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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. The interference that occurs when two waves combine to make a wave with a smaller amplitude
Corona
Atom
Destructive interference
chemically active
2. When measuring the volume of water in a graduated cylinder where does one read the measurement?
Longitudinal Waves
Work
Inside the nucleus
At the bottom of the meniscus curve
3. Change from gas to liquid
Condensation
Metalloids
An electromagnet can be made more powerful in 3 ways
Destructive interference
4. Is the transfer of energy by waves such as the electromagnetic waves emitted by stars the sun warms the earth by emitting radiant energy.
On the periodic table which elements are grouped by color
Doppler effect
Seismographs
Radiation
5. Atoms of the same element that have different numbers of neutrons
Isotopes
An electromagnet can be made more powerful in 3 ways
Current
Constructive interference
6. 1. All are solids having the appearance of metals & non - metals. 2. All are white or gray - but not shiny 3. Conduct electricity - but not as well as metals.
Heat Fusion
Atomic mass
Physical properties of Meralliods
isotopes of each other
7. Ratio of the density of a substance to the density of water
Specific gravity
Kinetic energy
Phases of matter
Protons
8. (physics) the capacity of a physical system to do work - or supply heat.
Energy
Atom
Inside the nucleus
Length
9. You see your reflection
Electrons
Simple machines
oscilloscope
When light hits a smooth and shiny surface
10. A compound of which a relatively small amount of the dissolved solute exists as ions in an aqueous solution. Example: Acetic acid - CH3COOH (vinegar)
alloy
A converging lens produces a real image when
Weak Electrolytes
Nuclear Fusion
11. 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 -
Phosphate group
Some Uses of electricity
Seismographs
Spectrophotometry
12. The object is further than one focal length from the lens
Charles law
A converging lens produces a real image when
Decomposition reaction
Convection
13. The ability of the material to oppose the flow of electrons through it all
Nucleus
Resistance
Nuclear energy
Grounding Charge
14. Pushing a vacuum cleaner or pulling a bowstring applies muscular force when the muscles expand & contract elastic force occurs when an object returns to its original shape (for example - when a bow is released)
An electromagnet can be made more powerful in 3 ways
Avogadros hypothesis
Push & Pull
Specific gravity
15. Stored mechanical - Nuclear - Chemical - gravitational
Catalysts
Mass number
Atomic number
Types of potential energy?
16. Symmetry - crystalline structures are universal - Crystallographic defects - Electrical properties - crystal system
isotopes of each other
Heat vaporization
circut types
Some characteristics of crystals
17. The mechanical energy that a body has by virtue of its motion - energy of a moving object.
Seismographs
Kinetic energy
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
Water
18. Heat absorbed or radiated during a change of phase at a constant temperature and pressure - the amount of heat required to undergo a phase change
The intensity of sound is measured in
Latent heat
Destructive interference
Kilo
19. Electronic equipment that provides visual images of varying electrical quantities - Useful in studying waves b/c it gives a picture of the wave.
Ampmeter
Protons
oscilloscope
electroscope
20. The principle of conservation of energy: Energy can be transferred and transformed - but it cannot be created or destroyed.
First law of thermodynamics
Law of momentum conservation
Rubbing
Insulin
21. It is second element in group 14 - semi - conductor. Sand is made of silicon - it is also used to manufacture glass and cement.
Pascal
Alkaline earth metals are
Silicon
Decomposition reaction
22. Number of protons
Heat vaporization
Atomic number
Force
OHMS law
23. Energy is added to a system one of two things must happen either thermal energy must increase or work must be done.
Newton's 3rd law motion
Heat vaporization
Group 1 on the periodic table are all
Laws of thermodynamic / Laws of conservation
24. The agent most widely and most consistently at work changing the appearance of the Earth's surface
Convection
Boyles law states
same
Water
25. The centripetal force is provided by the high banking of the curved road & by friction between the wheels & the road.
OHMS
Thermal equilibrium
Conduction
Inertia & circular motion
26. Measures the amount of matter in an object
isotopes of each other
Mass
Entropy
Bernoulli principle
27. Describes the force of friction of 2 surfaces in contact with eachother . When there is relative motion between the surface.
Composition reaction
Potential difference
Compound machines
Kinetic Friction
28. A wave in which the particles of the medium move perpendicularly to the direction the wave is traveling
Transverse Waves
Chordates
Kelvin
Direct Variations
29. Most directly involved with controlling levels of sugar in blood
Heat
Charles law
Insulin
2nd law of thermodynamics
30. '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
Exothermic
newtons first law of motion
Mass
What are the 2 most common encountered forms of energy are
31. A carbon atom linked by a double bond to an oxygen atom. - c=o.
Pull of gravity
Atomic number
Transverse Waves
Carbonyl Group (Functional Group)
32. Measure of the disorder or randomness of the particles that make of a system (measurement of movement of particles in a spontaneous reaction) EX. entropy increases as matter and energy in the universe degrade to an ultimate state of inert uniformity.
Calorie
Entropy
newtons first law of motion
64.0 grams
33. The amount of heat it takes to change a solid to a liquid
Latent heat
circut types
Refraction
Power
34. Heat energy that is transferred into or out of a system
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
When a light hits a rough surface
oscilloscope
35. A boulder is sitting at the edge of the cliff it has which type of energy?
oscilloscope
Chemical bond
Venturi effect
Potential energy
36. 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
sulfhydryl group (Functional Group)
Electrophoresis
electroscope
37. Carbon atom - atomic number 6 - atomic mass 11
When light hits a smooth and shiny surface
isotopes of each other
Insulator
true of hurricanes but not of tornadoes
38. A buret is used to deliver solution in precisely - measured - variable volumes. deliver one reactant until the precise end point of the reaction is reached.
Buret
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
During ____ elements change into other elements change into other elements called _____ elements.
Kelvin
39. Describes the force of friction of 2 surfaces that are in contact but do not have any motion relative to eachother.
Forces on a moving object
Mass number
Static friction
Deca
40. Formed when one or more electrons are transferred from one atom to another. Transfer of electrons happens when metals & non - metals bond.
Double replacement Reactions
Single replacement reaction
Ionic Bonds
Compound machines
41. Specific gravity is the ratio based on...
potential energy
When light hits a smooth and shiny surface
Density
oscilloscope
42. The relationship between voltage - current - and resistance - V=IR
OHMS law
Heat Fusion
Conduction
Destructive interference
43. A piece of paper that appears blue in sunlight is illuminated solely by a red light that is passed through a green filter. What color does the paper appear under this illumination?
Hydrophilic
Black
Chordates
Law of momentum conservation
44. Conduction - Convection - & Radiation
Heat is transferred in 3 ways
Electromagnets
Mass number
Radioactive Particles
45. The number of electrons per second that flow past a point in a circut.
Buret
The presence of cells in the sample
Refraction
Current
46. A nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy
On the periodic table which elements are grouped by color
Nuclear fission
Longitudinal Waves
Nuclear reaction
47. The mechanical energy that a body has by virtue of its position Ex. Stored energy -
potential energy
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
Forces on a moving object
Types of kinetic energy?
48. 1. Make more coils - 2. put an iron cover (nail) inside the coils - use more battery power
Chemical reactions
Silicon
An electromagnet can be made more powerful in 3 ways
Electrochemistry
49. It scatters light in many directions
When a light hits a rough surface
Law of momentum conservation
electroscope
Mass
50. Used in electrical devices that have to function at temperatures too high for metals.
Semi - conductors
Density
Static friction
Physical properties of Meralliods
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