Warm-Up #31 What are asteroids Warm-Up #31 What are asteroids? Where are most asteroids in our solar system located? What else are asteroids known as? Asteroids are small, rocky worlds. Most asteroids revolve around the sun between the orbits of Mars and Jupiter. Asteroids are also known as planetoids. (Answer: 50,000 x 5.1 = 255,000 squares)

WARM-UP # 32 Which planets are the terrestrial planets and which planets are the gas planets? What are three of their primary differences? The terrestrial planets are made of rock, smaller, closer together, do not have rings, and are closer to the sun. The gas giants are made of gas, huge, farther apart, all have rings, and are farther from the sun. Outer Planets Outer planets

Why isn’t Pluto a planet anymore? What makes it a dwarf planet? Outer Planets WARM-UP # 33 Why isn’t Pluto a planet anymore? What makes it a dwarf planet? Outer planets Pluto does not clear its orbit. There are many space objects in Pluto’s orbit.

A light year is the distance that light travels in one year. Outer Planets Outer planets WARM-UP # 34 What is a light year? A light year is the distance that light travels in one year.

WARM-UP # 35 A – How many asteroids are in the asteroid belt? Outer Planets Outer planets WARM-UP # 35 A – How many asteroids are in the asteroid belt? Over 1 million B – Why does Mars have seasons? Tilt and revolution

Outer Planets Outer planets WARM-UP # 36 What is a star? A star is a large, hot ball of gas which is held together by its own gravity and gives off its own light.

What is the asteroid belt from? Outer Planets Outer planets Warm-UP #37 What is the asteroid belt from? The remains of a 5th terrestrial planet

The magnitude of a star is the BRIGHTNESS. Outer Planets Outer planets WARM-UP # 38 What is the magnitude of a star? What is the difference between apparent magnitude and absolute magnitude? The magnitude of a star is the BRIGHTNESS. ABSOLUTE – actual brightness APPARENT – how bright is appears

Cool stars are red Hot stars are blue. WARM-UP #39 What colors are the coolest stars? What color are the hottest stars? Cool stars are red Hot stars are blue.

WARM-Up 40 What is an H-R diagram? An H-R diagram compares the temperatures and absolute magnitudes (brightness) of stars.

Warm-Up # 41 What is a main sequence star Warm-Up # 41 What is a main sequence star? What is an example of a main sequence star? A main sequence star is a star fusing hydrogen into helium. It is very stable and considered an “adult” star.

Warm-Up # 42 You are in East Hanover Warm-Up # 42 You are in East Hanover. The sun rises at 5:42AM and sets at 8:44PM. What season is this? Why is it this season? It is summer. The Earth is tilted toward the sun so Earth is receiving more direct sunlight and the days are longer.

WARM-Up # 43 What do you call it when a star’s core continues to shrink and the surface heats up? What is the name of this hot and dense core of a star? WHITE DWARF

WARM-Up # 44 What is another name for a black hole WARM-Up # 44 What is another name for a black hole? What is the name for death by black hole? A black hole is also known as a singularity. Spaghettification is death by black hole.

What holds all of the planets in place in our solar system and why? WARM-UP # 45 What holds all of the planets in place in our solar system and why? The planets are held in place by the Sun's gravity. The Sun is the largest object in the solar system, its gravitational force extends far out into the solar system.