Cumulative Exam — Cumulative exam Answers

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Which defines the average kinetic energy of a system’s particles?

density

pressure

temperature

volume

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The diagram below shows the different phase transitions that occur in matter.Which best describes the process that arrow 1 represents?

Molecules are speeding up during boiling.

Molecules are depositing as ice on a surface.

Molecules are slowing down during condensing.

Molecules are moving from stationary positions.

Which statement best explains why Earth’s outer core is in liquid form?

The iron-nickel alloy melts due to hot temperatures.

The outer core has a tarry consistency.

This region is less dense when compared to the mantle.

This region is under extreme pressure from the weight of other layers.

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Which compound most likely contains polar covalent bonds?

NaCl

AlF3

Br2

NF3

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