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

Which of these phrases describes the results of a chemical change? 

• charred wood, ash, and smoke 
• salt dissolving in water 
• gold nuggets melting 
• a dented car door

Tags

NGSS.MS-PS1-2

Is mold growing on cheese a physical or chemical change?

• Physical 
• Chemical

Tags

NGSS.MS-PS1-2

Tammy wanted to test the pH of a liquid solution. She added three drops of Phenol Red to solution, after a few moments she noticed a bright yellowish cooler. What is most likely the pH of the solution?

• 6.8 or below

• 8.2 and above

• Neutral

• None of these because I do not have enough information.

Tags

NGSS.MS-PS1-2

In the following equation, what are the products?
HCl + Zn → H₂ + ZnCl₂

• HCl + Zn
• H₂ + ZnCl₂
• Zn → H₂
• the stuff on the outside

Tags

NGSS.MS-PS1-2

When a new material is formed, this is a sign that a ___________ change has taken place.

• chemical

• physical

• scientific

• temporary

Tags

NGSS.MS-PS1-2

Paula works at a paint company and is developing new ingredients to make paint safer to use. She mixed two colorless substances together in a sealed container. The diagram above shows the repeating groups of atoms that make up the two starting substances.

After mixing, Paula found two yellow substances in the sealed container. (Nothing had escaped.) Which of the diagrams to the left shows the repeating groups of atoms that make up the ending substances?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-2

Carbonic acid is formed in nature when -

• Water dissolves particles of soil to form mud

• The oxygen molecules in water bond with minerals in rocks

• Water bonds with carbon dioxide in the air and/or soil

Tags

NGSS.MS-PS1-2

When Caleb poured Phenol Red on baking soda, which of the following was a sign that a chemical change occurred?

• it tore in half

• it fizzed and produced gas

• it glowed

• Payne smiled

Tags

NGSS.MS-PS1-2

Lemon drop turns

• Red litmus into blue

• No reaction

• Blue Litmus into red

• All of them

Tags

NGSS.MS-PS1-2