Intro to Space Systems Exploration Pretest

Front

What is mass?

Back

Mass is the amount of matter in an object, which does not change regardless of the gravitational field.

Front

What causes the moon to have phases?

Back

The phases of the moon are caused by the moon's rotation and revolution around the Earth.

Front

What two forces keep the planets in their orbits around the sun?

Back

Gravity and inertia are the two forces that keep planets in their orbits around the sun.

Front

What is gravity?

Back

Gravity is a force that attracts two bodies towards each other, depending on their masses and the distance between them.

Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion.

Front

What is a gravitational field?

Back

A gravitational field is a region of space around a mass where other masses experience a force of attraction.

Front

How does distance affect gravitational attraction?

Back

Gravitational attraction decreases as the distance between two objects increases.

Front

What is the role of the sun in the solar system?

Back

The sun's gravity keeps the planets, including Earth, in orbit around it.

Front

What is a scale model?

Back

A scale model is a physical representation of an object that maintains accurate relationships between its dimensions.

Front

What is an interactive model?

Back

An interactive model allows users to manipulate variables and see the effects in real-time.