Learn what infinity is in math. Get interesting infinity facts and examples. Learn the properties of this "number".| Science Notes and Projects
Learn what an exact number is in chemistry, physics, and math. Get the definition and examples of exact numbers.| Science Notes and Projects
Learn how to use the time between lightning and thunder to tell how far away lightning is. See how many seconds indicates one mile.| Science Notes and Projects
Learn about refraction in physics. Get its definition and explore Snell's law and the index of refraction. Get examples for light and sound.| Science Notes and Projects
See the visible light spectrum wavelengths and colors. Learn about colors beyond the visible spectrum and how our eyes see them.| Science Notes and Projects
Here are convenient reference tables for physical constants, unit prefixes, and conversion factors commonly used in scientific calculations.| Science Notes and Projects
Learn what gravity is in physics and astronomy. Get the definition, formulas, and table of gravity on other planets.| Science Notes and Projects
Get the definition of matter in science and see examples of different forms of matter. Contrast matter with dark matter.| Science Notes and Projects
Get the vacuum definition in science. See examples of a vacuum and learn ways to produce one in everyday life.| Science Notes and Projects