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Worksheets7th Grade Science Review
Total questions: 78
Worksheet time: 1hrs 17mins
Name
Class
Date
1.
A paleontologist organized fossil information found over a period of time. What does his information show?
a)
The horse has not changed over time.
b)
The horse will become extinct.
c)
Horses developed smaller forelegs and teeth over time.
d)
The modern horse evolved from a much smaller ancestor.
2.
An environmental scientist says that mountains do not fit into any specific biome. what is the reasoning behind this statement?
a)
No precipitation falls on a mountain.
b)
Mountains are very common.
c)
The temperature in a mountain region cannot be measured.
d)
Conditions vary widely from the base to the summit of a mountain.
3.
Laura is writing an essay on modern evolution. As part of her research, she discovers three different fossils of fish. From this evidence, she concludes that modern organisms are evolving rapidly. Which of the following MOST accurately describes this conclusion?
a)
The conclusion is false because it is not supported by the fossils.
b)
The conclusion is true because Laura is writing a thesis.
c)
The conclusion needs further study because the sample is limited and biased.
d)
The conclusion is true because it was reached by someone studying science.
4.
Which of these organisms are decomposers?
a)
grasses
b)
fungi
c)
herbivores
d)
carnivores
5.
Many related classes of organisms are grouped into the same
a)
genus
b)
phylum
c)
species
d)
family
6.
Which description BEST represents the lengths of summer and winter in the taiga biome?
a)
8 months of winter & 3 months of summer
b)
6 months of winter & 6 months of summer
c)
3 months of winter & 8 months of summer
d)
11 months of winter & 1 month of summer
7.
Which situation BEST represents active transport in a cell?
a)
Clothes are pushed into a hamper that is already filled.
b)
Lemonade is poured out of a full pitcher.
c)
Sugar is dissolved in a glass of hot tea.
d)
One student is placed at each desk.
8.
Which type of tissues provide support for the human body and attaches the various parts together?
a)
muscle
b)
nervous
c)
connective
d)
sensory
9.
The word symbiosis has a Greek origin. What is the MOST LIKELY translation of the word in Greek?
a)
hiding
b)
building
c)
making food
d)
living together
10.
What is the role of this human body system?
a)
to bring oxygen to cells
b)
to extract nutrients from food
c)
to remove wastes from blood
d)
to control growth and development
11.
A researcher discovers that a heterotrophic, unicellular organism has cell walls made of chitin. What type of organism is the researcher studying?
a)
plant
b)
protist
c)
fungi
d)
bacteria
12.
Which biome is MOST like the desert in terms of precipitation?
a)
tundra
b)
tropical rain forest
c)
temperate deciduous forest
d)
temperate grassland
13.
Where do rivers begin?
a)
in estuaries
b)
in ocean inlets
c)
in marshes
d)
in mountain streams
14.
Alissa noticed that her parents, brother, and sister all have blond hair. She concluded that blond hair is a dominant trait. What is the flaw in her reasoning?
a)
Her conclusion is based on the color she preferred.
b)
Her conclusion is not presented as a chart.
c)
Her conclusion is based on insufficient evidence.
d)
Her conclusion ignores eye color.
15.
Which type of plant leaves are an adaptation for life in a warm forest?
a)
thin needles that conserve water
b)
broad flat leaves that collect sunlight
c)
needles that limit the movement of oxygen
d)
narrow blades that prevent the flow of carbon dioxide
16.
A scientist is investigating the process through which a sperm cell joins with and egg cell during sexual reproduction. This process is known as
a)
meiosis
b)
division
c)
ovulation
d)
fertilization
17.
The diagram shows how matter flows through an ecosystem. What is one way that plants benefit from animals?
a)
Plants use oxygen released by animals
b)
Plants need animals to break down sugars.
c)
Plants depend on animals as a food source.
d)
Plants use carbon dioxide released by animals.
18.
Which of these factors is a biotic factor in a forest ecosystem?
a)
temperature of the soil
b)
types of trees that grow there
c)
amount of precipitation each year
d)
amount of sunlight that reaches the ground
19.
Scientists attempt to develop an accurate fossil record. Which statement is BEST supported by the fossil record?
a)
New species develop every day.
b)
Most species that ever existed have become extinct.
c)
Most species persist for millions of years without change.
d)
Species have only started to become extinct in recent times.
20.
Which process releases carbon dioxide into the atmosphere?
a)
respiration
b)
photosynthesis
c)
transpiration
d)
precipitation
21.
Olivia is completing the chart above to describe a fox. What terms are missing from the chart?
a)
eukaryotic; heterotroph
b)
eukaryotic; autotroph
c)
prokaryotic; heterotroph
d)
prokaryotic; autotroph
22.
What process do cells use to release energy when they cannot be supplied with oxygen?
a)
meiosis
b)
selection
c)
fermentation
d)
binary fission
23.
A researcher studying brine shrimp made the graph above. Based on the graph, the researcher can conclude that brine shrimp eggs
a)
usually hatch within 24 hours.
b)
do not hatch at temperatures above 25 degrees Celsius.
c)
take longer to hatch at colder temperatures.
d)
hatch more quickly as temperature decreases.
24.
Which scientific information could NOT have been identified without the development of the microscope?
a)
the location and properties of biomes
b)
the existence of cells and their contents
c)
the types of traits that are controlled by alleles
d)
the separation of the marine ecosystems into zones
25.
Which are organs and tissues of the respiratory system?
a)
skin, hair, and nails
b)
pharynx, trachea, bronchi, and lungs
c)
bones, cartilage, ligaments, and tendons
d)
esophagus, stomach, small intestine, and colon
26.
Materials move from one part of the cell to another through the organelle labeled
a)
organelle A
b)
organelle B
c)
organelle C
d)
organelle D
27.
Which human body system is different in males and females?
a)
endocrine system
b)
lymphatic system
c)
reproductive system
d)
integumentary system
28.
What color is it?
Is this question useful for a dichotomous key?
Is this question useful for a dichotomous key?
a)
Yes, it will eliminate many organisms
b)
Yes, it describes more than 1 flower.
c)
No, it is not a question about a physical trait.
d)
No, it has many more than two possible answers.
29.
After Darwin, other scientists designed experiments to test his observations and conclusions. What was the reason for the further research?
a)
Darwin's conclusions were unexpected so it is likely they were wrong.
b)
Investigations must be repeated many times before the results are accepted.
c)
Other scientists were jealous of Darwin's success and wanted to prove him wrong.
d)
Other scientists repeat experiments in hopes of sharing in the credit for the discovery.
30.
The role of the excretory system in the human body is to
a)
produce food
b)
obtain oxygen
c)
remove wastes
d)
release energy
31.
The cell above has been placed in a solution containing dissolved particles. The cell membrane is permeable to water, but not to the dissolved particles. What will immediately happen to the cell?
a)
The cell will burst.
b)
Water will leave the cell.
c)
Water will enter the cell.
d)
The cell will surround the particles.
32.
A jellyfish is a multicellular organism that lives in the ocean. It obtains nourishment mostly by eating small fish. Its cells do not have a cell wall and it moves by pushing water outward. What type of organism is a jellyfish?
a)
plant
b)
animal
c)
fungi
d)
protist
33.
An organism has sharp canine teeth. How might this be an adaptation that helps the organism to survive?
a)
It makes the organism a successful carnivore.
b)
It helps the organism to stay warm in low temperatures.
c)
It enables the organism to breathe easier.
d)
It allows the organism to protect itself from predators.
34.
Which animal is MOST LIKELY to be found in a tropical rain forest?
a)
polar bear
b)
buffalo
c)
parrot
d)
lynx
35.
The diagram shows an energy pyramid for a marine ecosystem. According to the diagram, the greatest loss of energy takes place between
a)
phytoplankton and crustaceans
b)
crustaceans and herring
c)
phytoplankton and herring
d)
herring and mackerel
36.
How are the offspring of sexual reproduction different from the offspring of asexual reproduction?
a)
The offspring of asexual reproduction cannot reproduce when they are mature.
b)
The offspring of asexual reproduction have the same genetic material as the parent.
c)
The offspring of sexual reproduction have the same genetic material as the parent.
d)
The offspring of sexual reproduction can reproduce only through sexual reproduction.
37.
Spanish moss grows on the branches of oak trees. The moss benefits from being high and the tree is neither helped nor harmed. What type of relationship exists between these organisms?
a)
mutualism
b)
parasitism
c)
competition
d)
commensalism
38.
How does active transport differ from passive transport?
a)
Active transport involves an expense of energy.
b)
Active transport involves the movement of large particles.
c)
Active transport involves animal cells as opposed to plant cells.
d)
Active transport involves the movement of materials into or out of a cell.
39.
How does an amoeba differ from a tomato plant?
a)
The plant is not made up of cells.
b)
The plant is not a living organism.
c)
The plant does not have cells that contain organelles.
d)
The plant has organs and systems.
40.
What measurement is taken with this tool?
a)
weight
b)
mass
c)
length
d)
volume
41.
What is one of the products of photosynthesis?
a)
sunlight
b)
oxygen
c)
chlorophyll
d)
carbon dioxide
42.
The diagrams show two cells. Cell A must be a type of
a)
plant
b)
protist
c)
fungus
d)
bacteria
43.
What conclusion can be reached based on the diagram?
a)
Turtles are more like frogs than birds are.
b)
Only mammals have not changed over time.
c)
Only birds and reptiles share a common ancestor.
d)
Invertebrates and vertebrates share a common ancestor.
44.
Which quotation is an example of a scientist drawing a conclusion?
a)
"I think ribosomes are involved in making proteins."
b)
"Ribosomes are formed from proteins and genetic material."
c)
"Do cells that make many proteins have more ribosomes than other cells?"
d)
"Observations support my hypothesis that cells that produce large amounts of proteins have many ribosomes."
45.
An elephant breaks one of her tusks against a tree. A few months later, she gives birth to a baby. Based on this event, what is the likelihood that the baby will born with a broken tusk?
a)
0%
b)
25%
c)
50%
d)
100%
46.
Which type of cell might be produced by meiosis?
a)
heart cell
b)
egg cell
c)
nerve cell
d)
blood cell
47.
A researcher has developed a food web to describe a specific ecosystem. What is the purpose of a food web?
a)
to count the number of organisms in each population
b)
to predict how a group of organisms will change over time
c)
to show how matter and energy flow through the ecosystem
d)
to identify changes that have occured in a species over generations
48.
Kidneys are composed of several tissues that work together to filter wastes from the body. At what level of organization within the body are kidneys?
a)
cells
b)
tissues
c)
organs
d)
systems
49.
Darwin practiced selective breeding in pigeons. What does this mean?
a)
He observed them closely to identify their traits.
b)
He determined the relative ages of pigeon fossils.
c)
He only allowed birds with desirable traits to reproduce.
d)
He transferred genetic material from one bird to another.
50.
Margie's science class is studying the composition of sea water. Margie accidentally drops a graduated cylinder and it breaks on the floor. Margie should
a)
immediately tell her teacher
b)
stay away from the spill until the end of class.
c)
quickly pick up the broken glass, then tell her teacher.
d)
clean up the glass along with any water, and throw it all in the trash can.
51.
Jared is studying biomes using a map. Which is the northernmost biome?
a)
tundra
b)
savanna
c)
tropical rain forest
d)
temperate deciduous forest
52.
The Punnett square shows the result of a cross between two parents. Which represents the genotypes of the two parents?
a)
RR and RR
b)
rr and rr
c)
RR and rr
d)
Rr and rr
53.
The dodo bird is an herbivore that once flourished on the island of Mauritius. Explorers landed on the island and some brought animals that hunted the dodo bird. Because of this change, the dodo population MOST LIKELY
a)
decreased because predators killed them
b)
increased to make up for any losses
c)
was not affected because the animals were new to the island.
d)
became predators that fed on the new animals.
54.
What is a danger of excessive inbreeding in animals such as dogs?
a)
It increases the likelihood of inheriting two recessive alleles for a disorder.
b)
It introduces new and unexpected traits into a population.
c)
It produces a population of dogs that cannot reproduce.
d)
It results in fewer numbers of offspring over time.
55.
Which food chain exists in this ecosystem?
a)
hawk > caterpillar > snake > cricket
b)
snake > hawk > rabbit > cricket
c)
shrew > cricket > bird > hawk
d)
grass > cricket > shrew > snake
56.
What is one way that cloning is different from hybridization?
a)
Cloning takes the best traits from different organisms.
b)
Hybridization results in the production of new organisms.
c)
Cloning produces offspring that are identical to the parent.
d)
Hybridization transfers genetic information directly from one organism to another.
57.
Where is the DNA contained in the cell?
a)
nucleus
b)
chloroplast
c)
endoplasmic reticulum
d)
nucleolus
58.
A cell with 10 chromosomes undergoes mitosis and cytokinesis. How many daughter cells are produced and what number of chromosomes do they have?
a)
2 daughter cells, 5 chromosomes each
b)
1 daughter cell, 10 chromosomes each
c)
4 daughter cells, 20 chromosomes each
d)
2 daughter cells, 10 chromosomes each
59.
Blue flowers (B) are dominant. Green flowers (b) are recessive. If a male blue flower plant with genotype Bb is crossed with a female blue flower plant with genotype Bb, what is the percent chance that they will have a green flower offspring?
a)
25%
b)
50%
c)
75%
d)
100%
60.
Who was the monk that discovered the idea of heredity and genes?
a)
Albert Einstein
b)
Charles Darwin
c)
Gregor Mendel
d)
Alexander Graham Bell
61.
Animal fossils are more plentiful than plant fossils because animals contain ...
a)
hard parts such as bones, teeth, and shells.
b)
soft parts such as flesh and hair
c)
large amounts of water
d)
small amounts of chemicals
62.
A group of similar organisms that can mate with each other and produce fertile offspring is known as a (an):
a)
natural selection
b)
adaptation
c)
selective breeding
d)
species
63.
The process by which organisms with favorable traits survive and reproduce at a higher rate than organisms without the favorable trait is called:
a)
evolution
b)
natural selection
c)
overproduction
d)
scientific theory
64.
The bones in a whale's flipper are similar in structure and location to a human arm. A whale's flipper and a human arm would be known as what?
a)
homologous structures
b)
evolution
c)
adaptation
d)
vestigial structures
65.
The scientific name for the African Elephant is Loxodonta africana. What is the African Elephant's Genus?
a)
africana
b)
Elephant
c)
Species
d)
Loxodonta
66.
Mr. Cole is making a dichotomous key to help identify the plants in his garden. How many choices should each section of his key have?
a)
1
b)
2
c)
3
d)
4
67.
What is the science of classifying and naming living things called?
a)
dichotomous key
b)
binomial nomenclature
c)
kingdoms
d)
taxonomy
68.
What is the role of the Sun in a forest ecosystem?
a)
It decomposes wastes into nutrients
b)
It gives chlorophyll to the producers
c)
It allows oxygen to be formed in the animals
d)
It provides the energy for all living organisms
69.
The study of the interactions between organisms and their environment is called ...
a)
Life science
b)
Ecology
c)
Horticulture
d)
Ecosystems
70.
Things such as food, shelter, or water act as ______ on any population in its environment.
a)
limiting factors
b)
carrying capacity
c)
food chains
d)
these are not important
71.
Which of these best explains why predators need plants, such as grass, in their ecosystem?
a)
Plants are a large part of their diet
b)
Plants provide shelter for the predators
c)
Plants break down the organisms that the predators eat
d)
Plants provide food for the animals that the predators eat
72.
What do we call the biome that exists where freshwater from a river meets ocean saltwater?
a)
Wetland
b)
Swamp
c)
Marsh
d)
Estuary
73.
Which one shows the correct order of the classifications in taxonomy?
a)
Kingdom, phylum, order, class, family, genus species
b)
kingdom, phylum, class, order, family, genus, species
c)
kingdom, order, family, phylum, species, genus, class
d)
none of these are correct
74.
What is the scientific name for cells that have a nucleus?
a)
prokaryotic
b)
unicellular
c)
eukaryotic
d)
gametes
75.
What cell type does not have a cell wall?
a)
plant cell
b)
fungi cell
c)
animal cell
d)
all cells have a cell wall
76.
You are looking at the side of cliff made of sedimentary rock. Which layer of rock will be the oldest?
a)
the top layer
b)
the middle layer
c)
the bottom layer
d)
there is no way to know
77.
Which choice is not a type of muscle?
a)
smooth
b)
skeletal
c)
cardiac
d)
tendon
78.
Which biome has the most rainfall?
a)
desert
b)
tropical rainforest
c)
tundra
d)
temperate forest
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