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Worksheets8th Grade General Science Final
Total questions: 60
Worksheet time: 39mins
Name
Class
Date
1.
A group of organs working together to perform a certain function is called
a)
an organ system
b)
a tissue
c)
a cell
d)
an organism
2.
Which structure’s main function is to produce food (sugar) in a plant?
a)
flower
b)
leaf
c)
stem
d)
roots
3.
Which two human body systems work together to perform locomotion?
a)
muscular and skeletal systems
b)
respiratory and endocrine systems
c)
reproductive and circulatory systems
d)
digestive and excretory systems
4.
An organism that contains chloroplasts is able to produce food by the process of
a)
photosynthesis
b)
reproduction
c)
respiration
d)
digestion
5.
Competition within a pack of wolves may increase if there is an increase in the
a)
amount of food available
b)
amount of oxygen available
c)
size of their population
d)
size of the area they inhabit
6.
Which sequence lists the hereditary material found inside cells from the smallest unit to the largest unit?
a)
chromosome → gene → nucleus
b)
chromosome → nucleus → gene
c)
gene → nucleus → chromosome
d)
gene → chromosome → nucleus
7.
A fox with thick fur would have a survival advantage over other foxes if
a)
there is more competition for food in the fox population
b)
the air temperature significantly decreases in winter
c)
a drought occurs, limiting the amount of water available
d)
a new disease appears that infects the foxes
8.
Infants will often smile when they hear a parent’s voice. In this situation, the parent’s voice is considered
a)
a stimulus
b)
a response
c)
an adaptation
d)
a resource
9.
Which fertilization and development method is most typical of humans before birth occurs?
a)
external fertilization and external development
b)
external fertilization and internal development
c)
internal fertilization and external development
d)
internal fertilization and internal development
10.
What is the main factor that prevents the growth of tropical plants in the northern part of the United States?
a)
predators
b)
pollutants
c)
overpopulation
d)
climate
11.
A puggle is a type of dog first produced by mating two other types of dog, a pug and a beagle. This process is an example of
a)
asexual reproduction
b)
genetic engineering
c)
selective breeding
d)
natural selection
12.
The information below describes a relationship between a type of fish known as a goby and a species of blind shrimp.
The shrimp digs a hole that provides shelter for itself and the goby fish. The goby fish lives at the opening to the hole and watches for predators. When a predator swims by, both organisms quickly move farther into the hole for safety.
The relationship between these two organisms is best described as
The shrimp digs a hole that provides shelter for itself and the goby fish. The goby fish lives at the opening to the hole and watches for predators. When a predator swims by, both organisms quickly move farther into the hole for safety.
The relationship between these two organisms is best described as
a)
competitive
b)
harmful
c)
beneficial
d)
predatory
13.
Which sequence identifies the levels of organization of body structures in a human from simplest to most complex?
a)
cell → organ → tissue → organ system
b)
organ system → cell → tissue → organ
c)
tissue → organ → organ system → cell
d)
cell → tissue → organ → organ system
14.
A student viewing a cell with a microscope observes a cell wall, a cell membrane, and a nucleus. The presence of these structures indicates that the student is looking at a cell from a
a)
rabbit
b)
carrot
c)
worm
d)
fly
15.
Dogs and cats are animals that have many similar body structures but they do not mate with each other. These two animals are classified in
a)
the same kingdom and the same species
b)
the same kingdom, but different species
c)
different kingdoms, but the same species
d)
different kingdoms and different species
16.
The hereditary material in corn plants can be altered by scientists so the plants produce more corn. Which term identifies this process?
a)
environmental degradation
b)
ecological succession
c)
natural selection
d)
genetic engineering
17.
The primary role of the endocrine system is to
a)
produce hormones that regulate body functions
b)
form chemicals that destroy microbes
c)
break down food to release nutrients
d)
upply red blood cells to carry oxygen
18.
Which process is responsible for the growth and repair of human tissue?
a)
evolution
b)
germination
c)
cell division
d)
natural selection
19.
Nutrients enter the bloodstream during the process of
a)
locomotion
b)
respiration
c)
absorption
d)
elimination
20.
Which type of organism converts wastes and dead materials into nutrients that can be used by plants?
a)
herbivore
b)
carnivore
c)
decomposer
d)
producer
21.
All of the different organisms interacting in a pond make up
a)
a community
b)
a population
c)
the water cycle
d)
a habitat
22.
One positive effect of recycling aluminum cans to manufacture new beverage containers is
a)
conserving Earth’s resources
b)
creating acid rain
c)
warming Earth’s atmosphere
d)
increasing the ozone layer
23.
An organism can be classified as an omnivore because it eats
a)
both plants and animals
b)
neither plants nor animals
c)
only plants
d)
only animals
24.
Which process releases energy from digested food
a)
photosynthesis
b)
cellular respiration
c)
vitamin production
d)
fertilization
25.
A body cell that is undergoing abnormal cell division is most likely
a)
producing sex cells
b)
transporting nutrients
c)
forming cancerous cells
d)
developing an infection
26.
Which model can be used to trace genetic inheritance?
a)
life cycle
b)
pedigree chart
c)
food web
d)
energy pyramid
27.
A green plant absorbs light. A frog eats flies. These are both examples of how organisms
a)
obtain energy
b)
escape predators
c)
produce offspring
d)
excrete waste
28.
A single human body cell typically contains thousands of
a)
genes
b)
nuclei
c)
chloroplasts
d)
bacteria
29.
What eventually happens to a species when the environment changes and the organisms do not adapt?
a)
classification
b)
development
c)
extinction
d)
regulation
30.
The human respiratory system is responsible for removing
a)
fat from cells
b)
carbon dioxide from blood
c)
hormones from glands
d)
nutrients from food
31.
A dialysis machine can be used to remove waste from a patient’s blood. Which human body system works in a similar way?
a)
reproductive
b)
excretory
c)
digestive
d)
endocrine
32.
Which gas is transported by the circulatory system in humans and is used by cells during respiration to release energy stored in food?
a)
carbon dioxide
b)
nitrogen
c)
oxygen
d)
hydrogen
33.
Which process is a cause of variation in a species?
a)
metamorphosis
b)
cellular respiration
c)
sexual reproduction
d)
regulation
34.
Which pathway do most nutrients take after a person takes a bite of food?
a)
digestive system → circulatory system → body cells
b)
circulatory system → body cells → digestive system
c)
digestive system → body cells → circulatory system
d)
circulatory system → digestive system → body cells
35.
Herbivores obtain most of their energy by
a)
consuming animals
b)
consuming plants
c)
producing sugar
d)
absorbing sunlight
36.
A biological community is made up of all the
a)
populations living in an area
b)
natural resources present in an area
c)
members of a species on Earth
d)
environments on Earth
37.
If an ecosystem’s balance is disturbed by a volcanic eruption, what will most likely occur?
a)
The ecosystem will not change from its original state.
b)
The ecosystem will eventually become balanced again
c)
The consumers in the ecosystem will begin to consume carbon dioxide.
d)
The consumers in the ecosystem will beginto produce more oxygen.
38.
The amount of which greenhouse gas in the air will increase the most if large forests are cut down to be used for building materials without planting new trees in their place?
a)
ozone
b)
methane
c)
water vapor
d)
carbon dioxide
39.
Which statement is an inference?
a)
A thermometer shows that the air temperature is 56°F
b)
A mineral sample of galena produced a gray-black streak when tested.
c)
Based on previous data, ten hurricanes may occur in the year 2013.
d)
A weather vane indicates the wind is coming from the west
40.
In living things, traits are passed on from one generation to the next by the transfer of
a)
blood
b)
minerals
c)
Calories
d)
DNA
41.
The sum of all chemical reactions that take place within an organism is known as
a)
evolution
b)
metabolism
c)
circulation
d)
reproduction
42.
The basic life functions of an organism are carried on by
a)
atoms
b)
cells
c)
nutrients
d)
hormones
43.
Which factor would most likely limit the number of mice living in an area?
a)
plentiful resources
b)
stable climate
c)
more predators
d)
less competition
44.
Which human organ system produces sperm or egg cells?
a)
digestive system
b)
nervous system
c)
respiratory system
d)
reproductive system
45.
Pesticides and fertilizers can help farmers to produce more crops. However, overuse of these chemicals can result in
a)
ecological succession
b)
material recycling
c)
environmental pollution
d)
selective breeding
46.
Fats are important nutrients because they
a)
provide genetic information
b)
contain stored energy
c)
are used in photosynthesis
d)
maintain bone density
47.
Which factor contributes to global warming?
a)
increased use of solar-powered cars
b)
increased burning of fossil fuels
c)
better long-term weather forecasts
d)
changing distance between Earth and the Sun
48.
Which organisms obtain energy for growth and development directly from the Sun?
a)
caterpillars
b)
hawks
c)
frogs
d)
bean plants
49.
What factor might contribute to the extinction of a species of woodpecker?
a)
a new source of food
b)
an overabundance of trees
c)
the use of pesticides in the forest
d)
an increase in the population of insects
50.
The fur of a snowshoe rabbit changes to white during the winter. This change is an example of
a)
adaptation
b)
competition
c)
metamorphosis
d)
metabolism
51.
The male sex cell is
a)
egg
b)
ovary
c)
testes
d)
sperm
52.
Organisms are classified as insects based on their
a)
method of reproduction
b)
internal and external structures
c)
natural habitat
d)
form of communication
53.
In sexual reproduction, what fraction of genes does each parent contribute to the offspring?
a)
1/4
b)
1/3
c)
1/2
d)
3/4
54.
Cells are to tissues as tissues are to
a)
microbes
b)
organs
c)
systems
d)
bacteria
55.
To provide energy for the work that cells do, all cells need
a)
chloroplasts
b)
nutrients
c)
carbon dioxide
d)
atmospheric nitrogen
56.
A new yeast cell is sometimes produced from a single parent by a process called budding. The process of budding is best described as
a)
sexual reproduction, with genetically identical offspring
b)
sexual reproduction, with genetically different offspring
c)
asexual reproduction, with genetically identical offspring
d)
asexual reproduction, with genetically different offspring
57.
The vast variety of different traits found in humans results from
a)
intensive training and education
b)
sexual reproduction and mutations
c)
exercise and conditioning
d)
birth defects and recessive genes
58.
Which factor has the least effect on a person’s metabolism?
a)
exercise
b)
hormone
c)
intelligence
d)
diet
59.
A new variety of tomato is better tasting and can be stored longer than other tomato varieties. This new tomato is produced by placing additional gene segments into the cells of the tomato plant. This process is known as
a)
genetic engineering
b)
selective breeding
c)
natural selection
d)
sexual reproduction
60.
Why are the fish able to survive in a pond?
a)
The fish use carbon dioxide produced by the plants.
b)
The fish use oxygen produced by the plants.
c)
The plants use oxygen produced by the fish.
d)
The plants use chlorophyll produced by the fish.
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