1. Properties of Stars: Mass (41)

2. Stars & Mass Mass: How much matter is in an object. Main evidence for star mass is its gravity. Gravitational effects can be observed on other objects and be used to determine a star’s mass.

6. Matter & Gravity All matter produces gravity. Gravitational force depends on mass and how close the object is. – More mass = more gravity. – Less distance between objects = more gravity.

7. Einstein and Gravity Space and time are the same thing – Serves as the “fabric of the universe”. Gravity is the curving of space-time created by an object’s mass. Objects with greater curves will cause objects with less mass/curve to fall toward it.

15. Quantum physics indicates a theoretical particle (graviton) that controls gravity.

16. Mass & Star Families Main sequence stars: Larger stars are hotter. Mass-luminosity relationship – massive are more luminous.

17. Mass & Star Families (cont.) Giants and supergiants: Greatly vary in size Have little mass for their size (.001-.00001 g/cm 3 ).

18. Mass & Star Families (cont.) White dwarfs: ½ to 1 solar mass. Very high density because they have a mass equal to the sun but are the size of the earth. Teaspoon of white dwarf material: 15 tons on earth.

19. Mass & Star Families (cont.) Most common stars are red and white dwarfs – Dim stars because they are so small. Large stars are very rare, but are easier to see because they are so bright.

20. Mass Super Hero (40) Design a comic book hero or villain based on a science concept we just discussed. The superpower must relate to the science concept. Draw an illustration showing the hero/villain using their superpower. Write 4-6 sentences explaining how the illustration and superpower relate to the concept.