Why is it hard to build a perfect scale model of our solar system?

The ________________ of the Sun causes the orbital motions of the objects in the solar system.

The sun is the anchor point of our solar system because of

Which is needed to determine the amount of gravitational force between two objects?

What are the four outer planets?

What are the terrestrial (inner) planets

All the space and the matter space contains

A(n) _____ is the curved path of an object around a point/object in space.

How would you describe the orbits?

Why does Mercury have the shortest year of all the planets?

What is a large round object in space that follows a path around the sun called?

What is it called when an object spins on a center point?

What is a large piece of rock or metal flying through space called?

What is a giant ball of light made of hot gas called?

A planet has twice the mass of Earth and the same radius as Earth. If you were standing on this planet, the force of gravity would be…

Anything with ____________ also has a gravitational pull.

Which of these statements are true about the outer planets?

What does this picture represent?

Which of the 8 planets in our Solar System is farthest away from the Sun?

Pluto is considered what?

How can you tell the difference between moons and planets?

Which is the largest planet in our solar system

What is happening to the ORBITS of our planets

What is the hottest planet

How many planets are in our solar system (not including pluto)

Earth revolves around the sun, but it also makes one complete rotation. How long does it take Earth to make one complete rotation on its axis?

Polaris is also known as the...

How long does it take earth to revolve around the sun?

How long does it take earth to rotate?

The asteroid belt is located:

Which of the following are in our solar system?(pick more than one answer)

What are the characteristics of the inner planets in the solar system?

What are the characteristics of the outer planets in the solar system?

How can you tell the difference between moons and planets?

Astronomers use the light-year to describe the relationship between objects in space. Which of the following units is most similar to the light-year?

A scientist finds a star that is located far from Earth. The star appears to have several smaller bodies orbiting it. The scientist draws a simple diagram of her findings. Which of these terms would the scientist use to describe her findings?

The pie graph shows the elements that make up the sun by percentages of mass. Which element makes up most of the sun’s mass?

For a school project, Kate is building a model of the solar system. In her model, Kate uses a tiny bead to represent Earth and a giant beach ball to represent the sun. Why did Kate choose a tiny bead to represent Earth and a giant beach ball to represent the sun in her model?

Galaxies are large groups of millions, billions, or even trillions of stars. What would you claim keeps the stars in a galaxy from moving away from each other?

Our solar system consists of eight planets. Which phrase correctly describes a planet?

Celestial bodies can be classified based on their sizes. Which of the following is the smallest?

The diagram shows a crust, mantle, and core. What is shown in the diagram.

Which planet is similar in size and mass to Earth?

As the distance of the planets increase away from the sun, their measurement in astronomical units does what?

Which list has the planets in correct order by their distance from the sun?

What causes day and night on Earth?

Why does the sun seem so much larger than other stars?

The Sun is a planet.

These are the four planets FARTHEST from the Sun; Jupiter, Saturn, Uranus, and Neptune.

_________ are stationary.

How many planets are there in our Solar System?

________________orbit around a star.

The outer planets are mostly made of ___________________.

Stars are mostly made of

The system consisting of the sun and the planets and other objects that revolve around it.

To examine methodically and in detail the constitution or structure of (something, especially information), typically for purposes of explanation and interpretation.

A unit of distance equal to the average distance between Earth and the sun, about 150 million kilometers.

A huge group of single stars, star systems, star clusters, dust, and gas bound together by gravity.

A large, gaseous body at the center of the solar system.

a straight line passing from side to side through the center of a body or figure, especially a circle or sphere.

An object that orbits a star, is large enough to have become rounded by its own gravity, and has cleared the area of its orbit.

The movement of an object around another object.

A natural satellite that orbits a planet.

The spinning motion of a planet on its axis.

One of the rocky objects revolving around the sun that is too small and numerous to be considered a planet.

An optical instrument that forms enlarged images of distant objects.

A chunk of rock or dust in space, generally smaller than an asteroid.

The distance between two corresponding parts of a wave, such as the distance between two crests.

A loose collection of ice and dust that orbits the sun, typically in a long, narrow orbit.

The range of wavelengths of electromagnetic waves.

All of space and everything in it.

Electromagnetic radiation that can be seen with the unaided eye.

The distance that light travels in one year; about 9.46 trillion kilometers.

The energy transferred through space by electromagnetic waves.

The initial explosion that resulted in the formation and expansion of the universe.

The two factors that combine to keep Earth and the moon

in their orbits are

The tendency of a moving object to continue moving in

a straight line or a stationary object to remain in place is

All objects are attracted to each other by the force of

The strength of the force of gravity between two objects

depends on

If the distance between two objects increases, the gravitational force between them will

In the metric system, the force of gravity (and all forces including weight) is measured in

The gravitational force of Earth pulls all objects

Mass and weight are different because

The acceleration due to Earth’s gravity is

If an object has a mass of 1500 kg, what will its estimated weight be on Earth

the measure of the force of a planet acting on an object

the pulling force of attraction of every object on every other object

the tendency of an object to resist a change in its motion

As the mass of an object increases, what happens to the gravitational attraction between it and another object?

Why do astronauts weigh more on Earth than on the moon?

At 10:18, a rocket is launched from Earth’s surface. At 10:29, the rocket exits Earth’s atmosphere. What is happening to the rocket’s weight during these 11 minutes?

The estimated weight of a 50-kg object is

Which image correctly shows why Earth orbits the Sun?

(Note: I = inertia and G = gravity)

Imagine a large meteorite collided and merged with a planet, significantly increasing the planet’s mass. What will happen to its gravitational pull with the sun?