| A | B |
|---|
What weather instrument is this?,  | barometer |
| What does this weather instrument measure?, | air pressure |
| What weather instrument measures air pressure? | barometer |
What weather instrument is this?,  | mercury barometer |
What weather instrument is this?,  | anemometer |
| What does this weather instrument measure?, | wind speed |
| What weather instrument measures wind speed? | anemometer |
What weather instrument is this?,  | sling psychrometer |
| What does this weather instrument measure?, | relative humidity of the air |
| The amount of moisture in the air compared to how much it is capable of holding. (This is a percentage, %) | relative humidity |
| What does a psychrometer measure? | relative humidity |
What does this weather instrument measure?,  | temperature (the average energy of motion, or kinetic energy, of particles in matter.) How hot or cold the air is! |
