Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
11 Cards in this Set
- Front
- Back
|
CELESTIAL BODIES |
objects in our universe held together by gravity ex. galaxies, stars, planets, moons, and asteroids |
|
|
STAR |
huge ball of gas and dust that gives off light energy (hydrogen & helium) |
|
|
NUCLEAR FUSION REACTION |
hot core fuses (joins) hydrogen atoms to form helium- produces light energy until it runs out (dies) |
|
|
STARS ARE DIFFERENT (vary) IN: |
*mass * size * color * temperature- hot or cooler * luminosity- how dim or bright *age- longer or shorter life *distance from earth |
|
|
STAR MASS |
determines its temperature , luminosity (brightness), life and death (age) ex. large mass= hotter, burns more fuel and has shorter life |
|
|
HR DIAGRAM |
a scatter graph of stars showing the relationship between stars |
|
|
LUMINOSITY |
brightness of a star; determined by distance and size |
|
|
COLOR |
an indicator of a star's temperature |
|
|
SURFACE TEMPERATURE |
+ increases from right (cooler) to left (hotter) on HR Diagram |
|
|
LUMINOSITY (BRIGHTNESS) |
+ increases from bottom (dim) to top (bright) on HR Diagram |
|
|
STELLAR NEBULA |
First stage of a star-huge cloud of dust and gas |
