Sol 6.5 Matter

Which of the following is a sign that a chemical reaction has occurred?

• change in shape

• melting

• formation of a gas

• dissolving

Tags

NGSS.MS-PS1-2

When you break a cracker into pieces it is a 

• Chemical change

• Physical change

• Chemical Weathering

• Physical Weathering

Is burning wood a chemical or physical change?

• chemical

• physical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which statement identifies why oxygen is classified as a pure substance and air is classified as a mixture?

• Oxygen is more reactive than air.

• Oxygen has a higher density than air.

• Oxygen goes under a phase change, whereas air is always a gas.

• Oxygen contains only one substance, but air contains several substances.

DIFFERENT kinds of atoms chemically combine to form a pure substance called

• Mixture

• Element

• Compound

• Substance

This contains a variety elements and compounds that ARE NOT chemically combined.

• Water

• Mixture

• Elements

• Compounds

Which of the following is an element?

• Sugar

• Salt

• Water

• Oxygen

This is made up of one or more of the SAME kind of atom

• Element

• Mixture

• Compound

• Matter

Tags

NGSS.MS-PS1-1

A pure substance...

• is an element or a compound

• is an element or a mixture

• is a compound or a mixture

• is a mixture

A pure substance that cannot be separated into simpler substances by chemical or physical means.  

• Element

• Compound

• Mixture

• Chemical