A student’s model of the solar system is shown here. Which of these objects would most likely be found between Mars and Jupiter?

Pluto was once called a planet. In 2006 it was reclassified with other nearly round bodies whose orbits cross the orbits of other bodies. Which of the terms describes Pluto?

During a visit to an observatory, Silvano observed the moon, Venus, the sun, and the star Sirius. Which of these objects is outside of the solar system?

The figure shows the eight planets in our solar system. Which of the following planets has a large solid core?

Elliptical galaxies are brightest toward the center. Which of these statements best explains this observation?

Some galaxies have symmetrical shapes. Other galaxies look jumbled. What term do astronomers use to describe a galaxy such as the one shown in the illustration?

All visible stars in the night sky are many times larger than Earth. Why do they look like tiny points of light?

There are two types of spiral galaxies. What is the difference between a barred spiral galaxy and a normal spiral galaxy?

What is an orbit?

What does a solar system contain?

The diagram shows the path of Earth’s movement. About how long does it take for Earth to move from point Y—its current location—to point Z?

The outer planets are the four farthest from the sun. Which characteristic do all four outer planets share?

Daniel wants to make a cross-section model of an inner planet. Which characteristic should it have?

The diagram shows planet Earth in different positions relative to the sun. Labels G, H, J, and K are different locations on Earth’s surface. According to the diagram, which of the following correctly states the season for the given location?

The movements of Earth, the sun, and the moon can be shown with simple diagrams. For example, look closely at the diagram. Which letter represents the motion that takes about 27 days?

Most places on Earth have warmer summers and cooler winters. Which of the following is a major cause of the warmer temperatures in a particular part of Earth during summer?

A student draws a model of Earth and the moon. He wants to make the sizes accurate comparisons. If his drawing of Earth is 4 cm in diameter, what size should he draw the moon?

Which of the following has no atmosphere?

The study of objects in space and their properties.

Everything that exists including galaxies and everything in them.

It takes Earth 24 hours to __________ once on its axis.

A huge ball of very hot, glowing gases in space that can produce its own heat and light is called a what?

Together a star and all the planets and other objects orbiting it form a what?

A group of solar systems held together by gravity and classified by shape is called a what?

An object that moves around a star, has a nearly round shape, and has cleared its path of most debris is called ?

The path Earth takes around the Sun is known as ?

A chunk of rock or iron that is less than 1,000 km in diameter and that orbits the sun is called ?

This object orbits the Sun in very long periods of time. Sometimes is referred to as a dirty snowball, and usually has a tail pointing away from the Sun.

To go around; It takes Earth 1 year to do this around the sun.