Chemical/Physical properties, changes and reactions

Which of the following tells you that a chemical change may have occurred?

• Change Shape
• Melting
• Vaporizing
• Change in color

Tags

NGSS.MS-PS1-2

What happens in ALL chemical changes?

• Change in state of matter
• A new substance is formed
• Bubbles are produced
• An explosion

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Is wood burning a physical or chemical change?

• Physical 
• Chemical

Tags

NGSS.MS-PS1-2

Is milk going sour a physical or chemical change?

• Physical 
• Chemical

Tags

NGSS.MS-PS1-2

Is Gatorade powder dissolving in water physical or chemical change?

• Physical 
• Chemical

Tags

NGSS.MS-PS1-2

In a chemical reaction, how do the reactants compare to the products?

• They are the same
• They are different

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When Hydrogen and Oxygen combined to form water, 

• a reactant is produced
• it rained
• a physical reaction occurred
• a chemical reaction occurred

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

NGSS.MS-PS1-1

Hydrogen and oxygen react to form water. At an atomic level, how do we know that a chemical reaction has occurred?

• Hydrogen molecules are negative, and oxygen is positive.

• For every oxygen atom, to hydrogen atoms are needed.

• The hydrogen and oxygen atoms regroup to form a new molecule.

• Oxygen atoms are much larger than hydrogen atoms.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In physical changes, substances might change in _____ but not in ______.

• volume and state of matter

• texture, color

• appearance, composition

• weight, mass

Tags

NGSS.MS-PS1-4

what happens to atoms after a chemical change?

• they remain in the same place

• they link up in different ways

• they become bigger

• they dissolve to form a mixture

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5