| A | B |
|---|
| matter | anything with mass and takes up space |
| mass | the total amount of matter in something |
| combine | to put together |
| volume | total amount of space something takes up |
| weight | measure of the force of gravity on an object's mass |
| atom | smalles part of something we can identify |
| particles | very small pieces |
| protons | postively charged particles in an atom's nucleus |
| neutron | negatively charged particles in the atom with no charge |
| nucleus | the center of an atom |
| electron | particles that move around the nucleus and have a negative charge |
| neutral | has an equal number of positive and negative charges |
| attracted | pulled toward |
| repel | push away |
| substance | certain kind of matter, (soild, liquid, water, air, wood) |
| element | matter made of just one kind of atom |
| properties | what makes something what it is |
| molecules | two or more atoms combined |
| compound | matter made of two or more elements |
| chemical reation | when atoms gain, lose or share electrons |
| separate | to take apart |
| mixture | two or more substances that combine and can be separated |
