TOCpg 1-14 Unit Plan: Relationship Between the Sun, Earth, and Moon pg 1 Moon Vocab Quiz pg 2 Moon C-Notes pg 3 Moon 2 C-Notes pg 4 Moon Spinner pg 5 Moon Vocab Quiz pg 6 Moon-Phase Prediction Sheet HW pg 7 Post-It pg 8 Seasons C-Notes pg 9 Tides and Leap Year C-Notes pg 10 Unit plan: The Universe pg 11 Light Year and Universe C-Notes pg 12 HR Diagram and Stars C-Notes pg 13 HR Diagram Practice pg 14

I CAN interpret and classify stars using the HR Diagram

H-R Diagram/Stars

4 Characteristics of Stars Size Size Color Color Temperature Temperature Brightness Brightness

Size Stars range greatly in size from large supergiants to very small dwarfs. Stars range greatly in size from large supergiants to very small dwarfs. Our star, the Sun, is considered to be average in comparison to the size of other stars. Our star, the Sun, is considered to be average in comparison to the size of other stars.

Color and Temperature Color reveals clues about the temperature of a star. Color reveals clues about the temperature of a star. Stars have different colors ranging from reds, oranges, and yellows, to blues and whites. Stars have different colors ranging from reds, oranges, and yellows, to blues and whites.

Color and Temperature of Stars Color Temperature ( o C) Red<3,500 Orange 3, ,000 Yellow 5, ,000 Yellow-white 6, ,500 Blue-white 7, ,000 Blue>30,000

Brightness The brightness of a star depends on its size, temperature, and distance from the observer. The brightness of a star depends on its size, temperature, and distance from the observer. The hotter the star, the brighter its color. The hotter the star, the brighter its color. Blue and white stars are the brightest and hottest stars. Blue and white stars are the brightest and hottest stars. Red stars are the dimmest and coolest. Red stars are the dimmest and coolest.

Magnitude Another name for brightness is magnitude. Another name for brightness is magnitude. Two types of magnitude Two types of magnitude 1. Apparent magnitude Depends mainly upon distance Depends mainly upon distance 2. Absolute magnitude Depends upon a stars size and temperature Depends upon a stars size and temperature

H-R Diagram

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