Chapter 5

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object and remains constant, while weight is the force of gravity acting on an object and can change depending on location.

Front

What unit is mass measured in?

Back

Kilograms (kg)

Front

What unit is weight measured in?

Back

Newtons (N)

Front

What is a force?

Back

A force is a push or pull that can change an object’s motion, shape, or direction.

Front

What are balanced forces?

Back

Balanced forces are equal in size and opposite in direction, causing no change in motion.

Front

What happens when unbalanced forces act on an object?

Back

The object will change its motion (speed up, slow down, or change direction).

Front

What is upthrust?

Back

Upthrust is the upward force exerted by a fluid on an object, helping it float.

Front

Why do objects sink or float?

Back

Objects float if their density is less than the liquid they are in; they sink if their density is greater.

Front

What is an electric circuit?

Back

A closed path through which electric current flows.

Front

Name two types of electric circuits.

Back

Series circuit and parallel circuit.