Checkpoint 3 Review

Front

What is Newton's First Law of Motion?

Back

An object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

Front

What is inertia?

Back

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

Front

What happens to the motion of molecules in a gas as temperature decreases?

Back

The motion of the molecules decreases in speed.

Front

What is the Law of Gravity?

Back

The Law of Gravity states that every mass attracts every other mass in the universe, and the force of attraction is proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

Front

What is an example of Newton's First Law in everyday life?

Back

A passenger not wearing a seatbelt is ejected from an automobile during a severe crash.

Front

What is a comet?

Back

A comet is a celestial object made of ice, dust, and rocky material that, when close to the sun, displays a visible atmosphere or coma and sometimes a tail.

Front

What is a planet?

Back

A planet is a celestial body that orbits a star, is spherical in shape, and has cleared its orbit of other debris.

Front

What is an asteroid?

Back

An asteroid is a small rocky body that orbits the sun, primarily found in the asteroid belt between Mars and Jupiter.

Front

What is the difference between a comet and an asteroid?

Back

Comets are made mostly of ice and dust, while asteroids are primarily made of rock and metal.

Front

What is the role of friction in motion?

Back

Friction is a force that opposes the motion of an object, causing it to slow down or stop.