Twin's paradox experiment is a meassurement of the extra dimensions.pptx
Lecture density
1. The density of a population is the
number of individuals per unit area
or volume: the number of oak
trees per square kilometer in the
Minnesota country or the number
of Escherichia coli bacteria per
milliliter in a test tube.
2. Population regulation is an area of ecology
that has many practical applications. Farmers
may want to reduce the abundance of insect
pests or stop the growth of an invasive weed
that is spreading rapidly.
3.
4. Factors affecting the size of population are ,
emigration, immigration, birth rate and death
rate.
Limiting factors—anything that limits the size of
a population like certain environmental
conditions, keeps a population from increasing
in size and help balance an ecosystem
Carrying Capacity—the maximum population
size an environment can support
7. Guide Questions:
1. Compare the distribution patterns of the three
populations.
2. Which population has the greatest density?
3. Infer from recorded data from the possible causes for
the differences in the population density.
4. What conditions could change the density of any of
the population.
5. Describe how a population’s density can be used to
learn about the needs and characteristics of that
population.
8. . The Bermuda grass population is the
largest then the lily population. The
clover population has the least
number
1. Compare the distribution patterns of
the three populations.
9. The Bermuda grass population has
the greatest density.
2. Which population has the
greatest density?
10. availability of sunlight, nutrients, or
water; presence of other organisms
that feed on the plants; the space
available to each individual plant
3. Infer from recorded data from the
possible causes for the differences in
the population density.
11. Any change in the factors listed in
question 4 could lead to change in
population density
4. What conditions could change the
density of any of the population.
12. 5. Describe how a population’s density can be
used to learn about the needs and
characteristics of that population.
Population density is based on the
relationship between the needs of individual
species and a complex mix of limiting factors.
Differences might point to potential problems
such as pollutants or disease.
