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7th Grade Science Final Study Guide Part II
Test Description: Questions to study for comprehensive final in 7th Grade Science
Instructions: Answer all questions to get your test result.
1) After a volcanic eruption has covered an area with lava, which of the following is the most likely order of succession in the repopulation of the area?
A
shrubs - grasses - trees- lichens
B
grasses - trees- mosses -lichens
C
mosses-grasses - lichens - trees
D
lichens - grasses - shrubs - trees
2) If a paleontologist finds fossils of many different species existing in the same area at approximately the same time, the paleontologist can conclude that the ecosystem in this area had a high degree of -
A
climatic variation
B
geographic isolation
C
episodic speciation
D
biological diversity
3) Which organisms are carnivores
A
rabbits and birds
B
foxes and owls
C
grasshoppers and mice
D
carrots and grasses
4) Which organisms receive energy from the grasshopper?
A
mice and birds
B
owls and birds
C
grasses and grains
D
mice, owls, and birds
5) Earth has a variety of environments. Each with different resources. Insecticides and Pesticides affect the environment by _______________.
A
changing the landscape of an area through erosion
B
increasing salinity of the oceans
C
collecting in and polluting fresh water supplies
D
destroying fossil fuels that are important energy sources
6) Uneaten food parts such as orange peels and eggshells can be placed in which container to conserve resources?
A
a garbage landfill
B
a trash can
C
a compost pile
D
a recycling container
7) All of the following are ways that the atmosphere makes the existence of life on earth possible EXCEPT --
A
maintains a constant temperature.
B
shields Earth from small collisions
C
allows for gas exchange between plants and animals.
D
offers protection from radiation
8) Which organ system contains two large sacs with the exchange of gases taking place in the alveoli?
A
digestive
B
nervous
C
circulatory
D
respiratory
9) Where does a chemical reaction take place in the digestive system?
A
esophagus
B
rectum
C
anus
D
stomach
10) When communities replace one another in an ecosystem after a forest fire, what kind of ecological succession does this represent?
A
primary then secondary
B
primary and secondary
C
secondary
D
primary
11) Which of these best illustrates natural selection?
A
An organism with favorable genetic variations will tend to survive and breed successfully.
B
A community whose members work together utilizes all existing resources and migratory routes.
C
A population monopolizes all of the resources in its habitat, forcing other species to migrate.
D
The largest organism in a species receive the only breeding opportunites.
12) In a food web, what does the arrows represent?
A
one community replacing another
B
life cycle stages
C
renewable resource depletion
D
flow of energy
13) The bands on a pair of chromosomes represent ?
A
specific genes
B
sperm cells
C
egg cells
D
reproductive hormones
*select an answer for all questions
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