Question

1) What happens to the Mercury on a cool day in a thermometer??

Answer 1

it's level goes down

Step-by-step explanation:

because the temperature is low, so mercury level is down

Answer 2

Like most liquids, mercury expands, or gets bigger, when heated. As the environment gets warmer, the expanding mercury inside the narrow glass tube of the thermometer has nowhere to go but up. When the temperature cools, the mercury slides back down the tube.