Intro to Space Systems Exploration Pretest

Front

What happens to gravity as the distance between two objects increases?

Back

Gravity decreases as the distance between two objects increases.

Front

How far is the Earth from the Sun at a scale of 20 feet?

Back

The Earth is 20 feet away from the Sun at this scale.

Front

What is the term for the Earth's spinning on its axis?

Back

Rotation.

Front

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

Back

Gravity and inertia.

Front

Which model is best to show the strength of gravity on some planets?

Back

Data Table Model.

Front

What is the definition of revolution in the context of space systems?

Back

Revolution is the movement of one object around another, such as the Earth orbiting the Sun.

Front

What is inertia?

Back

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

Front

What is the difference between rotation and revolution?

Back

Rotation is the spinning of an object around its own axis, while revolution is the movement of an object around another object.

Front

What is a scale model?

Back

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

Front

What are Kepler's Laws?

Back

Kepler's Laws describe the motion of planets around the Sun, including their elliptical orbits.