The spinning of an object on its axis is called (a)   .

Day and night is caused by the (a)   of earth on its axis.

The sun is an example of a (a)   .

(a)   is at the center of our solar system.

As the distance between 2 objects increases, the gravitational force (a)   .

The motion of a planet spinning (producing day and night) is called (a)   .

It takes the Earth (a)   to make one REVOLUTION around the Sun.

Planet Earth’s only natural satellite is called (a)   .

Scientifically speaking, a nebula is (a)   .

(a)   determines the seasons on Earth.

(a)   is about the same size as Earth.

​ (a)   ​ and ​ Venus ​ are the two planets that have zero moons.​

(a)   is the main source of heat for earth and other planets.

(a)   is the last planet in our solar system. All of the gas giants have rapid winds and large storms, but this planet has the fastest winds in our solar system. Sometimes the winds reach 2000 kilometers per hour; that's over 1240 miles per hour!

(a)   is the seventh of the eight planets. It is an ice giant and rotates on its side.

(a)   is a giant, gaseous planet. You can see the huge storm, called the Great Red Spot, which has been raging for at least 400 years.

(a)   is the only planet in the solar system with known life.

(a)   has a very thick atmosphere that traps heat and increases the air pressure. It can get as hot as 900 degrees Fahrenheit.

(a)   is the closest planet to the sun. There is no atmosphere on this planet, so there is a huge range of temperatures.

(a)   refers to an object's spinning motion about its own axis.

(a)   refers to the object's orbital motion around another object.

(a)   tide causes the biggest change in ocean levels.

Which type of eclipse is being modeled? (a)  

Olympus Mons, the largest mountain in the solar system, is located on (a)   .

Earth and Venus are alike because (a)   .

(a)   is when sunlight shines equally on the northern and southern hemispheres.

(a)   is when the area of sunlight is at a maximum in one hemisphere and a minimum in the other hemisphere.

Less massive stars turn into (a)   when they die.

(a)   is the longest day of the year.

The Equator is the warmest (a)   .

Generally, any beach location will have ​ (a)   each day.​

Spring tides occur (a)   .

The tide in the picture is a ​ (a)   .

During this tide, the high/low tides will be ​ (b)   than usual.

The tide in this picture is a ​ (a)   .

During this tide, the high/low tides will be ​ (b)   than usual.

It takes (a)   for energy to escape the Sun's radiative zone.

In many parts of the world, it is cold in the winter and hot in the summer. But what causes these seasonal changes? The answer lies in the ​ (a)   of the Earth’s axis and Earth’s constant ​ (b)   around the sun.

The imaginary line that runs through the center of the Earth is called its ​ (c)   . This is the line around which the Earth ​ (d)   , making one complete turn every day. But this line does not run straight up and down. Instead, it’s tilted at about ​ (e)   degrees. This tilt is crucial in creating seasonal change. It means that while half the Earth is pointed at the sun, the other half is pointed away.

The sun rises in the ​ (a)   and sets in the ​ (b)   .

What phase is the moon when it is at position 1? (a)  

What phase is the moon when it is at position 5? (a)  

The Moon orbits Earth in a (a)   direction.

Gravity can be defined as the (a)   .

(a)   is the largest object in our solar system.