Our Solar System warm up

What is the definition of a planet?

• A celestial body that emits its own light.

• An object that orbits a star, is large enough to be nearly spherical in shape, and has no other large object in its orbital path.

• A small rocky body orbiting the Sun.

• A body that revolves around a planet.

Which term describes the path an object follows as it moves around another object?

• Gravity

• Orbit

• Inertia

• Momentum

Tags

NGSS.MS-ESS1-1

What is the measure of how far an object’s orbit is from being circular?

• Eccentricity

• Ellipse

• Gravity

• Period of Revolution

If a planet has a high eccentricity, what can be inferred about its orbit?

• The orbit is nearly circular.

• The orbit is a perfect circle.

• The orbit is more elongated.

• The orbit is stationary.

Which force is responsible for keeping the planets in orbit around the Sun?

• Inertia

• Momentum

• Gravity

• Eccentricity

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

How does inertia affect a moving object in space?

• It causes the object to stop.

• It changes the object's direction.

• It resists changes to the object's direction and speed.

• It increases the object's speed.

What is the period of revolution?

• The time it takes an object to complete one rotation.

• The time it takes an object to travel once around the Sun.

• The time it takes for a planet to form.

• The time it takes for a star to collapse.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

If a planet has a short period of rotation, what can be inferred about its day length?

• The day is longer.

• The day is shorter.

• The day length is unaffected.

• The day is the same as the period of revolution.

What shape is an ellipse?

• A perfect circle

• A square

• A stretched out circle

• A triangle

How does momentum relate to stopping a moving object?

• It makes it easier to stop the object.

• It has no effect on stopping the object.

• It measures how hard it is to stop the object.

• It stops the object immediately.

Tags

NGSS.HS-PS2-2