A constant rate is a rate that does not change over time. It is a measure of how quickly something happens that is unaffected by outside factors. The term is most often used in the sciences particularly physics and chemistry. In physics a constant rate is typically used to describe the speed of an object or the rate at which a chemical reaction occurs. In chemistry the term is used to describe the rate at which a substance dissolves in another substance.

## What is a constant rate?

A constant rate is a rate that remains the same over time.

## What is the rate of a car when it is going 20 miles per hour?

The rate of the car is 20 miles per hour.

## What is the rate of a person when they are walking 2 miles per hour?

The rate of the person is 2 miles per hour.

## Is the rate of a person walking 2 miles per hour a constant rate?

Yes the rate of a person walking 2 miles per hour is a constant rate.

## Is the rate of a car going 20 miles per hour a constant rate?

No the rate of a car going 20 miles per hour is not a constant rate.

## Why is the rate of a car not a constant rate?

The rate of a car is not a constant rate because the car’s speed changes over time.

## How can the rate of a car change?

The rate of a car can change if the car’s speed changes.

## If the rate of a car is changing is the car’s speed also changing?

Yes if the rate of a car is changing the car’s speed is also changing.

## Why does the rate of a car change?

The rate of a car changes because the car’s speed changes.

## How can the speed of a car change?

The speed of a car can change if the car slows down or speeds up.

## If the speed of a car changes does the rate of the car also change?

Yes if the speed of a car changes the rate of the car also changes.

## What is the rate of a car if the car is speeding up?

The rate of the car is increasing.

## What is the rate of a car if the car is slowing down?

The rate of the car is decreasing.

## Is the rate of a car always changing?

No the rate of a car is not always changing.

## Why is the rate of a car not always changing?

The rate of a car is not always changing because the car’s speed does not always change.