Human Population Growth Worksheet Template printable pdf download

Human Population Growth Worksheet Template

Human Population Growth

Name:

Introduction: Darwin’s first two observations in the exposition of Natural Selection involve

population ecology: Populations have the potential to increase exponentially, but usually they

remain constant in size. Both conditions are observed in nature and are associated with the

balance of (births + immigrations) minus (deaths + emigrations).

Key Concepts:

•

Population growth patterns

•

Factors influencing population growth

What’s due at the end of workshop next week:

•

This worksheet and graph with all of the questions answered 10 points

HOW DOES A POPULATION CHANGE?

Population size depends on how many (births + immigrations) minus (deaths + emigrations)

there are. Let’s look at four ways a population can grow.

For the following examples,

N = number of people in the population at any given time

= number of the original population

B = births (number of people joining the population)

D = deaths (number of people leaving the population)

t = time

A. EXAMPLE: The population remains constant over time (EQUILIBRIUM).

Imagine you are having a party in your living area. At the present time (N

), there are ten

people in your room. Every hour one person leaves and one person joins your party. How many

people are in your room three hours after the party started?

A. People in your room.

N(t) = N

+ (B-D)/hr *t

N(3) = 10 + (1-1)/hr *3hrs

N(3) = 10 people

This produces a population growth

curve that is a straight line with no

slope.

(1 point)

time (hours)

1. Use graph A. above to determine

how many people are in the room 5 hours after the party started.

2. Using the equation above, calculate how many are in the room 6 hours after the party

started. Does your calculation agree with the graph?

Human Population Growth Worksheet Template