Biology
Chemistry
Physics
Astronomy
Miscellaneous
100
What are the 4 stages of Mitosis?
Prophase - the cell starts to break down some structures and build others up, setting the stage for division of the chromosomes
Metaphase - the spindle has captured all the chromosomes and lined them up at the middle of the cell, ready to divide
Anaphase - the sister chromatids separate from each other and are pulled towards opposite ends of the cell
Telophase - The cell is nearly done dividing, and it starts to re-establish its normal structures as cytokinesis (division of the cell contents) takes place
100
Which of the following pairs of substances are miscible? (miscible - forming a homogeneous mixture when added together)
a) Water and gasoline
b) Water and salt (NaCl)
c) Water and oxygen
d) Water and ethanol (alcohol)
d) Water and ethanol (alcohol)
Both ethanol and water are polar molecules are miscible.
100
A quantity having direction as well as magnitude, especially as determining the position of one point in space relative to another.
A vector
100
The 2nd most abundant element in the Universe.
Helium with around 23% and in 1st it's Hydrogen with around 75%
100
Dispersion is the breaking of light into these visible wavelengths. What are they called?
Colors
200
The world's largest land carnivore. The family is Ursidae and its genus is Ursus
The polar bear - Ursus maritimus
The polar bear is a hyper carnivorous bear whose native range lies largely within the Arctic Circle, encompassing the Arctic Ocean, its surrounding seas, and surrounding landmasses. It is the largest extant bear species, as well as the largest extant land carnivore.
200
Which quantity is conserved in every chemical reaction?
Mass
You can gain or lose total mass after a chemical reaction
200
Comparing an object that is dropped, and an identical object that is thrown horizontally from the same height at the same time, the time it takes to hit the ground is...
The same for each object
For this experiment, the two balls have very different horizontal velocities, but that does not affect the vertical motion. Both balls start with zero vertical velocity and accelerate at the same rate g.
200
How old is the Solar System?
Our solar system formed about 4.57 billion years ago from a dense cloud of interstellar gas and dust.
200
It can't fly or run quickly but this largest living lizard has a venomous bite that inhibits blood clotting. What is it?
A komodo dragon
300
Rosalind Franklin's x-ray diffraction images, taken in the 1950s most directly support what claims about DNA.
The basic molecular structure is a helix.
Since she specialized in crystallography, her X-ray diffraction picture of a DNA molecule was very clear and led to Watson's inspiration of a double helix model
300
Which type of stoichiometric calculation does not involve the gram formula mass?
It is volume-volume problems that do not require the use of molar mass (M = m/n). Here you are dealing with molarities and volumes to determine concentrations. Molar mass is not part of any calculations.
300
When an object is in a uniform circular motion, the direction of the acceleration is ...
Directed towards the center of the circle
300
Is the Large Magellanic Cloud is farther from the Earth than Andromeda?
No
The Large Magellanic Cloud is around 158200 light yrs away from the Earth versus the Andromeda galaxy which is 2.537 million light yrs away.
300
What animal is this?
A Fossa
The fossa is a cat-like, carnivorous Mammal endemic to Madagascar. It is a member of the Eupleridae, a family of carnivorans closely related to the mongoose
400
If ATP (hydrolysis) is inhibited, which types of movement is also inhibited?
Passage of a solute against its concentration gradient
If ATP (Adenosine triphosphate - provides energy to living cells) is inhibited in a cell, it would not be able to perform the uphill movement of solutes due to the lack of any source of energy to drive the process.
400
What chemical equation correctly represents photosynthesis?
H2O+CO2+sunlight → O2+glucose
6CO2 + 6H2O + sunlight → 6O2 + C6H12O6
400
A beam of light is unpolarized. This means that ...
Vibrations are occurring in all directions perpendicular to the direction of light propagations
400
_______ do not emit radiation on their own. They are detected by the radiation given off as material is heated in the accretion disk, and also by the gravitational effect on other nearby objects.
Black holes
The massive gravitational influence of a black hole distorts space and time in the near neighborhood. The closer you get to a black hole, the slower time runs. Material that gets too close to a black hole gets sucked in and can never escape.
400
What animal is in the photo?
A Vaquita - the world's rarest marine mammal
The vaquita, literally "little cow", is a species of porpoise endemic to the northern end of the Gulf of California. As of 2020, there are no more than 10 left.
500
Organisms that reproduce sexually exhibit zygotic, gametic, or sporadic meiosis. One way to determine the type of life cycle an organism has is by
Comparing the diploid (2 sets of chromosomes - 1 from each parent) and haploid (organism that has 1 copy of each chromosome) forms of the organism.
Life cycles are characterized by the timing of meiosis and the characteristics of the diploid and haploid generations.
500
The molar heat of vaporization of water is 42 kJ/mol. How much energy is released by the condensation of 3.0 g of water?
7 KJ or 7000 J
q = mols water (grams/moalr mass) x heat condensation mols of water
q = (3/18(2x1 + 16)) x 42
q = 7 KJ
500
Inside a solenoid, the magnetic field is
uniform
A solenoid is simply a coil of wire with a current going through it. Inside the coil the field is very uniform, and the field from a solenoid is essentially identical to the field from a bar magnet.
500
What are the stages that lead to a neutron star?
First is the stellar nebula where all stars form, a neutron star will form a massive star which leads to a red supergiant as it ages. Once there is run-away fusion, the star will explode and become a supernova and from there a neutron star is created (collapse of the red supergiant).
500
Name of a periodic comet that completes an orbit of the Sun once every 3.3 years. Was first recorded in 1786.
Comet Encke - First recorded by Pierre Méchain on 17 January 1786, but it was not recognized as a periodic comet until 1819 when its orbit was computed by Johann Franz Encke hance the name Comet Encke.