Physical Science Reading and Study Workbook Chapter 15 Answers

Affiliate fifteen Answer Cardinal

Study Guide

My Notebook

1. Answers will vary, but could include master ideas from the summary or 1 primary thought from each Reading (ii).
2. Students should have a drawing of a country based ecosystem with living organisms and natural or artificial objects such every bit the sun, clouds, dirt, rocks, water, litter, buildings, roads, etc.
3. (a) Figure 15.ix on p 419 shows an aquatic ecosystem. (b) Educatee answers volition vary simply could explicate that the figure title "Marine food web" is the same as proverb "common salt water nutrient web" or notice that organisms pictured in the figure live in water such equally red drum, dolphin, and grass shrimp.

Guided Reading

15.ane Terrestrial Ecosystems

1. ecosystem
2. land
3. Organisms
4. producer
5. consumer

15.2 Aquatic Ecosystems

6. water
7. salt
8. marine
9. terrestrial
10. runoff

Let'due south Review

1. a
2. a

Cheque Your Understanding

Reading 15.1

1. a
2. Answers may vary. Ex: A prairie food chain may begin with a producer such as a grass. A prairie canis familiaris is a main consumer for the grass. The prairie dog may then provide prey for a coyote. The coyote is host to fleas, which are parasites.
3. True or false: an ecosystem is a group of organisms interacting with one another and their physical surroundings.
4. Answers may vary. Ex: A parasite lives on a host. The host provides the parasite with things similar energy and shelter. The parasite does not benefit the host and may in fact impairment the host.
5. Answers may vary. A prairie dog is a primary consumer when it eats plants. The prairie domestic dog is too prey for animals such as coyotes. The prairie dog is a host for fleas.
6. Answers will vary. The food spider web should show the deer and mouse feeding on grass, the finch and squirrel feeding on the pine tree, the owl feeding on the squirrel, finch, and mouse, and the mountain panthera leo feeding on the squirrel, deer, and mouse. Arrows should exist drawn from the food source, to the organism that eats information technology to prove energy transfer.

Reading fifteen.2

1. B) Consumers
2. C) Freshwater ecosystems are very wet while terrestrial ecosystems are typically drier.
3. D) Marine ecosystems include oceans.
4. C) Frogs are amphibious.
5. A) Phytoplankton are producers in marine ecosystems.
6. Runoff tin behave with it chemicals such as phosphates that act equally fertilizers. This tin cause algal blooms. When algae plants die, decomposers break them down and employ oxygen in the h2o in the process, thus lowering levels of dissolved oxygen. Many organisms such as fish crave high levels of dissolved oxygen in order to survive. Algal blooms lower water quality and can alter marine nutrient webs since many organisms will die or leave the expanse when oxygen levels get too low to back up them.

Connexion: Undersea Arms Race

1. Dr. Vermeij was investigating the question Are some variations in shells linked to the different predators faced by snails in unlike areas?
2. Answers may vary. Sample answer: Boundless curiosity—Dr. Vermeij has collected shells since he was a pocket-sized child. Now he is considered 1 of the earth'due south leading experts in mollusks! A willingness to risk being wrong—since childhood, he had disliked scarred shells, until he realized that these scars were not just flaws but bear witness of strong defensive features. The scarred shells became vital to his enquiry. A passion for doing hard piece of work—Dr. Vermeij's research includes species collection, conscientious, time-consuming observation, precise record-keeping, and writing articles to share his work.
3. Dr. Vermeij learned to see the scars as sites of unsuccessful predator attacks. When predators fail, the snail's defensive traits can exist passed downwardly to the side by side generation. The scars provided key testify of the evolution of defensive traits.

Chapter Action: Terrestrial Nutrient Webs

Part ane: A stable population

Sample Information

Producers (Little Bluestem Grass)		1	two	three	4	5	6	7	eight	9	10
ane-3	population increase, +1		2	1	2		2	3	3
four-6	population decrease, -one					5				4	4
Population		ten	eleven	12	13	12	13	14	15	xiv	13
Consumer and Prey (Prairie Canis familiaris)		one	2	iii	4	v	half-dozen	7	8	nine	ten
i-iii	population increase, +1		2		2	2					1
4-6	population decrease, -1			vi			6	vi	6	five
Population		10	11	10	11	12	xi	10	9	8	ix
Predators (Coyote)		1	2	three	iv	5	vi	7	8	9	x
ane-3	population increment, +1		3			1	3		2	3
iv-6	population subtract, -1			5	6			4			4
Population		x	11	10	9	x	11	ten	11	12	11
Parasites (Flea)		one	2	3	iv	5	6	7	eight	ix	ten
ane-3	population increment, +ane			3				1		2
four-half dozen	population subtract, -1		6		four	5	4		6		iv
Population		10	9	10	9	eight	7	eight	7	eight	7

Part i: Questions

1. Answers may vary. The gain of 3 in the producer population.
2. Answers may vary. The prairie dog and predator populations were very shut to their starting levels.
3. Answers may vary. The population of each grouping will go up and down, but remain inside a range of v individuals of the starting population.

Part 2: Too many parasites!

Sample Information

Producers (Little Bluestem Grass)		1	2	three	4	5	vi	7	eight	ix	10
1-iv	population increase, +1		ane	1	iii	3	ane	2	4	1	ane
5-vi	population decrease, -ane
Population		ten	11	12	13	14	15	16	17	eighteen	19
Consumer and Prey (Prairie Dog)		1	2	3	4	five	6	7	eight	nine	10
1-ii	population increment, +1								2
3-6	population subtract, -one		vi	v	iv	3	3	3		6	4
Population		ten	9	8	7	6	v	4	5	4	3
Predators (Coyote)		1	2	3	iv	five	half dozen	vii	8	nine	10
1-two	population increase, +ane		2		2				1
iii-6	population decrease, -ane			v		iv	4	4		4	6
Population		10	11	x	11	10	9	eight	9	8	7
Parasites (Flea)		1	2	three	4	5	6	vii	viii	9	x
i-four	population increase, +ane		4				3	3	one	3	two
5-six	population decrease, -ane			vi	6	v
Population		x	11	x	9	eight	nine	ten	11	12	13

Part two Questions

1. Answers may vary. The population of producers is increasing. The other populations are decreasing.
2. Answers may vary. Since the population of prairie dogs is decreasing it is likely that the fleas are weakening the population. This may make the prairie dogs easier to grab. Another possibility is that the prairie dogs are unable to reproduce successfully because of their weakness.

Chapter 15 Review

Vocabulary

Reading fifteen.i

1. Terrestrial ecosystem
2. Primary Consumer
3. Prey
4. Producer
5. Parasites
6. Predator

Reading 15.2

7. Host
8. Marine ecosystems
9. Freshwater ecosystems

Concepts

Readings xv.1

1. Primary consumers feed on producers.
2. Fish lice are considered parasites within the marine ecosystem. They alive on and within their host fish, and obtain energy by consuming blood.
3. A prairie dog is a primary consumer of grasses and prey for coyotes.
4. Producers are establish at the lesser of a food web.
5. Food web

Reading xv.2

6. Freshwater ecosystems generally occupy less space and practice not contain saltwater.
7. In the pond ecosystem algae are producers. If algae receive less sunlight then they would be less likely to grow. A subtract in the producers in the pond ecosystem would likely lead to a decrease in predators like bass.

Math and Writing Skills

1. Organize the following creatures in a food web:

Dolphin Red drum Seaweed

Fish lice Oyster Blue crab

Seagrass

Sample food web:

Examination Exercise

1. Simulated. A frog may be a predator or prey in a freshwater ecosystem. Frogs are non parasites but could be hosts.
2. C
3. D
4. D

Chapter Project

Sample rubric

Marine, freshwater, or terrestrial ecosystem	Does not meet expectations	Meets expectations	Exceeds expectations
Organisms	3 or more of the "meets" criteria are missing or inaccurate	Identifies at least five organisms in an ecosystem Identifies the means each organism gets energy, the amount of space each organism needs Describes the adaptations/appearance of each organism	Includes all "meets" criteria AND describes at to the lowest degree 3 boosted organisms in the ecosystem for a total of 8
Nutrient webs	2 or more of the "meets" criteria are missing or inaccurate	Identifies producers and consumers, predators and prey, parasites and hosts Food web uses arrows to show the flow of energy in an ecosystem	Identifies producers and consumers, predators and casualty, parasites and hosts Food web uses arrows to bear witness the menstruum of energy in an ecosystem

moncadahathed.blogspot.com

Source: https://curiosityplace.schoolspecialty.com/delegate/ssi-wdf-ucm-webContent/Contribution%20Folders/CPO/HTML_TG/tx8/lessons/TX8_TG_15_AK.html

Share this post