Unit 7.2 Test Review (Open Sci Ed)

Which of the following best describes an exothermic reaction?

• Feels cool, energy enters the reaction system

• Feels warm, energy exits the reaction system

• The things we do to make our solution the best or ideal

• Desired features or standards that your design should meet

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NGSS.MS-PS1-4

NGSS.MS-PS3-5

What is a prototype?

• A final version of a product

• An early model or version of a product, service, or idea

• A chemical reaction that releases energy

• A list of desired features for a design

Tags

NGSS.MS-ETS1-4

What does it mean to optimize a solution?

• To create an early model of a product

• To make our solution the best or ideal

• To identify the standards a design should meet

• To add energy to a reaction system

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NGSS.MS-ETS1-1

NGSS.MS-ETS1-4

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If a chemical reaction feels cool to the touch, what type of reaction is it most likely to be?

• Exothermic

• Endothermic

• Prototype

• Criteria

Tags

NGSS.MS-PS1-4

How does energy flow in an exothermic reaction?

• From the surroundings to the system

• From the system to the surroundings

• Only within the system

• Only within the surroundings

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NGSS.MS-PS1-4

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Why is creating a prototype important in the design process?

• It is the final product

• It helps test and improve ideas before finalizing a solution

• It sets the standards for the design

• It adds energy to the system

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NGSS.MS-ETS1-4

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What is the definition of "constraints" in the context of design?

• The factors that limit or restrict your design options

• The materials used in your design

• The steps needed to build a model

• The people who test your design

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NGSS.MS-ETS1-1

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Why are MREs (Meals Ready to Eat) important, and where might they be used?

• They are used for decoration in homes.

• They are important for providing food in situations where cooking is not possible, such as in the military or during emergencies.

• They are used to clean laboratory equipment.

• They are important for making desserts at parties.

If you observe a chemical reaction in a hand warmer, which of the following concepts are you most likely studying?

• Mixture

• Flammability

• Reactants and Products

• Density

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NGSS.MS-PS1-2

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What happens to particles (atoms) during a chemical reaction?

• Particles disappear completely

• Particles break apart and rearrange

• Particles stay exactly the same

• Particles melt into a liquid

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NGSS.MS-PS1-2

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