Try our free TASC Science practice test. This online exam includes challenging practice questions along with detailed explanations. The questions and topics are designed to be similar to those on the actual test. The TASC Science Test focuses on life science, earth science, and space science. It includes 47 questions that must be answered within 85 minutes. Start your test prep right now with our free practice test!
What kind of rock is created when existing rock types are transformed by heat and pressure?
Elements that are in the same column of the periodic table are in the same:
Use the energy pyramid below to answer the following question.
What would be considered a secondary consumer?
An autotrophic organism that produces energy from sunlight.
A worm that finds its nutrients in decaying roots and leaves.
A hawk that eats robins and other small omnivores.
A robin that eats worms and other insects.
Humans can breed plants and animals to have useful traits. By selecting which animals are allowed to reproduce, humans can influence an organism’s genotype. What name did Darwin use to describe this process?
survival of the fittest
Two objects on Earth are dropped from the top of a building that is 70 meters high. Object A has a mass of 12 g and object B has a mass of 6 kg. Assuming there is no air resistance, which object will hit the ground first?
Both objects will hit the ground at the same time.
There is not enough information to determine an outcome.
The birds pictured below are able to pick out food from the fur of the deer. The deer will not attack the birds. In fact, the deer knowingly lets the birds rest on it.
Which term best describes the relationship between the birds and the deer?
Which of these subatomic particles have a positive electric charge?
Which of the following best restates the law of conservation of energy?
The total energy of a system always diminishes.
Energy cannot be created or destroyed, only changed.
The sum of all forces equals the amount of energy in a system.
Mechanical and potential energy share an inverse relationship.
Two mice mate and produce offspring. Both of the mice have the genotype (Gg) which results in the phenotype of grey fur color. Use the Punnett square below to calculate the probability that these two mice will produce an offspring with white fur (gg).
Which of the following provides the correct hierarchy of organization present in every multicellular organism (from the least complex to the most complex)?
atom, molecule, organelle, cell, tissue, organ, organ system, organism
atom, molecule, cell, organelle, organ, organism
atom, cell, molecule, organelle, organ system, organ, organism
atom, cell, molecule, organ, organelle, organism
What numbers are needed in the blank spaces to balance the chemical equation?
S8 + __F2 → __SF6
What is the common name of the cycle shown above?
Which of the following is equal to the atomic number of a chemical element?
number of protons
number of neutrons
number of atoms
A cladogram is a diagram that organizes species into groups based on their similarities. It also shows evolutionary relationships among the groups.
Based on the information in this cladogram, which of these statements is true?
Primates evolved from sharks.
The original ancestor of all the species on the cladogram had a bony skeleton.
Dinosaurs are more closely related to crocodiles than they are to amphibians.
Ray-finned fish have an amniotic egg.
The cladogram shows that dinosaurs and crocodiles are closely related. They both have an amniotic egg and they both have two post-orbital fenestrae. Amphibians branched off before either of these developments, so they are less closely related.
Primates and sharks are on two different branches of this cladogram, so primates did not evolve from sharks. The cladogram shows that the original ancestor of all of these species was a vertebrate, but the original ancestor of the shark did not have a bony skeleton. Ray-finned fish branched off before the evolution of the amniotic egg.
Which TWO of these energy sources produce the most carbon dioxide?
What process is illustrated in the diagram below?
The tilt of the Earth's rotational axis toward or away from the sun causes:
daylight savings time
Which of the following is the best example of homeostasis?
A plant that uses light energy to make sugars from carbon dioxide and water.
A fish that evolves to live in fresh water.
A single cell divides into two identical daughter cells.
The human body regulating its internal temperature by shivering or sweating.
What process does this equation represent?
What type of reaction is shown in the equation below?
Reactants ⇒ Products + Energy
double displacement reaction
Select TWO processes that will cycle carbon and oxygen through an ecosystem.
Respiration and photosynthesis are important components of the carbon cycle. The carbon cycle is a combination of processes, including photosynthesis, decomposition, and respiration, by which carbon cycles throughout the land, oceans, and atmosphere.
What is true of mitosis?
It is sexual reproduction.
It produces four haploid daughter cells.
It involves only one cell division
The number of chromosomes is reduced by half.
The Big Bang theory is a model used to explain the:
reason the universe was created.
beginning of life.
origin of the universe.
law of gravity.
Which of the following best explains the movement of tectonic plates?
the Coriolis effect
rotation of the Earth
convection in the Earth's mantle
How does the sun produce energy?
Nuclear fusion of hydrogen atoms into helium atoms.
Combustion of hydrocarbons.
Nuclear fission of uranium-235.
A chemical reaction between gases and oxygen.
Use the table below to determine if the following hypothesis is supported by the given data.
Hypothesis: If more energy is derived from renewable resources (wind, solar, and water) annually, there will be less energy derived from coal; therefore CO2 emissions will decrease annually.
The hypothesis is supported because: more energy is derived from renewable resources annually and less CO2 emissions accrue annually.
The hypothesis is supported because: more energy is derived from renewable resources annually and more CO2 emissions accrue annually.
The hypothesis is not supported because: less energy is derived from renewable resources annually and less CO2 emissions accrue annually.
The hypothesis is not supported because: more energy is derived from renewable resources annually and more CO2 emissions accrue annually.
The table below suggests that decreasing the percentage of coal used for energy annually correlates with an increase in CO2 emissions. Given that the processing of coal is the primary contributor to CO2 emissions in the US, which of the following statements may explain the trend shown in the data table?
Although the percentage of total energy derived from coal decreased annually from 1990–2010, the demand for energy and the population in the US increased at a rate greater than can be equilibrated with the decrease in percent of coal energy. Therefore, CO2 emissions have steadily increased.
Although the percentage of total energy derived from coal decreased annually from 1990–2010, the demand for energy and the population in the US decreased at a rate greater than can be equilibrated with the increase in percent of coal energy. Therefore, CO2 emissions have steadily increased.
The processing of coal must not be the primary contributor to coal emissions in the US.
Renewable energy resources such as wind, solar, and water must emit more CO2 than the processing of coal.
Tides are changes in the sea levels of the ocean that occur periodically. Which of the following is the cause of ocean tides?
the gravitational pull of the Moon on planet Earth
varying wind intensity
density differences in sea water
movement of tectonic plates
DNA can best be compared to:
People who work within a building.
The individual rooms within a building.
The architectural blueprints of a building.
The steel and bricks that are used to construct a building.
Which of the following conclusions can be inferred from the data depicted in the graph?
The heart rate of the untrained individual was greater than the heart rate of the trained individual throughout the experiment.
The heart rate of the trained individual was greater than the heart rate of the untrained individual throughout the experiment.
The heart rate of the trained individual increased at a faster rate than that of the untrained individual as the work rate increased.
A greater resting heart rate is an indication of an untrained individual.
The healthy human body sweats when it becomes over heated in order to maintain homeostasis. Which of the following describes the feedback method used by a healthy human to regulate body temperature first in warm surroundings and then in cold surroundings?
When body temperature is too cold, the body starts sweating in order to cool down; when body temperature is too hot, the body starts shivering in order to warm up.
When body temperature is too high, the body starts shivering in order to warm up; when body temperature becomes too low, the body starts sweating in order to cool down.
When body temperature is too cold, the body starts shivering in order to warm up; when body temperature is too hot, the body starts sweating in order to cool down.
When body temperature is too high, the body starts to sweat in order to cool; when the body temperature becomes too low, the body starts shivering in order to warm up.
Animals that feed exclusively on plants are called:
If the couple has another child, what is the probability that this child will have brown hair?
Homozygous indicates two identical alleles for a hereditary characteristic. In this case, the woman has two alleles for red hair (bb). The genes are in lower case since they are recessive. She only has alleles for red hair, so she has red hair.
You can solve this type of problem by filling out a Punnett Square as shown below:
Children with the genotype BB will have brown hair, but none of the children have this combination of alleles.
Children with the genotype Bb will also have brown hair (because B is dominant), and 2 out of every 4 children, or 50%, will have brown hair.
Children with the genotype bb will have red hair, and 2 out of every 4 children will have red hair.
Which of the following best describes the carrying capacity of the fur seals?
Which of Newton's laws states the following:
- An object at rest will stay at rest unless an external force acts upon it.
- An object in motion maintains its velocity unless an external force acts upon it.
First Law of Motion
Second Law of Motion
Third Law of Motion
Law of Universal Gravitation
Newton's Second Law states that the acceleration of an object is proportional to the force applied to that object when mass is constant. Stated algebraically: Force = Mass × Acceleration.
Newton's Third Law states that objects exert forces equal in magnitude but opposite in direction on each other. Stated otherwise: For every action, there is an equal and opposite reaction.
An area beneath the ocean floor where tectonic plates move away from each other is known as a:
transform fault boundary
convergent plate boundary
divergent plate boundary
At a convergent plate boundary the tectonic plates move toward one another and collide. A subduction zone is where plates collide and one plate is forced under the other. At a transform fault boundary two plates slide past each other.
The addition of a catalyst to a chemical reaction will have what effect?
Increase the energy required for the reaction to take place.
Increase the time required for the reaction to take place.
Increase the rate at which the reaction takes place.
Reduce the amount of products in the reaction.
What name is given to a diagram that represents a single pathway by which energy and matter flow through an ecosystem?
The energy of an object resulting solely from motion is: