Question

name
① read pages 749 - 752.
content practice a
lesson 2
changing populations
directions: on each line, write the term from the word bank that correctly completes each sentence. each term is used only once.
birthrate
carrying capacity
death rate
decrease
endangered species
exponential growth
extinct species
increases
migration
movement
threatened species

1. the number of offspring produced over a given time period is a population’s

; the number of individuals that die over that time is
its
.

1. if the birthrate is higher than the death rate, the population

in size.

1. a population grows in a pattern called

when it is in ideal
conditions with abundant resources.

1. lack of food, natural disasters, disease, and predation are reasons why a population

might
in size.

Explanation:

1. The first blank is about the number of offspring (birth - related), so "birthrate" fits. The second blank is about the number of deaths, so "death rate" is correct.
2. When birthrate > death rate, population size goes up, so "increases" is appropriate.
3. Ideal conditions with abundant resources lead to "exponential growth" (a known population - growth pattern).
4. Lack of food etc. cause population size to go down, so "decrease" is the right term.

Answer:

1. birthrate; death rate
2. increases
3. exponential growth
4. decrease