Night and day, the seasons, and different time zones happen because

The seasons are opposite from each other in the Northern and Southern Hemispheres.

What do scientists use to explore space?

The seasons are caused by Earth's

What is the time difference between adjacent time zones?

What gives us night and day?

How long does it take Earth to make one complete rotation?

True or False: Rotation and Revolution are the same thing.

A scientist who studies the universe is a(n)

Everything that exists, including Earth, the planets, the stars, and all of space.

Astronomy is the study of

A device that collects light and magnifies images to make distant objects appear closer and larger.

One complete spin of an object, such as Earth on its axis

A vertical belt about 15 degrees wide in longitude, in which all places have the same time.

One complete trip of an object orbiting another object such as Earth orbiting the sun.

The 180 degree line of longitude; going West across this line adds one day to the date and going East subtracts a day.

Sometimes the way the Sun, Earth, and the Moon line up causes tides to be especially strong or weak.

Our concept of a month comes from the length of the cycle of phases of the Moon which lasts about how many days?

True or False: Half the moon is always dark.

Large, dark, flat surfaces on the Moon that are smooth in appearance and dark in color.

True or False: The Athena Space Missions helped astronauts to land on the Moon and to explore it.

True or False: Tides are the twice-daily rise and fall of the water level along a shore, caused by the gravity of the Moon and the Sun.

The force of attraction among all objects

True or False - The Moon actually changes its shape each night.

In this phase, after a Full Moon, the lit side of the moon becomes less and less visible.

In this phase, after a New Moon, the lit side of the moon becomes more and more visible.

A blocking of the Sun's light that happens when Earth passes through the Moon's shadow.

When the Earth, Sun and Moon are in a straight line and Earth's shadow falls across the Moon.

A depression in the Moon's surface formed by the impact of objects from space.

What happens as the Moon moves around Earth? (check all that apply)

The amount of the Moon's lighted side that can be viewed from Earth's surface at a given time is the

What caused the craters on the moon?

The moon looks completely dark from Earth during a

Which of the following is NOT a feature of the Moon?

True or False- High tide and low tide each occur 4 times a day.

True or False - Lunar eclipses and solar eclipses can happen on the same day.

A star such as the Sun and the planets and other bodies that travel around it is the

Any part of a meteoroid that reaches Earth's surface

A rocky or metallic object that orbits the Sun

A meteoroid that enters Earth's atmosphere and burns with a streak of light

A sphere of ice and rock that orbits the Sun

A small, rocky object that orbits the Sun in the inner and outer regions of the solar system

A large body that orbits a star is known as a

Any large, natural object that orbits a planet is called a

The tendency of a moving object to stay in motion at the same speed and in the same direction is

True or False - Inertia and gravity are the same thing

True or False - There is no difference between a meteoroid and a meteor

The four inner planets are

The four outer planets are

What are the components of our solar system?

What kind of star is the Sun?

As a star increases in size, the surface becomes ______ and its color _______

The sun will one day become a

If a star is very massive, what are the 2 possible final stages of life it could have? (check the 2 correct answers)

What are the characteristics of stars? (check all that apply)

True or False - A light-year is the distance sound travels in a year.

True or False - The temperature of the sun is hotter than a red giant.

A light-year is the

An exploded supergiant star is a

An object with gravity so strong that even light cannot escape from it is a

A huge cloud of gas and dust in space is a

A large, hot ball of gases that gives off its own light and is held together by gravity is a

A group of stars that appear to form a pattern

True or false - Every star begins as a nebula.

The apparent shift in an object's position when viewed from two locations

A group of star clusters held together gravity is a

What is a band of colors made when white light is broken up?

True or False: Background radiation is the radiation that is left over from the beginning of the universe and is coming from all directions in space.

What are the 3 different types of galaxies? (Check the 3 correct answers)

The beginning moment when the universe was very hot and dense, resulting in a tremendous "explosion" is called the

The absorption lines that result in longer (redder) wavelengths from galaxies moving away from each other as space expands.

A spectrum is

Radiation that is left over from the beginning moments of the universe and is coming from all directions in space

True or False: The beginning moment when the universe was very hot and dense, resulting in a tiny poof of smoke was called the Little Bang.

True or False: The galaxy we live in is called the Andromeda Galaxy.

Galaxies are held together by

Which of the following is NOT a galaxy shape?

Ever since the big bang, the universe has been

What do we know about our expanding universe? (check all that apply)

A __________ galaxy is a galaxy that nearly collides with another and has an intense period of star formation.