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1st semester Vocab
10 pts. for the Wonderful Winter Wrap Up Project
| Term | Definition |
|---|---|
| Graduated cylinder | An instrument used to measure the volume of an object. |
| Triple beam balance | An instrument used to measure the mass of an object. |
| Observations | Observations are made using one or more of your senses to gather information. |
| Inferences | Inferences are made when a reasoned opinion is made based on observations and experiences. |
| Predictions | A prediction is an opinion about what will happen in the future. |
| Chemical change | A chemical change occurs when a chemical reaction takes place and the substances created during a chemical reaction are completely differently from the original substances. |
| isotope | When there are a different number of neutrons than protons in an atom. |
| ion | When there are a different number of electrons than protons in an atom. |
| groups | The vertical rows on the Periodic Table. |
| periods | The horizontal rows on the Periodic Table. |
| 1st law | An object at rest will stay at rest, and an object in motion will stay in motion until acted on by an unbalanced force. |
| 2nd law | States that the acceleration of an object depends on the mass of the object and the amount of force applied to the object. |
| 3rd law | States that for every action, there is an equal and opposite reaction. |
| speed formula | s=d/t |
| unbalanced force | All forces acting on the object are not equal. |
| light year | The distance it takes light to travel in space. |
| Osillating theory | The idea that big bangs follow big crunches in a never ending cycle. |
| Big Bang theory | The idea that the universe started out as a condensed mass a few millimeters across. It existed for a fraction of a second before an explosion caused the universe to expand very quickly, and it is still expanding, at a slower rate, today. |
| Steady State theory | Herman Bondi stated that everything in the universe looks essentially the same from every spot at any time. |
| HR diagram | A diagram that graphs the temperature and luminosity of all stars and easily shows each star in relation to another. |
| Apparent Magnitude | The apparent magnitude of a star describes how bright a star appears as viewed from Earth. |
| Absolute Magnitude | The absolute magnitude of a star describes how bright a star actually is. |
| Elliptical galaxies | Galaxies that contain older stars and very little gas and dust, they vary in shapes from spherical to football-shaped. |
| Irregular galaxies | Galaxies that have undefined shapes and consists of very, young starts, gas, and dust. |
| Spiral galaxies | Galaxies that resembles a pinwheel with arms that spiral outwards as it rotates and contain more middle-aged stars along with clouds of dust and gas. |
Created by:
s0205202
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