Which of the following is a physical property?

• ability to burn
• ability to rust
• density
• how a metal reacts with acid

Tags

NGSS.HS-PS1-3

2 or more substances chemically combined

• element
• compound 
• mixture

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Which is not a sign of a chemical change?

• water evaporating
• gas bubbles
• color change
• temperature change

Tags

NGSS.MS-PS1-2

pure substances that can not be broken down into other substances

• element
• compound 
• mixture

In which state of matter do the particles spread apart and fill all the space available to them?

• solid
• liquid 
• gas

Two or more substances that are together but not chemically combined are:

• element
• compound
• mixture

Most elements on the periodic table are

• metals
• nonmetals
• metalloids

How many different elements does CO₂ contain?

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-1

An element is composed of only one type of 

• atom
• molecule
• compound
• mixture

Which of the following cannot be broken down into a simpler substance?

• water
• sand
• the element silver