

Factors impacting population change
Presentation
•
Biology
•
9th Grade
•
Practice Problem
•
Medium
Standards-aligned
Walter HS]
Used 27+ times
FREE Resource
13 Slides • 4 Questions
1
Factors impacting population change

2
Learning objectives
Students will differentiate between biotic and abiotic factors
Students will learn about population distribution
Students will learn about the factors that impact population
3
Terms
Density independent factors- things that happens regardless of population size- a. weather, b. natural disasters- tornadoes, hurricanes, fires. c. Human activities- hunting, deforestation
Density dependent factors- This are factors that impact a population because of its size. Ex. Disease, competition, parasitism, predation
4
Abiotic and Biotic factors
Abiotic-Non living ex. sunlight, water, sand, rocks, air
Biotic- Living things. Ex. Plants, you, insects, lizards, coyotes, bacteria etcetera
5
Density independent
Tornadoes
6
Density independent
Fires
7
Density independent
Hurricane
8
Density independent factprs
This are natural distasters, human activities and weathers
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Density dependent
Parasitism
10
Competition
Fighting for food and mates
11
Disease- Plant
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13
Multiple Choice
In many desert ecosystems, days are hot and nights are cold. Water is scarce, so animals seek water wherever possible. The spines of a cactus are actually leaves adapted to conserve water. The cactus plants have also adapted to live in thin, sandy soil. Which of the following is a biotic component of a desert ecosystem?
the thin, sandy soil
the wide temperature range
the scarcity of water
the spiny cactus leaves
14
Multiple Choice
what does abiotic mean?
living things and their products
non-living
15
Multiple Choice
Any factor in the environment that does not depend on the number of members in a population per unit area
biotic factors
density-independent factor
density-dependent factor
predation
16
Multiple Choice
what is the type of population dispersion (distribution) is shown on the diagram?
Clumped
Random
Uniform
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Review
We covered biotic and abiotic factors, population distribution and looked at different factors that affect population distribution
Complete 2.2 & 2.3 Learn on canvas due Friday 9/25/2020
Factors impacting population change

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