Which of the following temperature is the coldest:
1) -20 degree Celsius
2) -20 degree Fahrenheit
3) 220 kelvin

In the reaction between a crushed antacid tablet and vinegar what gas is emitted

How does the viscosity of magma change as magma cools?

Pastoral farming is best described as a. a method of raising livestock and moving herds b. an african method of agriculture c. a method of cultivating crops on poor soils d. a common method of desert farming select the best answer from the choices provided a b c d