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!
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.
survival of the fittest
Both objects will hit the ground at the same time.
There is not enough information to determine an outcome.
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.
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
number of protons
number of neutrons
number of atoms
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.
daylight savings time
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.
double displacement reaction
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.
It is sexual reproduction.
It produces four haploid daughter cells.
It involves only one cell division
The number of chromosomes is reduced by half.
reason the universe was created.
beginning of life.
origin of the universe.
law of gravity.
the Coriolis effect
rotation of the Earth
convection in the Earth's mantle
Nuclear fusion of hydrogen atoms into helium atoms.
Combustion of hydrocarbons.
Nuclear fission of uranium-235.
A chemical reaction between gases and oxygen.
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.
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.
the gravitational pull of the Moon on planet Earth
varying wind intensity
density differences in sea water
movement of tectonic plates
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.
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.
Answer choice (B) describes the opposite of what the data shows. Without calculating or inferring the slope of each line, it would be impossible to tell which individual’s heart rate increased at a faster rate, if you were able to calculate the slope of the line you would find that the opposite of this statement is true, so answer choice (C) is incorrect. Be careful! An answer choice like this one is intended to trick you into wasting time with complicated calculations; it is much easier to estimate the slope of each line and see that the heart rate of the trained individual is less steep than the untrained individual. From this, you can conclude that the trained individual’s heart rate is increasing at a slower rate than the untrained individual. Finally, while you may know from prior knowledge that answer choice (D) has been found to be true in most cases, you cannot infer this from the table provided, in which the resting heart rates of only one untrained and one trained individual are shown.
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.
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.
- 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.
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.
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.