variometer

"The recipe calls for a precise measure of baking soda. "

"The marching band practiced their formations on the football field. "

"My son is studying geology in school; he's fascinated by the Earth's rock formations. "

"The violinist was a master of her instrument."

"This question arises frequently."

"The product is undergoing a change in order to improve it."

"He is a student of life."

"As the altitude increases, the temperature gets lower, so remember to bring warm clothes to the mountains."

"The rising temperature on the thermometer is an indicator that the room is getting hotter. "

"a magnetic recorder"

"The aircraft flew over the school playground during the morning assembly. "

"The recipe for cookies allows for variations, like adding chocolate chips or nuts. "