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Science Assignment for week of March 16-20th

Assignment Number 1:


Read the Scholastic article "Hanging Tough"



This article has read aloud available.


Respond to the following questions after reading the article. (Make sure that each response is a complete sentence which begins by restating the question.)


1. Sloths are diurnal. Explain what diurnal means.

2. Which ecosystem do sloths live in? Give a brief description of that ecosystem.

3. How is "extreme slowness" beneficial for sloths?

4. What is happening to the habitat that sloths live in?

5. What are some things that Sam Trull and her team are doing to help save sloths?


You may email me your reading responses or you may answer your questions in a Google doc that you share with me. My email address is: Angela.Sorrell@yadkin.k12.nc.us





Assignment Number 2:


Keystone Species for President Poster


  1. You will read the following two articles (files uploaded on this page):
    1. “It’s a cat-eat-mouse world: Tracking the food chain from bacteria to man” and,
    2. “Keystone species.”
  2. After reading the two articles, add any relevant information to the A-Z chart that we have been working on in class.
  3. Next, you will choose a keystone species to research. Some examples of keystone species include: bison, prairie dogs, otters, honey bees, beavers, american alligators, hummingbirds, elephants, sea stars, sugar maple trees, and tiger sharks. (This is not an all inclusive list. You may choose a keystone species that is not listed here.)
  4. Find and include the following information on your keystone species for President Poster:
    1. Where in the world does your species live?
    2. In what type of ecosystem/habitat does your species live?
    3. What does your species eat?
    4. What organisms (if any) prey on your species?
    5. What major role does your organism play in its ecosystem that qualifies it as a keystone species?
    6. Drawings/pictures of your species must be included on your poster.
  5. The information above can be presented on your poster in any manner that you choose. It can be your “Why you should vote for them” or it can be part of a slogan/background. You can find examples of campaign posters at:  http://www.postermywall.com/index.php/g/campaign-posters
  6. On the back of the poster you will need to include:
    1. A food web of your species ecosystem. (Include at least six species), and
    2. identify the trophic level of each species in your food web (producer, consumer, decomposer).


Grading Rubric





4 Points

3 Points

2 Points

1 Point

Points Earned

Information from step 4 above

All information is provided.

One answer is missing or incorrect.

Two answers are missing or incorrect.

Three or more answers are missing or incorrect.


Food Web

6 species named and all arrows are accurate

1 arrow incorrect or all correct, but only 5 species named

2 incorrect arrows

OR 2 species

missing with all

arrows correct

OR 1 incorrect

arrow and 1

species missing.

3 incorrect arrows

OR 3 species

missing with all

arrows correct OR

some combination

of the two adding

up to three errors.


Trophic Levels

All trophic levels are correctly identified for each organism in the food web.

One organism’s trophic level is incorrectly identified.

Two organisms' trophic levels are incorrectly identified.

Three or more organisms' trophic levels are incorrectly identified.



Visually appealing,

exceptional use of

pictures/ drawings. 

Original layout and


2 of the three

criteria met:



exceptional use

of pictures/


Original layout

and design.

1 of the three

criteria met:



exceptional use

of pictures/


Original layout

and design

Project complete

with the exception

of making it a

‘keystone species

for president’


.  Layout

neatly done, but

missing out on the

three criter




No spelling errors.

One spelling error.

Two spelling errors.

Three or more spelling errors.



Grade:  ____/20 points