Unit Part

How many Al atoms are in this compound?         4Al₂O₃

• 2

• 8

• 6

• 4

Tags

NGSS.MS-PS1-1

a copper penny turning greenish after a few years.

• Chemical Change

• Physical Change

Tags

NGSS.MS-PS1-2

Which one of these is a chemical property?

• melting point

• boiling point

• color

• flammability

Ability to rust is this type of property:

• Physical property

• Chemical property

Tags

NGSS.MS-PS1-2

Select the subatomic particle that has a mass of 1 AMU.

Tags

NGSS.MS-PS1-1

Physical properties are

• properties that can be observed without changing the identity of the substance

• properties that describe how a substance changes into a completely different substance

which one is the definition of chemical property?

• a property or characteristic of a substance that is observed during a reaction where the chemical composition of a substance is changed

• any change that results in the formation of new chemical substances

• combustibility

Tags

NGSS.MS-PS1-2

Which change describes a substance that changes shape, form, or appearance but is still thesame substance?

• physical change

• chemical change

Tags

NGSS.MS-PS1-4

What happens when a new substance is produced during a reaction?

• chemical change

• physical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Marie had a beaker with a small amount of baking soda. She added a few drops of pickle juice to the baking soda and observed fizzing and bubbling. Based on her observation, which of these can Marie determine about the new substance formed by mixing the baking soda and pickle juice?

• A chemical reaction produced a solid.

• A chemical reaction produced a gas.

• No chemical reaction took place.

• Only a physical change happened.

Tags

NGSS.MS-PS1-2