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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. |