What is an ice age?

a; a recent increase in the average global temperature near earth’s surface
b; a period of time when temperatures across the planet are colder than normal
c; a characteristic of winter that returns seasonally
d; the loss of heat in coastal areas from la niña storms

Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?

Which type of intermolecular force is pbr3

Why is it possible for different microorganisms to extract energy not only from carbohydrates and other biological molecules but from a large variety of substances?