How can you tell if a lab thermometer contains mercury, a toxic substance? a. the liquid would appear black. b. the liquid would appear silver. c. the thermometer is made of glass. d. the thermometer is made of plastic.

1. Option B. The liquid would appear silver

2. Option A. The liquid would appear black.

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

hope it

3

explanation: