Anne Helmenstine


The solvent is the part of a chemical solution present in the greatest percent. Solutes dissolve into solvents.
The solvent is the substance that dissolves the solute and the component of a chemical solution present in the greatest amount. While most common solvent are liquids, a solvent can be a solid or gas. The word “solvent” comes from the Latin word “solvō,” which means “to loosen or solve.” […]

What Is a Solvent? Definition and Examples   Recently updated !


Supercooling water is easy if you use bottled water. All you need is a bucket of ice or your home freezer.
Supercooling water is easy and fun. Basically, you chill water below its freezing point and crystallize into ice on command. Here are step-by-step instructions for supercooling water using two different methods. Method #1: Supercooling Bottled Water Supercooling bottled water in a home freezer is the easy. The only “trick” is […]

Supercooling Water – 2 Easy Ways to Supercool Water   Recently updated !


Diffusion is the movement of molecules from higher to lower concentration. In osmosis, only the solvent (water) is free to move across a semipermeable membrane from higher to lower concentration.
Osmosis and diffusion are two important types of mass transport. Here are the definitions of osmosis and diffusion, examples of each process, and a look at the differences between them. Osmosis and Diffusion Definitions Osmosis – Osmosis is the movement of solvent particles (usually water) across a semipermeable membrane from […]

Osmosis vs Diffusion – Definition and Examples   Recently updated !




The light year is a unit of length used to measure vast distances, like between galaxies.
The light year (ly) is a unit of length that is the distance light travels in a vacuum in one Earth year. One light year is approximately 9.46 trillion kilometers (9.46 x 1012 km) or 5.88 trillion miles (5.88 x 1012 mi). The light year is used to describe distances to stars without having to use very […]

What Is a Light Year? Definition and Examples   Recently updated !


Use a graduated cylinder or narrow glass to illustrate the different density values of common liquids.
This is a table of density of common materials. Density is a measure of the amount of matter per unit of volume. This is the mass per volume of a substance. Generally, gases are less dense than liquids, which are less dense than solids. However, there are many exceptions. For […]

Table of Density of Common Materials   Recently updated !