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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. (of a chemical reaction or compound) occurring or formed with absorption of heat. Absorbs energy from its surroundings.
Endothermic
Constructive interference
Alkaline earth metals are
Series circut
2. Discovered in the late 1800s that micro organisms play a casual role in onset of a disease
Louis Pasteur
Mass number
Excited electrons
Isotopes
3. Symmetry - crystalline structures are universal - Crystallographic defects - Electrical properties - crystal system
Some characteristics of crystals
Pasteur's postulate
Entropy
Hydroxyl group ( Functional group)
4. A nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy
Nuclear fission
Electrophoresis
chemically active
Latent heat
5. (physics and chemistry) the smallest component of an element having the chemical properties of the element
Atom
Latent heat
Nuclear reaction
Density
6. Which of the following parts of the Sun is easily visible only during a total solar eclipse
Radiation
Archimedes principle
Lewis dot structures
Corona
7. Potential & Kinetic
What are the 2 most common encountered forms of energy are
Endothermic
3rd law of thermodynamics
Physical properties of Meralliods
8. Nuclear fission - Nuclear Fusion
Calorimeter
Atomic mass
types of nuclear reactions?
2nd law of thermodynamics
9. Where are protons an neutrons located?
Insulin
Inside the nucleus
Milli
Two types of wave interference are (sound related)
10. Is the transfer of heat with no actual transfer of matter. Ex. Iron pan of flame.
Heat
Spectrophotometry
The electromagnetic spectrum
Conduction
11. Metric unit for measuring temperature; On this scale water freezes at zero and boils at 100.
Physical properties of Meralliods
electroscope
Destructive interference
Celsius
12. 1. Liquid crystals - when certain solids melt their crystal lattices disintegrate & their particles lose their 3- dimensional pattern. 2. Solid - as a liquid substance cools & forms a solid. The strong attractive forces between oppositely charges ion
Grounding Charge
alloy
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
Alkali metals are
13. Finding that a solution conducts an electric current shows conclusively that the solution...
Contains ions
The electromagnetic spectrum
Resistance
Corona
14. 1. Have some characteristics of metals & non - metals. 2. Properties do not follow patterns like metals & non - metals.
Electricity charged objects share these characteristics (3)
Heat transfer
Milli
Chemical properties of metalliods
15. A functional group consisting of a sulfur atom bonded to a hydrogen atom (
sulfhydryl group (Functional Group)
Load & switch
Black
Law of momentum conservation
16. When force is applied to an object it moves in a straight line and adding force can make it go faster or slow down.
Grounding Charge
Electrochemistry
The higher the voltage
Straight line motion
17. Is the work done divided by the amount of the time it took to do it. P= w/t
Power
Heat vaporization
Atomic number
Deci
18. Harder - denser - have higher melting points & are chemically active.
Constructive interference
Corona
Alkaline earth metals are
Transition elements
19. That for a fixed amount of gas at a constant temperature - the volume of a gas increases as its pressure decreases
Boyles law states
Centrifuge
Venturi effect
oscilloscope
20. Submarines - diving weighting system - naval architecture - Flotation - Buoyancy compensator
conducted more easily
Applications of Archimedes principle
Some substances have no noticeable odor because these substances
Some characteristics of crystals
21. Inclined plane - lever - wheel & axle - pulley.
Chemical bond
Inside the nucleus
Some characteristics of crystals
Simple machines
22. Describes the force of friction of 2 surfaces that are in contact but do not have any motion relative to eachother.
Transverse Waves
Kilo
Static friction
Ionic Bonds
23. The volume of a gas is directly proportional to the temperature of a gas
Atomic mass
Heat vaporization
Charles law
Direct Variations
24. Do not have molecules with one of the two molecular arrangements required to give an odor
Bernoulli principle
Some substances have no noticeable odor because these substances
Seismographs
Electricity charged objects share these characteristics (3)
25. 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 -
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
chemically active
Corona
Some Uses of electricity
26. The acceleration of an object depends on the mass of the object and the amount of force applied.
Two types of wave interference are (sound related)
Condensation
The tilt of the Earth's axis of rotation relative to the ecliptic
Newtons 2nd law of motion
27. 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
Celsius
Kilo - calorie
Phosphate group
28. The region around a magnet where the magnetic force is exerted
Straight line motion
Potential energy
Nuclear energy
Magnetic field
29. Excess energy is released into the environment
Exothermic
Hecto
Ions are
Spectrophotometry
30. Atoms with an equal # of protons and electrons.
Mass
Difference between metals & non - metals
Ions are
Chemical reactions
31. The interference that occurs when two waves combine to make a wave with a smaller amplitude
Destructive interference
Load & switch
Centrifuge
Boron
32. Electrons that can accept energy from outside sources and move farther away from the nucleus
Weight
Excited electrons
2nd law of thermodynamics
The intensity of sound is measured in
33. Reflects the light in one direction
Silicon
Protons
Doppler effect
When light hits a smooth surface
34. The mechanical energy that a body has by virtue of its position Ex. Stored energy -
Hecto
potential energy
Some substances have no noticeable odor because these substances
Static friction
35. As the velocity of a fluid increases - the pressure exerted by the fluid decreases - The speed of a fluid - liquid - gas - increases the pressure exerts.
As the train approaches and blasts its whistle - the whistle sounds..
Composition reaction
Neutrons
Bernoulli principle
36. A unit of heat equal to the amount of heat required to raise the temperature of one kilogram of water by one degree at one atmosphere pressure. used by nutritionists to characterize the energy - producing potential in food
Kilo - calorie
Magnetic field
Spectrophotometry
Heat is transferred in 3 ways
37. The ability of the material to oppose the flow of electrons through it all
Phases of matter
At the bottom of the meniscus curve
During ____ elements change into other elements change into other elements called _____ elements.
Resistance
38. Change in the apparent frequency of a wave as observer and source move toward or away from each other
Fahrenheit
Applications of Archimedes principle
Doppler effect
Sonar technology
39. Measures the amount of matter in an object
Mass
Exothermic
Some characteristics of crystals
Lewis dot structures
40. 8 electrons
Alkaline earth metals are
maximum number of electrons that an atom holds with one energy level
As the train approaches and blasts its whistle - the whistle sounds..
Conduction
41. 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.
potential energy
Radioactive Particles
Forces on objects at rest
Radiation
42. A wave in which the particles move parallel to the path of the wave
Mass
Straight line motion
Longitudinal Waves
Pitch
43. 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
OHMS law
Kinetic Friction
Forces on objects at rest
Chromatography
44. The same pathogen must be found in every person with the same disease - the pathogen must be isolated & grown in a culture - when the organism is re - introduced in an experimental animal - that animal should develop the same disease originally seen
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45. A gelatinous sample of material from a previously unexplored marine environment is thought to be living or to be composed of recently living material. Which of the following would most clearly confirm that the material has a biological origin?
alloy
Types of potential energy?
The presence of cells in the sample
On the periodic table which elements are grouped by color
46. Solid has a definite shape and volume - Liquid has definite volume - but no shape - Gas has no shape of volume.
Direct Variations
Simple machines
Phases of matter
Group 2 on the periodic table
47. A principle that states that for every action there is an equal reaction in the opposite direction
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48. The total entropy of a system plus that of its surroundings always increase.
same
Laws of thermodynamic / Laws of conservation
Mass
2nd law of thermodynamics
49. Lacking affinity for water. Repels water. Non - polar
Bernoulli principle
Volume
Hydrophobic
Electrophoresis
50. Friction opposes the motion of one surface past another - Friction is common when slowing down a car or sledding down a hill.
Single replacement reaction
Push & Pull
Rubbing
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are: