Energy Matter& Change

Conduction requires

• Electricity

• the electromagnetic spectrum and particles

• air or water flow

• direct contact

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The movement of fluids due to the uneven heating like in a lava lamp is called

• rip currents

• counter currents

• convection currents

• artificial movements

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You get sunburned due to __________ from the sun.

• conduction

• convection

• radiation

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Which of the following are examples of heat transfer. Choose ALL that apply!

• radiation

• convection

• conduction

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?

• High Accuracy & High Precision
• High Accuracy & Low Precision
• Low Accuracy & High Precision
• Low Accuracy & Low Precision

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A pot of water is brought to a boil until all the water is changed to water vapor.

Which of the following describes the changes in the water molecules? Choose 2 answers.

• The molecules slow down

• The molecules speed up

• The molecules move farther apart

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NGSS.MS-PS1-4

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A teacher adds a compound to a flask filled with water. The teacher notices that a reaction occurs and the water temperature decreases quickly. Which of these statements are true about this reaction? Choose 2 answers.

• This reaction is an example of an endothermic reaction.

• When the compound and water mixes, a decomposition reaction takes place.

• This is an example of a chemical reaction in which heat is added from its environment.

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How is this increased speed, or kinetic energy in molecules measured?

• calculating the distance they traveled in a particular amount of time

• change in temperature of the substance is determined

• counting the number of bonds broken, and comparing that to the number of particles present

• the particles are too small, and any changes cannot be mesaured

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What are some characteristics of endothermic and exothermic reactions? Choose ALL that apply!

• In an exothermic reaction, heat is released

• Endothermic reactions are cooler

• Exothermic reactions are warmer

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Photosynthesis & melting are examples of __________. Choose 2 answers.

• endothermic reactions

• exothermic reactions

• CaCl2 (s)+ H2O (l) -> Ca (aq) + Cl (aq) + energy

• the burning of sugar

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