UNIT 1 LIVING SYSTEMSChapter 3 Assessment..
Use < (is less than) or > (is greater than) to complete these
comparison sentences about variables that affect habitats.
Section 3.2
- Make a graph of the data (below) showing the population of
deer and wolf in a given area. Then, answer the questions
a through e.
a. From 1975 to 1995, the deer population increased by
how much? The wolf population decreased by how much
during the same time?
b. What would you have expected to happen to the wolf
population from 1975 - 1995 as the deer population was
growing?
c. What might be some causes for the deer population to
increase so rapidly?
d. What might be some causes for the wolf population to
decrease so rapidly?
e. What might happen if the deer population continues to
grow so fast? What factors will eventually limit the deer
population that can live on a certain area of land?Chapter Project
Researching a community
A community is made up of all the organisms that interact in a
given area. There are interesting communities all over the
world, such as forest, dessert, ocean reef, mountain-top, and
grassland communities. Choose a particular community that
interests you. Do research and find several examples of
producers, herbivores, primary carnivores, and secondary
carnivores. You may not find many examples of primary and
secondary carnivores, but find as many as possible. Find a photo
of each animal from a photocopied book or magazine, or printed
from a computer. Make a label for each animal that shows its
common name and scientific name (genus and species).
Construct a food chain mobile out of the photos and labels, using
yarn, string, straws, or some other material to make the proper
connections. Use a coat hanger or some other object that will
allow you to hang your mobile in the classroom. Your finished
mobile should show how each member of the community is
related in the food chain. Don't identify the community on the
mobile - see if your classmates can guess it!- Precipitation in the
rainforest ____
Precipitation in the
coniferous forest- Oxygen in the air at the
base of a mountain ____
Oxygen in the air at the
top of a mountain- Dissolved oxygen in
warm water ____
Dissolved oxygen in cool
water- Dissolved oxygen
in a pond ____
Dissolved oxygen
in a stream- Temperature near the
surface ____
Temperature on the
ocean floor of the ocean- Pressure in a
tide pool ____
Pressure in a deep ocean
trench- Amount of sunlight near
the surface of the ocean ____
Amount of sunlight on
the ocean floorYe a r Deer Population Wolf Population
1945 180 40
1950 170 40
1955 150 30
1960 180 30
1965 200 25
1970 220 25
1975 220 10
1980 290 8
1985 320 8
1990 360 3
1995 420 0