CHEMICAL REACTIONS quiz review

Our baking soda and vinegar reaction took place in a flask with an attached balloon. This system provided a barrier in which matter could not enter or exit. What do we call such a system?

• open system

• closed system

• chemical system

• carbon dioxide system

Tags

NGSS.MS-PS1-2

What were the PRODUCTS of the baking soda and vinegar chemical reaction?

• the flask with attached balloon

• I would need to see the balanced chemical equation

• baking soda and vinegar

• carbon dioxide, water, and a salt

Tags

NGSS.MS-PS1-2

Which best describes ALL REACTANTS in the baking soda and vinegar chemical reaction lab?

• baking soda

• vinegar

• baking soda and vinegar

• carbon dioxide gas, water, and a salt

Tags

NGSS.MS-PS1-2

For this chemical equation, what does the arrow represent?

• reactants

• a closed system

• yields (produces)

• products

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

How many products are in this chemical equation?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-2

How many reactants are in this chemical equation?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

This chemical equations follows the Law of Conservation of Mass because....

• heat was released during the reaction

• heat was absorbed during the reaction

• all types and amounts of atoms in the reactants = the same types and amounts of atoms in the products

• matter was either created or destroyed during the chemical reaction

Tags

NGSS.MS-PS1-5

Which of the following would be an example of an endothermic reaction?

• You pile logs together and, with parental supervision, enjoy a bonfire!

• You use a commercial cold pack (2 chemicals inside a pack that combine and react) to soothe an aching muscle.

• You enjoy a car ride (thanks to the chemical reaction of combustion within the car's engine).

• You use a commercial heat pack (2 chemicals inside a pack that combine and react) to keep your hands warm on a cold day.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

A chemical reaction is taking place within a beaker. During the reaction, you hold the beaker and notice it's very warm to the touch. This is a sign that the chemical reaction is....

• absorbing greater energy than being released.

• releasing greater energy than being absorbed.

• overreacting. Get your teacher's attention immediately!

• one in which you must wear gloves and an apron for safety.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-4

You conduct a chemical reaction within a beaker. You combine the reactants and mix with a thermometer, checking the temperature every fifteen seconds. The data collected during the first minute of the chemical reaction: 15 sec. 17C, 30 sec. 15C, 45 sec. 13.5C, 60 sec. 13.5C. Your data indicates this reaction is....

• hypothermic!

• exothermic!

• endothermic!

• more data needs to be collected

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4