8th Grade Week 18 review
Hydrogen Calcium Magnesium Based on this star’s spectra, which of these elements is it burning? Hydrogen Calcium Magnesium
Name each moon phase at each letter: K= J= Third quarter New moon First quarter Full moon
This means that when the moon is in its first quarter and third quarter phases - High tides are at their lowest level
What is the correct order of phases Wax crescent, first quarter, wax gib, full Waning gibbous, third quarter, waning crescent, new
What phase will we see one month later? Full moon again!
What season is the Southern hemisphere? L=Summer J= winter
F Which best represents the characteristics of bodies and systems in the universe?
What do we call EVERYTHING that is out there in space? The Universe!
What shape galaxy is this: Irregular Galaxy
The moon revolving around the Earth What causes us to see the moon go through phases? The moon revolving around the Earth
Which type of lightwave has the LOWEST frequency? Radio!
Which type of star is at 10,000 solar units 3,000K? giant
Which star color is the HOTTEST? Blue
Where is Sol in our Galaxy? Near the outer edge of one of the arms
Which type of tide is happening in this diagram, and what could you expect the ocean to do? Neap Tide- hardly and difference between high/low because the sun cancels out the moon’s tides.
The Whirlpool Galaxy is a: Spiral
What causes seasons? Earth REVOLVING Around the SUN
A lightyear is how many kilometers? 9.5 trillion km.
How far away is the next closest star to Sol? Proxima Centauri is 4.2 light years away (about 40 trillion kilometers!)
What is the closest star to Earth? Our sun, Sol!
Why is the equator hotter than the poles? Because it sticks out closer to the sun and is never tilted away.
Distance And size of space Astronomers can use light years to determine the - Distance And size of space
What type of galaxy is: Spiral Galaxy
Which type of Lightwave has the SHORTEST wavelength? Gamma
Bigger = Brighter = Hotter How is brightness, temperature, and size related for Main Sequence stars? Bigger = Brighter = Hotter
Centaurus-A is a: Elliptical Galaxy
What is a galaxy? A collection of billions of stars!
Which type of Lightwave has the LONGEST wavelength? Radio
What is the name of our Galaxy? The Milky Way
The Big Bang Theory What is the most popular explanation for why the galaxies are spreading farther apart? The Big Bang Theory
Bigger, Hotter, or CLOSER to us Name 3 things that would make a star look BRIGHTER to us here on Earth. Bigger, Hotter, or CLOSER to us
The center is a sun, with planets around the outside. When a new star system is formed, what is the center, and what is around the outside? The center is a sun, with planets around the outside.
Which type of Lightwave has the HIGHEST frequency? Gamma
What is a Lightyear? The distance light travels in one year