# What Three Factors Determine The Growth Rate Of A Population

There are a number of factors that determine the growth rate of a population. Here are three of the most important:

1. The birth rate: This is the number of births per 1000 people in the population. The higher the birth rate the faster the population will grow.

2. The death rate: This is the number of deaths per 1000 people in the population. The higher the death rate the slower the population will grow.

3. The migration rate: This is the number of people moving into or out of the population. If more people are moving in than moving out the population will grow. If more people are moving out than moving in the population will shrink.

These are just three of the many factors that can affect population growth. Others include things like the age structure of the population the economy and social factors.

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## What three factors determine the growth rate of a population?

Answer: The three factors that determine the growth rate of a population are food availability predation and disease.

## How does food availability affect population growth?

Answer: If there is more food available the population will grow.

More food means that more individuals can survive and reproduce.

## How does predation affect population growth?

Answer: If there is more predation the population will grow slower.

This is because fewer individuals will survive to reproduce.

## How does disease affect population growth?

Answer: If there is more disease the population will grow slower.

This is because fewer individuals will survive to reproduce.

## What is the carrying capacity?

Answer: The carrying capacity is the maximum number of individuals that an environment can support.

## What happens to the growth rate when a population reaches its carrying capacity?

Answer: The growth rate slows down and levels off.

The population stops growing because there are not enough resources to support more individuals.

## What is an example of a limiting factor?

Answer: A limiting factor is anything that limits the growth of a population.

Examples include food availability predation and disease.

## What happens when a limiting factor is removed?

Answer: When a limiting factor is removed the population will usually grow.

This is because there are now more resources available to support more individuals.

## What is an example of a density-dependent factor?

Answer: A density-dependent factor is a factor that depends on the density of the population.

An example is disease which spreads more easily in a dense population.

## What happens when a density-dependent factor is removed?

Answer: When a density-dependent factor is removed the population will usually grow.

This is because the individuals are no longer being limited by this factor.

## What is an example of a density-independent factor?

Answer: A density-independent factor is a factor that is not affected by the density of the population.

An example is a natural disaster which can kill many individuals regardless of the population density.

## What happens when a density-independent factor is removed?

Answer: When a density-independent factor is removed the population will usually grow.

This is because the individuals are no longer being limited by this factor.

## What is an example of a positive feedback loop?

Answer: A positive feedback loop is when a change in a population leads to an even greater change in that population.

An example is a population of rabbits.

As the population of rabbits increases there is more food available.

This leads to even more rabbits and the population continues to grow.

## What is an example of a negative feedback loop?

Answer: A negative feedback loop is when a change in a population leads to a lessening of that change.

An example is a population of deer.

As the population of deer increases there is less food available.

This leads to fewer deer and the population starts to decrease.

## What is the difference between exponential growth and logistic growth?

Answer: Exponential growth is when the population is growing at a constant rate.

Logistic growth is when the population is growing at a decreasing rate.