PRAXIS: General Science Content Knowledge 5435 Questions and Answers
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PRAXIS 5421
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PRAXIS 5421
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PRAXIS: General Science Content
Knowledge 5435 Questions and
Answers
Diaphragm
✓ ~~~Part of the compound microscope used to regulate the amount of light being
transmitted through the specimen on the slide.
1 milligram
✓ ~~~1 x 10 -3 grams
Kepler
✓ ~~~His greatest contribution to science was that he described the orbits of the planets as
ellipses.
Newton
✓ ~~~Used the 3 laws of planetary motion to establish universal gravitation.
Mendel's Law of Independent assortment
✓ ~~~In a dihybrid cross, alleles for different traits separate and are inherited independently
of each other, resulting in a phenotype of 9:3:3:1. Which of Mendel's laws does this
illustrate?
Seven (7) is a neutral pH value. The pH scale goes from one (1) to 14. A value of
one (1) is extremely acidic, and a value of 14 is extremely basic.
✓ ~~~The pH of distilled water should have what value?
Uniformitarianism
, ✓ ~~~States that the same processes that operate today have operated over long periods
with steady incremental change to shape the geology of our planet. Plate tectonics is an
example of one of those processes.
This theory states that changes in the earth's crust during geological history have
resulted from the action of continuous and uniform processes.
Metabolic Rate
✓ ~~~In endotherms, this can change based on age, sex, size, activity level, time of day,
among other factors. Most terrestrial animals have a ______ that is 2 to 4 times their body
mass index.
catalyst
✓ ~~~Adding a _______ to a reaction in equilibrium does not disturb the equilibrium point.
catalyst
✓ ~~~A ________ speeds up the rate at which a reaction reaches dynamic equilibrium and
is added to a reaction primarily as a way to increase reaction rate. No changes in the
products will occur.
catalyst, pressure
✓ ~~~A reaction A(g) + B(g) → 2C(g) is in equilibrium at a certain temperature. The amount
of products cannot be increased by adding a _______ or by increasing ______.
B.
✓ ~~~A(s) + B(g) → C(aq) + heat
For this reaction all of the following will affect the quantities of reactants and products
at equilibrium in a closed vessel EXCEPT:
A. an increase in the volume of reaction vessel
B. addition of a catalyst
,C. increase in pressure
D. increase in temperature
negative, because heat is leaving the system
✓ ~~~Is heat evolved a negative or positive number?
q (heat evolved)
✓ ~~~m (mass) x S (specific heat of water) x ΔT (rise in temp)=
velocity
✓ ~~~s/t (displacement /time)
zero
✓ ~~~If a body goes from A to B and returns from B to A, the total displacement is ______.
Hence, the average velocity is 0 km/h.
Disconformity
✓ ~~~The surface division between parallel rock strata, indicating interruption of
sedimentation.
Liver
✓ ~~~Responsible for detoxification, plasma protein synthesis, and the decomposition of red
blood cells.
Esophagus, peristalsis
, ✓ ~~~The walls of the ________ are composed of muscles, which move in wave-like
contractions to push food into the stomach. These wave-like contractions are called
________.
Small Intestine
✓ ~~~Its job is to absorb most of the nutrients from what we eat and drink. Velvety tissue
lines the ________, which is divided into the duodenum, jejunum, and ileum.
Dewpoint
✓ ~~~The amount of moisture of the air. The _____ has to cool at a stable pressure in order
to saturate.
Acid
✓ ~~~A compound in which one or more H+ ions are bonded to a negative ion
Permeation Rate
✓ ~~~Rate at which the test chemical passes through the glove material once breakthrough
has occurred and equilibrium is reached. _______ involves absorption of the chemical on
the surface of the glove, diffusion through the glove, and desorption of the chemical on
the inside of the glove.
Bronsten-Lowry Acid and Base
✓ ~~~this type of acid is any species capable of donating a proton; and this base is any
species capable of accepting a proton.
Basaltic
✓ ~~~________ magma has very low viscosity. It flows freely because it has low silica
content.
Arrhenius
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