Gravity and Orbits

Front

What is gravity?

Back

Gravity is a force that attracts two bodies toward each other, such as the Earth and the objects on it.

Front

What is the relationship between a planet's distance from the sun and its orbital speed?

Back

The closer a planet is to the sun, the faster it orbits.

Front

What happens to Earth if its forward motion stops?

Back

Earth would move toward the Sun and eventually crash into it.

Front

What unit of measurement is used to measure mass?

Back

Kilograms (kg) and grams (g) are used to measure mass.

Front

What force holds all of the planets in orbit around the sun?

Back

Gravity holds all of the planets in orbit around the sun.

Front

What is caused by Earth's revolution around the sun?

Back

We observe different star patterns in different seasons.

Front

What is an orbit?

Back

An orbit is the curved path of an object around a star, planet, or moon.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force of gravity acting on that mass.

Front

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

Back

The sun is the central star that provides light and heat, and its gravity keeps the planets in orbit.

Front

What is inertia?

Back

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