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1. 
Refer to the diagram above. Which of the following is the MOST important energy source for grass in this ecosystem?
A.
B.
C.
D.
2.  SUN -> STRANGLER -> FIG -> CATERPILLAR -> LIZARD -> HARPY EAGLE What would happen if pesticides drastically reduced the number of caterpillars in this food chain?
A.
B.
C.
D.
3. 
Two dogs are pulling on opposite ends of a rope. The dog on the left is pulling with a force of 25 newtons. The dog on the right is pulling with a force of 60 newtons. What will be the resulting motion?
A.
B.
C.
D.
4. 
In the chemical reaction between hydrochloric acid () and calcium carbonate (), which of the following elements cannot be part of the products?
A.
B.
C.
D.
5.  Acquired or learned behaviors can not be passed on genetically. Which of the following is NOT an inherited trait?
A.
B.
C.
D.
6.  Decomposers obtain energy by breaking down wastes and the remains of dead organisms. _________________________
A.
B.
7.  A wheeled cart is moving eastward at a speed of 1 meter per second when it is acted on by a 30-newton force to the north and a 30-newton force to the south. Which of the following BEST explains why the cart’s speed and direction stay the same?
A.
B.
C.
D.
8.  Water, sunlight, and soil are ____________________ factors in an ecosystem.
9.  Xenon is a gas at room temperature. Because of the arrangement of the periodic table, which other element can BEST be predicted to share this physical property?
A.
B.
C.
D.
10. 
Where on the diagram should the student place the moon to accurately show its position relative to the Earth and the sun during a full moon?
A.
B.
C.
D.
11.  Which element on the periodic table has physical properties MOST similar to the physical properties of chlorine?
A.
B.
C.
D.
12.  Which of the following determines the identity of an element?
A.
B.
C.
D.
13. 
Based on the diagram above, which of the following is a major producer of energy in this ecosystem?
A.
B.
C.
D.
14.  Second-level consumers may be either carnivores or omnivores. _________________________
A.
B.
15.  Which of the following is an example of a chemical reaction?
A.
B.
C.
D.
16. 
Like the one below, chemical equations must be balanced. This shows that
A.
B.
C.
D.
17.  The Sun provides radiant energy to ____________, which converts the suns energy to glucose and oxygen.
18. 
The diagram below illustrates the basic structure of an atom. What is wrong with the diagram?
A.
B.
C.
D.
19.  The Milky Way is an example of a galaxy with a _______________.
A.
B.
C.
D.
20. 
Which statement best describes a relationship shown by this energy pyramid?
A.
B.
C.
D.
21. 
Which organisms belong to the same food chain?
A.
B.
C.
D.
22.  Bees and flowers are abiotic factors in an ecosystem. _________________________
A.
B.
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