Worksheets8th Science Review
Total questions: 30
Worksheet time: 15mins
In living things, traits are passed on from one generation to the next by the transfer of
blood
minerals
calories
DNA
Which process involves choosing certain organisms to reproduce with one another in order to pass on specific, desirable traits to their offspring?
selective breeding
asexual reproduction
resource acquisition
natural selection
During which process do cells use oxygen to release stored energy?
photosynthesis
respiration
circulation
digestion
The sum of all chemical reactions that take place within an organism is known as
evolution
circulation
metabolism
reproduction
Which factor would most likely limit the number of mice living in an area?
plentiful resources
more predators
stable climate
less competition
Which health condition is an infectious disease?
pneumonia caused by microorganisms
heart problem caused by a high-fat diet
lung cancer caused by smoking
eye damage caused by ultraviolet light
Abnormal cell division in humans may result in
cancer
fertilization
asexual reproduction
dynamic equilibrium
Under which conditions would a sugar cube dissolve most quickly when placed in a liter of water at room temperature?
A whole sugar cube is added and the water is stirred.
A whole sugar cube is added and the water is not stirred
A crushed sugar cube is added and the water is stirred.
A crushed sugar cube is added and the water is not stirred.
Fossil fuels are considered nonrenewable because they
produce pollution
are no longer used by humans
often contain microscopic animals
take millions of years to form
Which cell structure is found in plant cells, but not in animal cells?
cell wall
nucleus
cell membrane
cytoplasm
Which term identifies a group of cells of the same type working together to perform a common function?
microbe
tissue
gene
hormone
Organisms are classified as producers or consumers according to the way they
obtain energy
release wastes
produce offspring
move from place to place
A community is composed of
organisms of the same species in an area
an organism’s food supply in an area
all of the different organisms living in an area
the living and nonliving components in an area
As a candle burns, the chemical energy stored in the wax is transformed into
heat and light
heat and magnetism
electricity and light
electricity and magnetism
Sandy heated 20 grams of liquid hydrogen peroxide until it was completely broken down into liquid water and oxygen gas. Which of these best describes the total mass of water and oxygen that was produced?
more than 20 grams since heat was added
20 grams since no matter was added or removed
less than 20 grams since oxygen gas is very light
more than 20 grams since there are two new substances
A solution is said to be acidic. What pH would you expect to see for this solution?
14
3
7
9
A mixture that appears to contain only one substance is a(an)
homogeneous mixture
heterogeneous mixture
element
compound
To find the number of neutrons in an atom, you would subtract
mass number from atomic number.
atomic number from mass number.
atomic number from electron number.
isotope number from atomic number.
The atomic mass of an element is
a ratio based on the mass of a carbon-12 atom.
twice the number of protons in one atom of the element.
the sum of the protons and neutrons in one atom of the element.
a weighted average of the masses of an element's isotopes.
Which statement is true about oxygen-17 and oxygen-18?
Their atoms have an identical mass
They do not have the same number of protons.
They are isotopes of oxygen.
They have the same mass number.
Which of the following is NOT a pure substance?
oxygen
water
milk
carbon dioxide
A change in food web to any population have effect on
other populations
abiotic factors
water
trees
A medicine which contain dead or weakened germs is used to prevent infectious disease is called a
antiseptic
antibodies
antibiotics
vaccine
A medicine which is used to treat or cure bacterial diseases by killing or stopping their growth of bacteria is called
antibody
antigen
antibiotics
antiseptics
What reservoir holds the greatest amount of water besides the oceans?
Atmosphere.
Glaciers.
Groundwater.
Lakes.
Where does the maximum water velocity occur in a meander bend?
In the middle of the river channel.
On the inside of the bend.
On the outside of the bend.
The velocity is the same in all areas
According to the principle of uniformatarianism,
geologic processes we observe today have operated in the past
geologic process in the past operated at a different rate as they do today
all of the planets formed from a uniform solar nebula
early Earth was covered by a uniform magma ocean
New seafloor is created at a ____________?
deep-sea trench
mid-ocean ridge
subduction zone
transform fault
Oxygen built up in the Earth's atmosphere because:
the oceans separated from the crust
rocks weathered and released their oxygen
algae and other organisms employed photosynthesis
oxygen settled on Earth from planets further from the sun
One example of biotechnology is the process of making fuel from
oil spills
corn
stem cells
cheese
