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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. Alkali Metals are the most _____________
Newtons 2nd law of motion
Heat
chemically active
Archimedes principle
2. Reflects the light in one direction
Calorimeter
Doppler effect
Hydrophobic
When light hits a smooth surface
3. The interference that occurs when two waves combine to make a wave with a smaller amplitude
Destructive interference
Hecto
oscilloscope
The presence of cells in the sample
4. '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
newtons first law of motion
When a light hits a rough surface
Latent heat
Types of Friction & Resistance
5. Is the path along which electrons flow
Circut
Double replacement Reactions
Load & switch
Isotopes
6. The relationship between voltage - current - and resistance - V=IR
Electromagnets
Forces on a moving object
conducted more easily
OHMS law
7. Metal - nonmetals - & metalliods
On the periodic table which elements are grouped by color
Silicon
Radiation
Convection
8. 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.
Metalloids
Forces on a moving object
Seismographs
When light hits a smooth surface
9. Excess energy is released into the environment
Ampmeter
Valence electrons
Exothermic
isotopes of each other
10. The property of sound that varies with variation in the frequency of vibration.
Refraction
Exothermic
Pitch
Carbonyl Group (Functional Group)
11. A nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy
Longitudinal Waves
newtons first law of motion
Nuclear Fusion
Eyeglasses are ____ so the image will hit the retina
12. A wave in which the particles move parallel to the path of the wave
Two types of wave interference are (sound related)
Types of Friction & Resistance
Boyles law states
Longitudinal Waves
13. Relates pressure & temp. and temp and volume.
Newtons 2nd law of motion
Direct Variations
Power
The tilt of the Earth's axis of rotation relative to the ecliptic
14. What are the # of protons in the nucleus of an atom called?
Atomic number
Exothermic
Sonar technology
Electromagnets
15. The difference in electrical charge between two points in a circuit expressed in volt. When an electron goes through a load it does work & loses some energy.
Atomic mass
Nuclear energy
newtons first law of motion
Potential difference
16. Lacking affinity for water. Repels water. Non - polar
Thermal contact
Hydrophobic
chemically active
Newton's 3rd law motion
17. Are used in the treatment of cancer b/c they can kill cancer cells. However - if powerful enough they can kill healthy cells.
Electrochemistry
Chemical bond
Valence electrons
Radioactive Particles
18. Concave
Eyeglasses are ____ so the image will hit the retina
Metalloids
Kilo
Pascal
19. Two or more simple machines working together EX. wheelbarrow it uses level - wheel & axle.
Mass number
Atomic mass
Calorie
Compound machines
20. All processes cease when temperature approaches 0.
Nucleus
Atomic mass
3rd law of thermodynamics
Corona
21. Is the change from liquid to gas.
Neutrons
Evaporation
Law of momentum conservation
Noble gasses
22. Transfer of thermal energy with in a fluid. The particles in a fluid transfer the thermal energy from hot areas to cooler areas EX. the warmed up rising air from a heat source such as a fire or electric heater.
Convection
An electromagnet can be made more powerful in 3 ways
Fahrenheit
Group 1 on the periodic table are all
23. The formula F=M/A is a shorthand force equals mass over acceleration. An object will not move unless the force is strong enough to move the mass.
Destructive interference
Kilo - calorie
Kelvin
Forces on objects at rest
24. Parts of 2 compounds replace each other. Ex. Switch partners AX + BY -> AY + BX
Nucleus
Ionic Bonds
Double replacement Reactions
Non - metal
25. Objects are in thermal contact if they can affect each others temperature
Forces on objects at rest
When light hits a smooth and shiny surface
Thermal contact
OHMS
26. Harder - denser - have higher melting points & are chemically active.
Hydrocarbons
Sonar technology
chemically active
Alkaline earth metals are
27. 1000x the base unit
Kilo
2nd law of thermodynamics
Charles law
Radioactive Particles
28. A material such as glass or porcelain with negligible electrical or thermal conductivity. Electric charges do not move easily - if at all.
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
Condensation
Insulator
types of particles in the nucleus?
29. Energy is added to a system one of two things must happen either thermal energy must increase or work must be done.
Calorimeter
Density
Heat Fusion
Laws of thermodynamic / Laws of conservation
30. Solutes that have bonds; no electrically charged species are created when they dissolve in water; glucose; lipids; urea
Non - electrolytes
Kelvin
true of hurricanes but not of tornadoes
Rubbing
31. Polar molecules
Hydrophilic
Carbonyl Group (Functional Group)
Metalloids
Atomic mass
32. Change from gas to liquid
Potential energy
Condensation
Pull of gravity
alloy
33. 1/10 the base unit
Electrochemistry
Transition elements
Excited electrons
Deci
34. Carbon atom - atomic number 6 - atomic mass 11
isotopes of each other
Difference between metals & non - metals
Atom
Chemical bond
35. Heat transferred by fluid current
Celsius
Phosphate group
Nuclear Fusion
Convection
36. Compounds that speed up chemical reactions. Sometimes without Catalysts reactions cant occur.
Latent heat
Catalysts
Circut
Weight
37. The buoyant force on an object is equal to the weight of the fluid displaced by the object
Law of momentum conservation
Archimedes principle
Avogadros hypothesis
Ionic Bonds
38. 100x the base unit
Buret
Hydrophilic
Hecto
Heat is transferred in 3 ways
39. 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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40. The amount of energy required for the liquid at its boiling point to become a gas
Endothermic
Pascal
Black
Heat vaporization
41. The amount of energy required to change a substance from the solid phase to the liquid phase at its melting point
Heat Fusion
Pasteur's postulate
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
Conduction
42. A functional group consisting of a phosphorus atom covalently bonded to four oxygen atoms. Ideal for energy transfer reactions (ATP).
Eyeglasses are ____ so the image will hit the retina
Laws of thermodynamic / Laws of conservation
Heat conduction
Phosphate group
43. Meter is the base unit of...
Charles law
Length
Halogens
Two types of wave interference are (sound related)
44. Clustered regions of aligned magnetic atoms. When these regions are aligned with one another - the substance containing them is a magnet.
Heat vaporization
Magnetic domains
Double replacement Reactions
Heat conduction
45. Reduction in pressure of a fluid resulting from the speed increase as fluids are forced to flow faster through narrow spaces
When light hits a smooth and shiny surface
Decomposition reaction
Venturi effect
sulfhydryl group (Functional Group)
46. Atoms of the same element that have different numbers of neutrons
Mass
Isotopes
Longitudinal Waves
Ampmeter
47. Uses the principles of capillary action to separate substances such as plant pigments molecules of a larger size will migrate up the paper more quickly produce lines of pigment. - a process used for separating mixtures by virtue of differences in abs
Kilo
Chromatography
Conduction
Linear acceleration
48. It scatters light in many directions
Direct Variations
When a light hits a rough surface
oscilloscope
Static friction
49. 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.
Electrochemistry
Constructive interference
Entropy
Mass
50. Elements in the middle of the periodic table - in groups 3-12.
Transition elements
First law of thermodynamics
Chromatography
Destructive interference