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Factors impacting population change

Factors impacting population change

Assessment

Presentation

Biology

9th Grade

Practice Problem

Medium

NGSS
MS-LS1-5

Standards-aligned

Created by

Walter HS]

Used 27+ times

FREE Resource

13 Slides • 4 Questions

1

Factors impacting population change

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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




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6

Density independent

Fires

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7

Density independent

Hurricane

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8

Density independent factprs

This are natural distasters, human activities and weathers

9

Density dependent

Parasitism

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10

Competition

Fighting for food and mates

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11

Disease- Plant


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12

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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?

1

the thin, sandy soil

2

the wide temperature range

3

the scarcity of water

4

the spiny cactus leaves

14

Multiple Choice

what does abiotic mean?

1

living things and their products

2

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

1

biotic factors

2

density-independent factor

3

density-dependent factor

4

predation

16

Multiple Choice

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what is the type of population dispersion (distribution) is shown on the diagram?

1

Clumped

2

Random

3

Uniform

17

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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