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