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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. Change from gas to liquid
Hydrophilic
What are the 2 most common encountered forms of energy are
Work
Condensation
2. The state of two or more objects or substances in thermal contact when they have reached a common temperature - EX. the affects after a hot cup of coffee meeting the desk temperature.
Chromatography
Chemical reactions
Pitch
Thermal equilibrium
3. A principle that states that for every action there is an equal reaction in the opposite direction
4. 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
Chromatography
Milli
Density
Electricity charged objects share these characteristics (3)
5. The amount of energy that it takes to raise one gram of water one degree celsius.
The presence of cells in the sample
On the periodic table which elements are grouped by color
Carbonyl Group (Functional Group)
Calorie
6. Several vehicles - initially at a complete stop - begin a long race at the same starting point. The vehicle that has a constant value for which of the following is most likely to win?
Magnetic domains
Series circut
Linear acceleration
What are the 2 most common encountered forms of energy are
7. Electrons in the outermost energy level; they are involved in bond formation
Catalysts
Valence electrons
true of hurricanes but not of tornadoes
Semi - conductors
8. Negatively charged particles found outside the nucleus
Weight
Exothermic
Electrons
Venturi effect
9. Substance that dissociates completely into its ions when added to water and conducts electricity well.
Strong electrolytes
Boyles law states
Heat transfer
Potential energy
10. 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.
Kelvin
Forces on a moving object
Metalloids
Radioactive Particles
11. A temperature scale with the freezing point of water 32 degrees and the boiling point of 212 degrees.
Semi - conductors
Exothermic
Fahrenheit
chemically active
12. Specific gravity is the ratio based on...
Density
Centrifuge
Phosphate group
Bernoulli principle
13. Is the path along which electrons flow
Chordates
When a light hits a rough surface
Thermal equilibrium
Circut
14. The principle of conservation of energy: Energy can be transferred and transformed - but it cannot be created or destroyed.
electroscope
Atomic number
First law of thermodynamics
Potential energy
15. Used in electrical devices that have to function at temperatures too high for metals.
Chemical bond
Semi - conductors
Push & Pull
Latent heat
16. The speed of light changes in different materials this is due to__
What are the 2 most common encountered forms of energy are
Pitch
Density
Refraction
17. 1/10 the base unit
The tilt of the Earth's axis of rotation relative to the ecliptic
Deci
First law of thermodynamics
Carbon Dioxide
18. Pressure is measures in a unit called
Electrochemistry
Pascal
Applications of Archimedes principle
Pasteur's postulate
19. Making and breaking of chemical bonds between atoms bonds involve only the outer electrons & do not effect the nucleus
Radioactive Particles
Pasteur's postulate
Chemical reactions
Metalloids
20. 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.
Bernoulli principle
Hydrophobic
Heat
Laws of thermodynamic / Laws of conservation
21. Equal volumes of gases at the same temperature and pressure contain equal numbers of particles
Atomic number
Magnetic domains
Avogadros hypothesis
conducted more easily
22. Carbon atom - atomic number 6 - atomic mass 11
Heat transfer
oscilloscope
isotopes of each other
Heat Fusion
23. Experiments may not be done on...
Spectrophotometry
Halogens
Insulin
birds
24. Average mass of various isotopes of the element.
Energy
Constructive interference
Atomic mass
Radioactive Particles
25. The ability of the material to oppose the flow of electrons through it all
Weak Electrolytes
Valence electrons
Resistance
Hecto
26. All processes cease when temperature approaches 0.
Types of kinetic energy?
3rd law of thermodynamics
Covalent Bonds
Isotopes
27. Discovered in the late 1800s that micro organisms play a casual role in onset of a disease
Louis Pasteur
Composition reaction
Atomic number
Stable electron arrangement
28. Atoms with an equal # of protons and electrons.
Ions are
Laws of thermodynamic / Laws of conservation
Boyles law states
types of particles in the nucleus?
29. 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
30. When force is applied to an object it moves in a straight line and adding force can make it go faster or slow down.
Straight line motion
Heat transfer
Rubbing
Convection
31. Small uncharged particles in the nucleus they are neutral
Contains ions
Corona
Hydrophobic
Neutrons
32. Is a simple device used to indicate the existence of a positive or negative charge.
Contains ions
electroscope
Longitudinal Waves
types of particles in the nucleus?
33. Uses percent light absorbance to measure a color change - thus giving qualitative data using quantitative value - measures light intensity as a function of color - or more specifically - the wavelength of light.
Nuclear energy
Destructive interference
Spectrophotometry
An electromagnet can be made more powerful in 3 ways
34. The object is further than one focal length from the lens
Destructive interference
Pascal
A converging lens produces a real image when
Electrochemistry
35. A compound of which a relatively small amount of the dissolved solute exists as ions in an aqueous solution. Example: Acetic acid - CH3COOH (vinegar)
Compound machines
Black
Weak Electrolytes
The higher the voltage
36. An isotope has a different number of...
Condensation
Forces on objects at rest
Kelvin
Neutrons
37. 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.
Electrophoresis
same
The tilt of the Earth's axis of rotation relative to the ecliptic
What are the 2 most common encountered forms of energy are
38. 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.
Types of Friction & Resistance
Transition elements
Law of momentum conservation
circut types
39. When measuring the volume of water in a graduated cylinder where does one read the measurement?
At the bottom of the meniscus curve
potential energy
circut types
Parallel Circut
40. A heat that required to change (water from liquid to solid) from one state to another.
Heat transfer
Straight line motion
Heat latent
Nuclear reaction
41. Resistance is measured in...
OHMS
Group 2 on the periodic table
Hydroxyl group ( Functional group)
Contains ions
42. ______ of an atom is equal to the # of protons plus the # of protons plus the # of neutrons
Atomic mass
Forces on a moving object
Group 2 on the periodic table
Entropy
43. Group 17; contains nonmetals; 7 electrons in its outermost energy level; very reactive; poor conductors of electric current; never in its uncombined form in nature; combine with most metals to form salts
Halogens
Mass
Electrons
Refraction
44. Uses sound waves to locate objects and is especially useful underwater the sound waves bounce off the object and are used to assist in location
Condensation
Newtons 2nd law of motion
Sonar technology
Corona
45. Two or more simple machines working together EX. wheelbarrow it uses level - wheel & axle.
Insulin
OHMS
Compound machines
Applications of Archimedes principle
46. Heat energy that is transferred into or out of a system
Chordates
Heat transfer
Corona
Work
47. The amount of energy required to change a substance from the solid phase to the liquid phase at its melting point
Heat Fusion
Kelvin
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?
Alkali metals are
48. Meter is the base unit of...
Length
OHMS
Seismographs
Chordates
49. The acceleration of an object depends on the mass of the object and the amount of force applied.
potential energy
Forces on a moving object
circut types
Newtons 2nd law of motion
50. Shiny - softer & less dense. Mostly chemically active
Semi - conductors
Pasteur's postulate
Alkali metals are
Thermal contact