7.9 practice

Front

What is the gravitational force?

Back

The gravitational force is an invisible universal force proposed by Sir Isaac Newton that attracts objects with mass towards each other, keeping planets in orbit around the Sun.

Front

What causes constellations to disappear from the night sky in different seasons?

Back

The revolution of Earth around the Sun causes different constellations to be visible at different times of the year.

Front

Why do planets maintain a constant orbit around the Sun?

Back

The Sun's gravity is the force that controls the planets in their orbital positions.

Front

Which planet has the shortest revolution period around the Sun?

Back

Mercury takes 88 days to complete a single orbit, making it the planet with the shortest revolution.

Front

How does a ride with chains attached to a central point illustrate motions in space?

Back

The ride models how objects in space would continue in a straight line but gravity maintains the object’s revolution around a central point.

Front

What is the role of the Sun in the Solar System?

Back

The Sun provides the gravitational pull that keeps the planets and other objects in orbit around it.

Front

Define revolution in the context of astronomy.

Back

Revolution refers to the movement of an object in an orbit around another object, such as a planet orbiting the Sun.

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 constellation?

Back

A constellation is a group of stars that forms a recognizable pattern in the night sky.

Front

How does Earth's tilt affect the visibility of constellations?

Back

Earth's tilt affects the angle of sunlight and the position of stars, causing different constellations to be visible in different seasons.