Question

Metal bridges can be affected by very hot temperatures on a summer day. Which of these statements describes how a metal bridge is affected by temperature? Select two answers.
Responses
A The metal contracts and becomes less stable. The metal contracts and becomes less stable.
B The molecules of the bridge move more slowly. The molecules of the bridge move more slowly.
C The molecules of the bridge move more quickly. The molecules of the bridge move more quickly.
D The metal of the bridge expands. The metal of the bridge expands.
E The metal bridge is unaffected by the temperature. The metal bridge is unaffected by the temperature.

Answer 1

C and D.

Heating makes the atoms/molecules move more quickly (higher kinetic energy), which causes the metal to expand (thermal expansion).