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SSA Review - Physics
Physical Science SSA Review
| Question | Answer |
|---|---|
| Law of Conservation of Energy | Energy can NOT be created or destroyed... but it CAN change forms. |
| Potential Energy | Stored energy |
| Kinetic Energy | Energy of movement |
| Force | A push or a pull on an object |
| Balanced Force | Does NOT change the speed or direction of the object |
| Unbalanced Force | Changes the speed and/or direction of the object in the direction of the stronger force |
| Law of Gravity | The force of attraction between objects. Its strength depends on the mass of the objects and their distance from each other. |
| Speed (Velocity) | Distance divided by time |
| Mechanical Energy | The combined energy of motion (kinetic) and position (potential) |
| Chemical Energy | Energy stored in chemical bonds |
| Thermal Energy | Heat |
| Sound Energy | Vibrations |
| Radiation | Energy that can travel through empty space EX: heat from the sun |
| Reflection | When light bounces off a surface Ex: a mirror |
| Refraction | When light bends as it goes through a material Ex: objects look larger/distorted in water |
| Absorption | When light stops at the object and is not reflected or refracted |
| Waves | How energy moves |
| Chemical Property | A property that involves changing the substance into something else Ex: the ability to rust or burn |
| Physical Property | A property that can be observed without changing the substance |
| Density | Mass divided by Volume |
| Volume | The amount of space an object fills |
| Mass | The amount of matter in an object |
| Weight | The amount of gravity pulling on an object. This can change if you go to another planet. |
| Chemical Change | Changes what a substance IS. Ex: Burning wood turns to ash |
| Physical Change | Changes the appearance of an object, it it is still the same substance. Ex: tearing a piece of paper |
| Atom | The smallest unit of an element |
| Protons | Positive charge, found in the nucleus |
| Neutron | Neutral charge, found in the nucleus |
| Electron | Negative charge, found in the electron cloud |
| Element | One type of atom, represented by each square of the periodic table |
| Molecule | More than one atom joined together |
| Solid | Atoms are tightly packed together. Have constant shape and volume. |
| Liquid | Atoms are more loosely packed. The volume is constant, but the shape can change. |
| Acid | pH of 0-6. Sour taste, react with metals. Ex: citrus juice, vinegar |
| Base | pH of 8-14. Bitter taste, feel slippery. Ex: Soap, ammonia, baking soda |
| Neutral | pH of 7. Ex: water |
| Homogeneous Mixture | substances are combined and can not be easily separated |
| Heterogeneous Mixture | substances can be easily separated |
| Gas | Atoms are spread far apart and move around freely. Can change volume and shape. |
Created by:
Stszerdy
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