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Test your basic knowledge |
Praxis General Science
Start Test
Study First
Subjects
:
praxis
,
science
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. P1/T1=P2/T2. States that the pressure of a fixed amount of gas in a fixed volume is proportional to its temperature.
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2. Is an atom that has all of its electrons in the lowest possible energy levels
Covalent Bonds
Stable electron arrangement
Latent heat
Laws of thermodynamic / Laws of conservation
3. Rotate at very high speed in order to separate the liquids from the solids. The more dense part of the solution will sediment at the bottom of the test tube. while the lighter material will stay on top. Ex. centrifuge is used to separate blood from b
Centrifuge
Nuclear fission
Parallel Circut
Dynamics
4. The mechanical energy that a body has by virtue of its motion - energy of a moving object.
OHMS
Kinetic energy
Bernoulli principle
Protons
5. A wave in which the particles move parallel to the path of the wave
Longitudinal Waves
Avogadros hypothesis
Compound machines
Nucleus
6. A heat that required to change (water from liquid to solid) from one state to another.
Thermal equilibrium
Heat latent
Electrons
Convection
7. 1/1000 the base unit
Milli
Kilo
Heat latent
Kinetic Friction
8. A circut with two or more resistors where the electricity has more than one path to travel
Isotopes
Applications of Archimedes principle
Parallel Circut
Archimedes principle
9. Organic molecules that are composed of only carbon and hydrogen.
Hydrocarbons
Conduction
Laws of thermodynamic / Laws of conservation
Convection
10. According to some scientists - the Earth's average surface temperature is rising as a result of the greenhouse effect. An increase in the atmospheric concentration of which of the following gases is considered to be primarily responsible
Carbon Dioxide
types of nuclear reactions?
Series circut
The presence of cells in the sample
11. States that when 2 objects collide in an isolated system the total momentum of 2 objects after the collision. That is the momentum gained by object.
Law of momentum conservation
Longitudinal Waves
sulfhydryl group (Functional Group)
64.0 grams
12. Solutes that have bonds; no electrically charged species are created when they dissolve in water; glucose; lipids; urea
types of particles in the nucleus?
Direct Variations
Catalysts
Non - electrolytes
13. A functional group consisting of a sulfur atom bonded to a hydrogen atom (
sulfhydryl group (Functional Group)
Constructive interference
Bernoulli principle
Insulin
14. Is the transfer of heat with no actual transfer of matter. Ex. Iron pan of flame.
Specific gravity
Isotopes
Conduction
What are the 2 most common encountered forms of energy are
15. Meter is the base unit of...
Compound machines
maximum number of electrons that an atom holds with one energy level
Length
Electricity charged objects share these characteristics (3)
16. Finding that a solution conducts an electric current shows conclusively that the solution...
Isotopes
Contains ions
Boyles law states
Charles law
17. Discovered in the late 1800s that micro organisms play a casual role in onset of a disease
Louis Pasteur
OHMS
Alkali metals are
Conduction
18. The speed of light changes in different materials this is due to__
Archimedes principle
The electromagnetic spectrum
Refraction
Inertia & circular motion
19. The molecular weight of a substance expressed in grams - measures the amount of a substance
Hydrophobic
Mole
Neutrons
Magnetic field
20. Most directly involved with controlling levels of sugar in blood
Insulin
Types of potential energy?
Circut
electroscope
21. F - branch of chemistry that deals with the chemical action of electricity and the production of electricity by chemical reactions
Circut
Atomic mass
Electrochemistry
true of hurricanes but not of tornadoes
22. The region around a magnet where the magnetic force is exerted
Calorimeter
Magnetic field
Ions are
Hydrophobic
23. Solids - gasses - and 1 liquid (Bromine)
Non - metals
Energy
Deci
newtons first law of motion
24. 'An object at rest will remain at rest - and an object moving at a constant velocity will continue moving at a constant velocity - unless it is acted upon by an unbalanced force.' Another name is Law of Inertia
Potential energy
Ionic Bonds
the mass number of an atom
newtons first law of motion
25. Experiments may not be done on...
64.0 grams
Grounding Charge
birds
Nuclear Fusion
26. Elements in the middle of the periodic table - in groups 3-12.
Transition elements
Radiation
Latent heat
Potential energy
27. (physics) the capacity of a physical system to do work - or supply heat.
Linear acceleration
Chemical reactions
Mass
Energy
28. Which of the following parts of the Sun is easily visible only during a total solar eclipse
Corona
Kilo
Silicon
Energy
29. Number of protons
Electricity charged objects share these characteristics (3)
Latent heat
Composition reaction
Atomic number
30. The amount of energy required for the liquid at its boiling point to become a gas
Kinetic Friction
Heat vaporization
The true length of a block of wood is 1.010 cm. Three measurements of this block produced the following values: 1.4 cm - 1.2 cm - and 0.9 cm. Which of the following statements is true concerning these measurements?
Heat transfer
31. Describes the force of friction of 2 surfaces in contact with eachother . When there is relative motion between the surface.
Nuclear reaction
Kinetic Friction
When light hits a smooth surface
Direct Variations
32. Uses electrical charges of molecules to separate them according to their size the molecules such as DNA or proteins - are pulled through a gel towards either the positive end of the gel box.
sulfhydryl group (Functional Group)
Electrophoresis
Atomic mass
Mass
33. A carbon atom linked by a double bond to an oxygen atom. - c=o.
Carbonyl Group (Functional Group)
Condensation
types of nuclear reactions?
When a light hits a rough surface
34. An isotope has a different number of...
Neutrons
Physical properties of Meralliods
Atomic number
Pull of gravity
35. The more energy the electrons have
The higher the voltage
Group 2 on the periodic table
Types of potential energy?
same
36. Causes motion
Archimedes principle
Force
Louis Pasteur
Kinetic Molecular theory
37. The volume of a gas is directly proportional to the temperature of a gas
Charles law
electrostatics
conducted more easily
Composition reaction
38. An electric circut with a single path
Series circut
Parallel Circut
Atom
Kilo - calorie
39. Do not have molecules with one of the two molecular arrangements required to give an odor
Nuclear energy
Some substances have no noticeable odor because these substances
Hydrocarbons
Neutrons
40. Change the chemical composition of a material - Computers can be made small enough to fit inside a plastic credit card - resistors are used to regulate volume on television or radio -
Heat conduction
Neutrons
Some Uses of electricity
Catalysts
41. Shiny - softer & less dense. Mostly chemically active
Electrochemistry
sulfhydryl group (Functional Group)
Alkali metals are
Latent heat
42. A principle that states that for every action there is an equal reaction in the opposite direction
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43. Uses the transfer of heat from one substance to another to determine the specific heat of the substance.
The true length of a block of wood is 1.010 cm. Three measurements of this block produced the following values: 1.4 cm - 1.2 cm - and 0.9 cm. Which of the following statements is true concerning these measurements?
Calorimeter
Deca
Constructive interference
44. Higher because it has higher apparent frequency.
Chordates
As the train approaches and blasts its whistle - the whistle sounds..
types of particles in the nucleus?
Forces on objects at rest
45. Inertia is the tendency of any object to resist change in motion. An object at rest tends to stay at rest. An object that is moving tends to keep moving.
Forces on a moving object
Covalent Bonds
Metalloids
Electricity charged objects share these characteristics (3)
46. A compound of which a relatively small amount of the dissolved solute exists as ions in an aqueous solution. Example: Acetic acid - CH3COOH (vinegar)
As the train approaches and blasts its whistle - the whistle sounds..
Neutrons
Weak Electrolytes
Force
47. Mass of the substance contained per unit of volume
Electrochemistry
Nuclear energy
Hydrocarbons
Density
48. It is the first element in group 13 - is a poor conductor of electricity at low temperature - however if temperature increases it will become a good conductor.
The higher the voltage
Types of Friction & Resistance
electroscope
Boron
49. Friction opposes the motion of one surface past another - Friction is common when slowing down a car or sledding down a hill.
Calorie
Deca
Composition reaction
Rubbing
50. The property of sound that varies with variation in the frequency of vibration.
What are the 2 most common encountered forms of energy are
Buret
Pitch
Newton's 3rd law motion