ESS 8.1 Human Population Dynamics

It is difficult to suggest if there are too many humans on the planet because....

• We will never reach our carrying capacity

• There will always be people that die

• Humans are able to manipulate their environment

Tags

NGSS.HS-LS2-6

What is meant by the term demographics?

• The study of the dynamics of population change

• The study of whether populations will reach their carrying capacity

• The study of how many humans there are

Tags

NGSS.HS-LS4-5

When a population follows an accelerating rate of growth proportional to the population size this is known as an.....

• Expedicious curve

• Exponential curve

• Exceptional curve

Population predictions are based on past and current trends. What factors may lead to a decrease in population?

• A population with a low birth rate to death rate ratio

• An ageing population with fewer of child bearing years

• A population with a high crude birth rate and low crude death rate

Tags

NGSS.HS-LS2-6

The red line (top) suggests what is happening?

• Assumes CDR will continue to fall rapidly but the CBR will continue to fall slowly

• Straightforward projection of the curve

• Assumes no cure will be found for any of the big killers and CBR will fall

Tags

NGSS.HS-ESS3-1

The green line (bottom) shows what?

• Assumes that CDR will continue to fall rapidly but the CBR will continue to fall slowly.

• Assumes we will not find a cure for the big killers and that CBR will fall

• Straightforward projection of the curve

What is crude birth rate?

• The number of births in a population per year

• The number of births per hundred individuals in a population per year

• The number of births per thousand individuals in a population per year

What is crude death rate

• The number of deaths per thousand in a population per year

• The number of deaths per million in a population per year

• The number of deaths in a population per year

How do you calculate crude death rate?

• Population size/number of deaths x 1000

• Number of death/population size x 100

• Number of deaths/population size x 1000

What is natural increase rate?

• The number of deaths expressed as a percentage change per year

• The rate of human growth expressed as a percentage change per year

• The rate of human growth expressed as a percentage