The study of the composition, structure, properties, and reactions of matter.
The study of matter and energy and the interactions between the two thru forces and motion.
The study of the origin, history and structure of Earth.
The study of the universe beyond Earth.
The study of life and life processes.
An organized plan used for gathering, organizing and communicating info.
A proposed answer to a question
The variable that causes a change in another variable.
A variable that changes in response to a change in the manipulated variable.
A well-test explanation for a set of observations or experimental results.
A statement that summarizes a pattern found in nature.
A representation of an object or event.
A way of expressing a value as the product of a number between 1 and 10 and a power of 10.
The straight-line distance between two points.
The amount of matter in an object.
The amount of space an object takes up.
The ratio of a material's mass to its volume.
A ratio of equivalent measurements that is used to convert a quantity from one unit to another
A gauge of how exact a measurement is.
All the digits in a measurement that are directly measured, plus the last digit which is estimated
The closeness of measurement to the true value of what is measured.
The steepness of a line, equal to the ratio of a vertical change to the corresponding horizontal change.
A relationship between two variables in which their ratio is constant.
A relationship in which the product of two variables is a constant when all other variable are held constant.
Matter that always has exactly the same composition; an element or compound.
A substance that cannot be broken down into simpler substances.
The smallest particle of an element.
A substance that is made from two or more simpler substances and can be broken down into those simpler substances.
A type of mixture in which the parts of the mixture are noticeably different from one another.
A type of mixture in which the substances are so evenly distributed that it is difficult to distinguish one substance in the mixture from another.
A mixture that forms when substances dissolve and form a homogeneous mixture.
A heterogeneous mixture that separates into layers over time.
A mixture that contains some particles that are intermediate in size between the small particles in a solution and the larger particles in suspension.
Any characteristic of a material that can be observed or measured without changing the composition of the substances in the material.
The tendency of a liquid to keep from flowing; resistance to flowing.
Please allow access to your computer’s microphone to use Voice Recording.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Your microphone is muted
For help fixing this issue, see this FAQ.