| A | B |
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| Which of the following is not a state of matter: plastic, solid, liquid, or gas? | Plastic |
| What is matter? | Anything that takes up space and has mass |
| What is the atomic number of an atom? | The number of protons |
| The nucleus of an atom contains _____ and _____. | Protons and neutrons |
| What is an element? | Matter that has only one kind of atom |
| Are the properties of a compound the same as the properties of the elements that make up the compound? Explain. | No, the properties of the compound are different from those of the elements that make it up. For instance, Sodium (Na) is an explosive substance and Chlorine (Cl) is a poisonous gas, but combined together, they make NaCl, or table salt, which is not poisonous or explosive. |
| What are the three states of matter? | Solid, liquid, gas |
| Explain how water can be found in all three states of matter. How does it change from one to the other? | Liquid water can evaporate to become a gas called water vapor. Water vapor can condense to become liquid water. Liquid water can freeze to become a solid called ice. Ice can melt to become liquid water. |
| What is a compound? | A substance that results when two or more elements join together chemically |
| Symbols that show the number and kind of atoms in a compound such as NaCl are called _____. | Chemical formulas |
| In a _____ the particles are physically combined but not dissolved. | Mixture |
| Amy shakes her salad dressing before she pours it on her salad. This is because the dressing is a _____. | Suspension |
| Dissolving sugar into tea is an example of a _____. | Solution |
| All elements are made up of _____. | Atoms |
| When an ice cube melts, what happens to the energy of the atoms in the ice? | The atoms gain energy. |
| What is the difference between a molecule of an element and a molecule of a compound? | A molecule of an element is two or more atoms of the same kind of element joined together. A molecule of a compound is made of different kinds of elements joined together. |
| Explain the difference between a mixture and a compound. | A mixture is two or more substances joined physically. A compound is two or more substances joined chemically. |
| The temperature at which a liquid changes to a solid is called _____. | The freezing point |
| When the temperature increases, molecules _____. | Speed up |
| Heating the air in a balloon makes the balloon _____. | Expand |
| In which state of matter are the particles most closely packed together? | Solid |
| In which state of matter are the particles most spread far apart from each other? | Gas |
| A particle with a negative charge in the atom is a(an) _____. | Electron |
| What is anything that has mass, takes up space, and can be a solid, liquid, or a gas? | Matter |
| The heaviest particles of an atom are found in the _____. | Nucleus |
| The smallest part of matter that maintains its properties is a(n) _____. | Atom |
| A particle in the atom that does not have a charge is the _____. | Neutron |
| The smallest part of a compound is a _____. | Molecule |
