Worksheets7th Grade EOC Review
Total questions: 25
Worksheet time: 13mins
Anna found a bone while working on an excavation. She identified it as a dinosaur bone. What event had to happen for this fossilized bone to exist?
a. The dinosaur’s soft tissues were replaced with stone.
b. The dinosaur’s body was exposed to the air for a long time.
c. The dinosaur’s body was submerged in seawater for a long time.
d. Minerals seeped into the dinosaur’s bones before they completely decomposed.
A scientist described two modern-day species as sharing a common ancestor. Which is a valid claim about what it means when two species share a common ancestor?
a. It means that both species evolved from one species that lived in the past.
b. It means that the two species are actually the same species.
c. It means that one of the species evolved from one species that lived in the past.
d. It means that the two species share all the same traits.
What is natural selection?
a. The process by which humans breed a species for certain traits.
b. The process in which inherited traits of a population change over many generations.
c. The process by which Charles Darwin noted the differences in finches while visiting the Galapagos Islands.
d. The process by which individuals that are better adapted to their environment are more likely to survive and reproduce.
Polar bears live in the Artic. Ice in the artic is melting rapidly, reducing the range in which the polar bear
can live. If polar bears do not have adaptations that allow them to survive these changes, which may
happen to the polar bear?
They may overpopulate.
They may become extinct.
They may change the environment.
They may become another species.
What did Darwin observe about finches of the Galapagos Islands?
a. Their feathers were adapted to match their environment.
b. Their beaks were adaptations to the foods the finches ate.
c. They had homologous structures with other flying vertebrates.
d. They were unrelated to mainland species.
Each level of organization in an ecosystem is made up of parts. Which of the following is an example of the population level of organization in a coral reef ecosystem?
a. seawater
b. a clown fish
c. a group of anemones
d. a colony of coral and a stand of seagrass
There are 4 levels of organization in an environment. The figure below shows the levels of
organization in a wetland environment. Herons, snails, crabs, grasses, and other organisms live in
and around the wetland.
Which level of organization is label with number 3?
population
individual
ecosystem
community
Which of the following is an autotroph?
slime molds
plants
mushrooms
animals
Rainfall is an abiotic factor. If rainfall in an ecosystem decreases, what happens to the amount of
vegetation?
The amount of vegetation increases.
The amount of vegetation stays the same.
The amount of vegetation decreases.
The amount of vegetation first decreases and then increases
Remoras are small fish that attach to sharks but do not harm them. When sharks tear prey apart, remoras eat the leftovers. What statement about the relationship between remoras and sharks is true?
Remoras and sharks have a predator-prey relationship.
The relationship between remoras and sharks is an example of mutualism.
The relationship between remoras and sharks is an example of parasitism.
The relationship between remoras and sharks is an example of commensalism.
A certain population of bluebirds eats spiders as a major food source.
Which of the following ecosystem changes would impact this population of bluebirds the most?
an increase in the fish population
an increase in the spider and insect population
a decrease in the rabbit population
a decrease in the number of daylight hours
Scientists wanted to study how competition would affect two different deer species living in the same ecosystem. The result of their eight-year study is summarized in the graph below.
The population of white-tailed deer will equal the population of axis deer.
The population of white-tailed deer will most likely die out over time.
The population of white-tailed deer will continue to stabilize.
The population of white-tailed deer will dramatically increase.
A person touches a hot surface with his hand and his hand springs back. Which two systems are operating?
muscular system and endocrine system
nervous system and cardiovascular system
cardiovascular system and endocrine system
nervous system and muscular system
The tendency of a cell or an organism to maintain an stable internal environment is known as _______.
homology
homeostasis
homeopathy
homogeneous
What is the main function of the digestive system?
to exchange oxygen and carbon dioxide gases within the body
to break down food into nutrients that can be circulated throughout the body
to protect the body against foreign substances, such as bacteria and viruses
to send signals from one part of the body to other parts of the body
The muscular system and the skeletal system of the human body work together to
allow movement.
perform respiration.
protect the integumentary system.
transport nutrients.
In which cell organelle does photosynthesis take place?
cell wall
chloroplasts
mitochondrion
vacuole
Human beings are most capable of survival at an internal temperature of about 98 degrees. However, the temperature outside is rarely exactly 98 degrees.
If the temperature outside is a sweltering 103 degrees, how is a human's body likely to respond to maintain homeostasis?
switch on its cold-producing organs
constrict bloodflow to the arms and legs
reduce heat production and release sweat
make the person feel hungry, so he or she will take in more energy
During science class, a group of students went on a field trip to a nearby pond where they collected samples of pond water and pond plants. The students used a microscope to study cells in their samples. They also took samples of their own cheek cells and studied them using the microscope. The results are shown in the table.
Using the table provided, determine which of the following pairs of organelles or structures can be found in both plant and animal cells.
cell wall and chloroplast
cell wall and nucleus
cell membrane and nucleus
vacuole and chloroplast
Which of the following body systems has the main function of sending signals from one part of the body to other parts of the body?
I. excretory system
II. reproductive system
III. nervous system
IV. immune system
I, II, and III only
I only
III only
I and II only
Blood must flow to body organs within a relatively narrow range of pressures. The nervous system is able to detect changes in pressure within the circulatory system and respond to these changes by increasing or decreasing the heart rate and contracting or expanding blood vessels to control blood flow, as needed.
This example shows how...
each organ system is responsible for only one task.
blood is an organ in the nervous system.
the circulatory system is the most important system in the human body.
organ systems interact to maintain homeostasis within organisms.
Through the process of photosynthesis, light energy from the Sun was transformed into chemical energy in the form of sugar within a strawberry plant. The strawberries were then eaten by a bird, and the sugars were converted into other essential molecules, such as proteins or fats. When the bird produced waste, bacteria in the soil decomposed the waste into elements, such as carbon and nitrogen, which were recycled back into the ecosystem.
In this example, matter and energy changed forms and locations as they flowed through the ecosystem. What else is true?
The total amount of matter and energy increased.
Matter and energy were lost each time they changed forms.
Matter and energy were lost each time they changed locations.
The total amount of matter and energy remained the same.
Which of the following best describes the matter present in an ecosystem?
When an organism reproduces, new matter is added to its ecosystem.
The waste materials generated by one organism are often reused by other organisms.
The total amount of matter in an ecosystem is constantly decreasing due to the process of decomposition.
New matter is continuously generated by an ecosystem in a process known as photosynthesis.
Which of the following are the starting substances in photosynthesis?
water and oxygen.
glucose and carbon dioxide.
water and carbon dioxide.
glucose and oxygen.
Which of the following is a product of the photosynthesis reaction?
fructose
carbon dioxide
lactose
glucose
