basic unit of matter and is the smallest particle of an element?

• atoms

• elements

• compounds

• molecules

Tags

NGSS.MS-PS1-1

Two or more atoms chemically bonded together are called a

• atom

• element

• molecule

• mixture

Tags

NGSS.MS-PS1-1

This is anything that has mass and takes up space (meaning it has a volume).

• mass

• element

• energy

• matter

Tags

NGSS.MS-PS1-5

Is NO₂ an element or a molecule?

• element

• molecule

Tags

NGSS.MS-PS1-1

How many carbon atoms are there in C₃H₁₂O₅?

• 1

• 3

• 12

• 5

Tags

NGSS.MS-PS1-1

Coal contains carbon and other elements. Carbon dioxide forms when coal burns in the presence of oxygen. Which of these is the best evidence that a chemical reaction occurs when coal burns?

• The shape of the coal changes

• Oxygen is present

• A new substance is produced

• Coal is made up of more than one element

Tags

NGSS.MS-PS1-2

Is burning wood a chemical or physical change?

• chemical

• physical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The process by which one or more substances change to produce one or more different substances

• chemical process

• chemical reaction

• reactants

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What are Chemical Reactions?

• It's when you mix substances.

• a process in which atoms rearrange to form new substances

• When something bubbles.

• letter and numbers showing the types and number of atoms

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

the starting materials in a chemical reaction are called what?

• products

• starters

• reactants

• enders