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BC Science 9 Ch1
BC Science 9 Chapter 1
| Question | Answer |
|---|---|
| What does WHMIS stand for? | Workplace Hazardous Materials Information System |
| The amount of matter in a substance. | Mass |
| The amount of space a substance occupies. | Volume |
| Density | Mass/Volume |
| Smallest particle of a chemical element. | Atom |
| Two or more atoms joined together. | Molecule |
| Pure substance | Has the same identical physical and chemical properties always. |
| Loose mixture of items that can easily pick apart. | Mechanical mixture |
| Mixture of solids, liquids, or gases that appear to be one substance. | Solution |
| Mixture of a liquid with a solid that floats when mixed together. | Suspension |
| What is a chemical change? | A change in matter when new substances are produced. |
| What happens when a physical change occurs? | There may be a change in appearance, but no new substances are formed. |
| Particles of matter are always doing this? | Moving |
| Energy of motion | Kinetic energy |
| Found between particles | Empty space |
| Change of state: solid to liquid | Melting |
| Change of state: liquid to solid | Solidification |
| Change of state: solid to gas | Sublimation |
| Change of state: gas to solid | Deposition |
| Change of state: gas to liquid | Condensation |
| Change of state: liquid to gas | Evaporation |
| Properties that can be described but not measured | Qualitative |
| Properties that can be measured numerically | Quantitative |
| What is a pure substance? | Element or compound |
| Aristotle's four elements: | Earth, water, air, fire |
| Alchemists were looking for what? | Philosopher's stone (cheap metals to gold) |
| Dalton called the smallest particle of an element this? | Atom |
| A model to describe Thomson's model of the atom | Raisin bun model |
| Describes Thomson's model of the atom | A positively charge mass surrounded by negatively charged particles |
| Thomson described negatively charges; later called this | Electrons |
| Rutherford described the atom as being made up of mostly this? | Empty space |
| Rutherford called the centre of the atom this? | Nucleus |
| Rutherford described the atom this way? | A tiny dense centre called a nucleus with electrons around it |
| Bohr described the location of electrons this way. | Around the nucleus in specific energy levels or shells |
| What are the three subatomic particles? | Proton, electron, neutrons |
| Charge of a proton | Positive |
| Charge of an electron | Negative |
| Charge of a neutron | Neutral |
| Occupies the most space in an atom | Electron shells |
| Most of the mass in an atom is found here? | Nucleus |
| Heaviest subatomic particle | Proton or Neutron |
Created by:
darrinaustin
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