Vocabulary Warm-up – Part 25

.Fill in the blanks with correct forms of the following words

Cool down / expand / disconnect / contract / heat up / bend / connect

The most important part of this object is a strip of two different metals, one on top of the other. As they ……. , both metals ……. , but one does it faster than the other. The strip ……. and ……. with a switch, which turns off the power supply
……. When the strip ……. , the metals ……. and the switch is

: ANSWERS

heat up / expand / bends / connects / cools down / contract / disconnected