Science Unit 1

A solid is one of the three states of matter, has mass and is made up of atoms.

A liquid is one of the three states of matter, has mass, volume and is made up of atoms.

A gas is one of three states of matter, has mass and takes up space it also has no fixed shape.

Matter is anything that has mass, volume and takes up space, matter is made up of atoms and is able to change states.

Solid, liquid and gas.

A substance is matter that has particular properties.

A pure substance is a single form of matter that cannot be physically separated in other types of matter.

A mixture is when two or more substances physically combine.

Talk about the differences.

A substance that dissolves is said to be soluble.

A substance that does not dissolve is said to be insoluble.

A solution (liquid) is homogenous mixture that looks and behaves like a single substance.

Solvent + Solute = Solution

The solvent is the substance that dissolves the other ( the solvent is always a liquid).

The solute is the substance that dissolves. (Can be a solid or liquid)

Qualitative data is referring to the qualities/descriptive.

Quantitative data is referring to quantities and is expressed in numbers.

Parallex error is the error you get from not reading the scale at 90 degrees

The Safety flame is what you get when the air hole is closed, it is also yellow, quiet and less hot than the working flame.

The Working flame is when the air hole is open, it is blue, noisy and very hot.

Controlled variable, independent variable and dependent variable.

The Controlled variable is the variable that remains the same through the whole experiment so it is a fair test.

The Independent variable is the variable is the one that is changed.

The Dependent variable is the variable that depends on other factors (is the one we measure)