In our investigation, Calcium Choride, baking soda, and water mixed together to form what product? (a)  

• powder
• citric acid
• chalk

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A gas is described as a

• state of matter that is rigid and hard

• state of matter where the particles are really close together

• state of matter that is shapeless and expands to fill any closed container it is placed in

Tags

NGSS.MS-PS1-4

In a ________ change, a substance changes into a different substance.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is a chemical change? (a)  

• cutting your hair
• boiling water
• melting ice cream
• burning wood

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What does the law of conservation of matter say?

• A substance does not change properties

• a physical reaction changes a substance into a new substance

• a chemical reaction must always explode

• even though a chemical change happens, the amount of matter does not change

Tags

NGSS.MS-PS1-5

What is a chemical reaction?

• the process in which two or more substances combine to make new substances that have different properties

• a state of matter that is shapeless and fills any container it is placed in

• a solid material that forms during a reaction

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

How can you tell if a gas was produced in a chemical reaction? (a)  

• flames come out of the solution
• bubbles/fizzing
• the mixture changes color

Tags

NGSS.MS-PS1-2

What is a precipitate?

• the starting substance in a chemical reaction

• the bubbles formed in a chemical reacion

• a solid material that forms during a chemical reaction

Which of these is an example of a physical change? (a)  

• Mixing baking soda and vinegar
• A fire
• An airbag going off in your car
• Ice cream melting

True or False? Citric acid is added to foods to give them a tangy or sour taste.

• True

• False