Unit 6: Tides, Stars and Galaxies

Tides

100

Draw and label what a SPRING TIDE looks like.

Sun --> Moon --> Earth

or

Sun --> Earth --> Moon

**they are in a STRAIGHT line**

200

How often do the tides change? 

Every 12.5 hours

300

What are the 2 forces that cause the tides?

Moon and Sun's gravity

400

Draw and label what a NEAP TIDE looks like.

            Moon

Sun --> Earth

or 

Sun --> Earth 

             Moon

**They form a RIGHT angle**

500

True or False: The side of the Earth facing TOWARD the Moon will experience a low tide? 

False - It will experience a high tide because the Moon's gravity pulls on the surface of the Earth that faces towards it. 

Sky, Stars and Sun

100

What is the name of the tool that scientists can use to see a stars spectra?

Spectroscope

200

Fill in the Blank: Stars with a __________ mass have a shorter lifespan and starts with a __________ mass have a longer lifespan.

bigger

smaller

300

Stars start from a ball of gas and dust inside of a ________. 

nebula

400

In order for a star to become a star, they need to go through _______________________ which is where atoms slam into one another to make larger ones and release energy in the form of light. 

Nuclear Fusion

500

What is the name of the graph that compares a stars temperature vs. its luminosity?

Hertzsprung-Russel Diagram or HR Diagram

Sky, Stars and Sun (Part 2)

100

What are the three interior layers of the Sun (and almost every other star)?

Core

Radiative Zone

Convection Zone

200

True or False: The Sun is the only star in our Solar System. 

True

300

What are the three exterior layers of the Sun (and almost every other star)?

Chromosphere

Phototsphere

Corona

400

Stars can be classified in three ways.  What are they? 

Color

Mass

Temperature

500

What are the two units of measurement that scientists use to measure distance in space (both WITHIN and BEYOND our solar system)

Astronomical Units and Light-Years

Galaxies and Universe

100

What are the 3 types of galaxies? 

Spiral

Elliptical

Irregular

200

Fill in the Blank: The ___________ contains hundreds of billions of galaxies which can contain hundreds of billions of stars. 

universe

300

This is the theory that the universe began from one point billions of years ago and has been expanding ever since. 

Big Bang Theory

400

How old do scientists believe the universe is? 

13-14 billion years old. 

500

Put the following in order from largest to smallest. 

Universe, Planet, Galaxy, Solar System

Universe, Galaxy, Solar System, Planet

Random

100

What is the name of the galaxy our solar system is in?

The Milkyway Galaxy

200

________ are the daily rise and fall of the sea level. 

Tides

300

What is the definition of luminosity?

The true brightness of a star. 

400

What is a stars "happy place" called on the Hertzsprung-Russell Diagram? 

Main Sequence

500

What are the two ways that a stars brightness can be measured? 

Apparent Magnitude and Absolute Magnitude