Matter Assessment Prep
| # | Answer |
|---|---|
| 1 | Matter is anything that has mass and takes up space. |
| 2 | Solid, liquid, and gas. |
| 3 | A solid has a fixed shape and a fixed volume. |
| 4 | A liquid has a fixed volume but no fixed shape. |
| 5 | A gas has neither a fixed shape nor a fixed volume. |
| 6 | The particles gain kinetic energy and vibrate more quickly around their fixed positions. |
| 7 | A physical change is a change in form or state without changing the substance’s identity, such as melting ice. |
| 8 | Mass is the amount of matter in an object, while weight is the force of gravity acting on that mass. |
| 9 | Density measures how much mass is contained in a given volume. |
| 10 | Density = mass ÷ volume = 200 g ÷ 50 cm³ = 4 g/cm³. |
| 11 | Its density is less than the density of water. |
| 12 | Gas particles are much farther apart, so there is more empty space that can be reduced by pressure. |
| 13 | Evaporation happens at the surface of a liquid and can occur at many temperatures, while boiling happens throughout the liquid at a specific boiling point. |
| 14 | The 150 g sample is more dense. Its density is 1.5 times the density of the 300 g sample because density is proportional to mass when volume is the same. |
| 15 | The solid melted into a liquid, and the liquid evaporated or boiled into a gas. The particles gained energy, moved faster, became less ordered, and spread farther apart. |