Question | Answer |
The amount of space an object occupies | Volume |
The amount of matter an object contains | Mass |
The amount of matter in a given volume | Density |
S.I. unit of length | Meter |
S.I. unit of mass | Kilogram |
S.I. unit of volume | Liter |
S.I. unit of temperature | Celsius |
An educated guess, possible explanation or answer to a question | Hypothesis |
The independent or manipulated variable - plotted on the horizontal axis | The X-axis |
The dependent or responding variable plotted on the vertical axis | The Y-axis |
The three types of galaxies | Spiral, elliptical, and irregular |
Spinning clouds of gasses that radiate heat and light | Stars |
The process that causes stars to shine and give off light. The star's hydrogen atoms fuse together creating helium atoms, which releases a tremendous amount of energy | Nuclear fusion |
Most astronomers believe in this theory that states that the universe began as a concentrated area of matter and energy that exploded | Big Bang Theory |
Stars follow this which is dependent on the mass of the star | Life Cycle |
Small and medium stars cool to become these | White dwarfs |
Small and medium stars become white dwarfs that burn out to come these | Black dwarfs |
Massive and super massive stars die and become these | Black holes or neutron stars |
The distance to stars outside our solar system is measured in this unit | Light year |
Huge collections of billions of stars held together by gravity | Galaxies |
This diagram displays the main characteristics of stars | Hertzprung-Russell diagram (or H-R diagram) |
Stars spend most of their life cycle in this phase | Main sequence phase |