Science Questions Practice Flashcards
1 kilogram (kg) of solid X at 10°C and 1 kg of solid Y at 10°C each absorb 5 joules of heat energy. The final temperatures of X and Y are 15°C and 20°C, respectively. Compared to X, Y must have a lower
specific heat
30 students in a class carefully measure the length and width of 20 peanut shells. They also count the number and note the size of the peanuts inside. This information is recorded on various graphs showing the numbers of nuts and the different sizes. The collected evidence of the peanuts gives the students an idea of the extent of
variation within a species.
According to the Ideal Gas Equation (PV = nRT), if the temperature and amount of gas are kept constant, what will be the effect of an increase in pressure on the volume of a gas?
As the pressure increases, the volume decreases.
All living cells contain cytoplasm. Cytoplasm is important because it
controls what moves in and out of the cell.
All of these groups of land plants produce seeds EXCEPT
evergreen trees, such as pines and spruces.
All the glucose filtered from the blood in the glomerulus into the Bowman’s capsule of the kidney nephron is returned to the tissue fluid while passing along the proximal tubule. This rapid return is effected by the process of
active transport
Amnesia in humans is the loss of memory. Which of these parts of the brain has been affected when someone is suffering from amnesia caused by head trauma?
Cerebral cortex.
The amplitude of a sound wave is most closely related to its
loudness
Anaerobic respiration occurs in muscle tissue when it cannot get sufficient oxygen to function aerobically. Which of these conditions is most likely to directly result from this?
cramps
As an object falls freely near the surface of the earth, its speed increases, representing a transformation of
potential to kinetic energy
As part of the human immune response, which of these cells are responsible for producing antibodies?
lymphocytes
The atomic number of flourine is 9. How many electrons are contained in the second principal energy level of a flourine atom in the ground state?
7
The atoms of an element with seven valence electrons are most probably classified as
nonmetals.
At room temperature, which of these substances exists as diatomic molecules?
oxygen
The bending of a wave around an obstacle is known as
diffraction
The boiling point of liquid nitrogen at one atmosphere pressure is 77 K. This temperature is equivalent to.
- 196 C
The calorie and the kilocalorie are units of
energy
A cell which manufactures a large amount of protein for export would have an abundance of organelles called
ribosomes
Charles Darwin’s theory of evolution suggests that the reason for the various differences between species is a result of
natural selection
Cicero and Wozniak probably decided to restrict their study to male offspring of alcoholic male rats because they wanted to
compare results with prior findings from human studies
Cicero and Wozniak used young rats in their experiment instead of older rats because young rats are
more sensitive to alcohol.
A circuit contains three 3-ohm (W) resistors in series. What is the equivalent resistance of this combination?
9W
Compounds with the same type and number of atoms and the same chemical bonds but different spatial arrangements of these bonds and atoms are called
structural isomers.
Coulomb’s law is most closely associated with
Electric charges
A drop of dilute ammonium hydroxide (NH4OH) is placed on one side of a slide containing a large number of swimming paramecium. Under this condition, which of these behaviors of the paramecia will be observed?
They will eventually all swim away from the ammonium hydroxide.
Ductless glands in the human body secrete
hormones
During exercise, a person’s respiratory rate increases due to
an increase in CO2 concentration in the blood.
The energy associated with an object’s position is termed
potential energy.
Enzymes that are involved in biochemical reactions are organic
catalysts
An example of an adaptation to prevent water loss in plants is
waxy epidermis
An example of the most complex level of organization in a frog is the
respiratory system
The extension of a neuron that carries the impulse to another cell is called
axon
The force of gravity on an object is that object’s
weight
The full set of genes in an individual is known as
the human genome.
The functional group present in all alcohols is the
hydroxyl group
Ganglia are made up of a cluster of
neurons.
Guard cells which can be found in the leaves of plants are most closely associated with which of these processes?
Evaporation of water from the plant.
Heat energy is absorbed in which of these phase changes?
Br2 (l) -> Br2(g)
How much current is drawn by a light bulb that has a resistance of 100 R with a voltage of 110 V? (V = IR)
1.1 amperes
Human testes produce
spermatozoa
If all of the second-order consumers within an ecosystem of a region were removed, the most likely short-term effect would be
an increase in the number of first-order consumers.
If a person is fasting for 24 hours and ingests no carbohydrates, the liver will provide for the body’s need by
converting glycogen into glucose.
If a red light is passed through a dilute solution of chlorophyll solution, the spectrophotometer will detect what amount of transmittance of this light?
50 - 75%
If blue light emits electrons from a photosensitive surface, then electrons must also be emitted by
uv light
If the medulla of the brain in a human was damaged, which of these conditions would most likely result?
Difficulty in breathing
If the night temperature drops 50 degrees, the roadrunner’s internal energy-conservation permits a lowering of body temperature to
94 degrees
In a study on the effect of cocaine on the brains of rats, two groups of animals were selected. Each day, Group A was injected with the drug dissolved in water, whereas Group B was injected with water alone. In such a study Group B is included as
a control group
In classical physics, light is viewed as part of the electromagnetic spectrum, traveling in the form of transverse waves. Quantum physics proposes that light is composed of quanta called
photons
In corn plants, the gene that codes for the presence of chlorophyll is sometimes missing. The resulting seedlings are albino and will not survive. This lethal gene appears in corn populations because
the parent plants that produced the seeds carried the recessive gene for the albino trait
In diagnostic testing, the electroencephalogram permits the physician to
examine the impulses of the nerve cells within the brain
In ecological succession, the first living thing to colonize a hitherto barren area is called a
pioneer organism
The inherited factors that are transmitted in an organism from generation to generation are called its
genotype
In order to observe the endoplasmic reticulum in a cell, a scientist would use
an electron microscope
In the reaction of iron with water shown below, what coefficient must be placed before the iron (Fe) to balance the reaction? Fe + 4H2O ° Fe3O4 + 4H2
3
In varieties of matter, the term heterogeneous may be applied to
mixtures, but not elements or compounds.
Iodized salt is used to prevent a human condition known as
goiter
A lab technician has the choice of four different enzymes to use in an experiment that will run at 25°C. The optimal temperatures of enzymes using the Kelvin scale are: Enzyme A: 273 K, Enzyme B: 298 K, Enzyme C: 310 K, Enzyme D: 325 K. Which enzyme would be the best to use in this experiment?
Enzyme B
The Law of Dominance was proposed by which of the following scientists?
Mendel
A lens that focuses distant light to a single point is known as a
converging lens.
The light sensitive cells of the eye are called rods and cones. Which of these layers of the eye are they found in?
retina
A magician rapidly pulls a tablecloth from a table, leaving the dishes undisturbed. Which of these principles of physics explains this “trick”?
Objects at rest tend to remain at rest.
A material that settles out of a reaction is termed a
colloid
The meiotic division of cells leads to the production of cells that
contain half the usual number of chromosomes.
A method for determining the blood alcohol content of a subject is to
use a breathalyzer