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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. Solid has a definite shape and volume - Liquid has definite volume - but no shape - Gas has no shape of volume.
Dynamics
Phases of matter
Neutrons
Types of Friction & Resistance
2. Current is measured with a device called...
Ampmeter
newtons first law of motion
OHMS law
Insulator
3. Small uncharged particles in the nucleus they are neutral
Chordates
Eyeglasses are ____ so the image will hit the retina
Stable electron arrangement
Neutrons
4. Clustered regions of aligned magnetic atoms. When these regions are aligned with one another - the substance containing them is a magnet.
Heat vaporization
Weak Electrolytes
The electromagnetic spectrum
Magnetic domains
5. Atoms of the same element that have different numbers of neutrons
When light hits a smooth surface
Isotopes
Exothermic
Atomic number
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.
oscilloscope
Physical properties of Meralliods
conducted more easily
Load & switch
7. The device (bell or Build) is an example of a load. A load is a device that uses energy.
Silicon
Load & switch
Composition reaction
Static friction
8. 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
the mass number of an atom
Ampmeter
Water
Kilo - calorie
9. F - branch of chemistry that deals with the chemical action of electricity and the production of electricity by chemical reactions
Charles law
Electrochemistry
Latent heat
Protons
10. Electrical - Light (radiant) - Heat (thermal) - Movement
Density
Types of kinetic energy?
Kelvin
Types of potential energy?
11. The theory that all matter is composed of particles (atoms and molecules) moving constantly in random directions
Alkaline earth metals are
Mass number
Kinetic Molecular theory
Louis Pasteur
12. 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 energy
maximum number of electrons that an atom holds with one energy level
Nucleus
13. 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.
Group 1 on the periodic table are all
Laws of thermodynamic / Laws of conservation
Spectrophotometry
Heat transfer
14. They are neither precise nor accurate.
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?
First law of thermodynamics
Charles law
Newtons 2nd law of motion
15. Excess energy is released into the environment
alloy
Phosphate group
Types of potential energy?
Exothermic
16. The property of sound that varies with variation in the frequency of vibration.
Newton's 3rd law motion
Inertia & circular motion
Pitch
Constructive interference
17. Removal of static electricity by conduction
Nuclear fission
Charles law
Grounding Charge
Mass
18. Non - metals - group 18 - the most non - reactive elements
Calorimeter
Noble gasses
isotopes of each other
Kelvin
19. It is second element in group 14 - semi - conductor. Sand is made of silicon - it is also used to manufacture glass and cement.
Types of Friction & Resistance
Halogens
Silicon
The presence of cells in the sample
20. Equal volumes of gases at the same temperature and pressure contain equal numbers of particles
Chemical bond
Insulator
Avogadros hypothesis
alloy
21. Carbon atom - atomic number 6 - atomic mass 11
Catalysts
Series circut
The intensity of sound is measured in
isotopes of each other
22. Polar molecules
Types of potential energy?
Condensation
Potential difference
Hydrophilic
23. A functional group consisting of a phosphorus atom covalently bonded to four oxygen atoms. Ideal for energy transfer reactions (ATP).
Water
Phosphate group
Metalloids
Ions are
24. The amount of heat it takes to change a solid to a liquid
Latent heat
Celsius
Nuclear Fusion
Group 2 on the periodic table
25. 1. Like charges repel one another - 2. Opposite charges attract each other - 3. charge is considered a neutral object has no net charge.
Avogadros hypothesis
Electricity charged objects share these characteristics (3)
What are the 2 most common encountered forms of energy are
Potential energy
26. 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.
Neutrons
true of hurricanes but not of tornadoes
Electrophoresis
Load & switch
27. Alkali Metals are the most _____________
chemically active
Boron
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
Inside the nucleus
28. The molecular weight of a substance expressed in grams - measures the amount of a substance
Length
Kilo - calorie
Mole
Law of momentum conservation
29. 1. Constructive 2. Destructive
Two types of wave interference are (sound related)
Double replacement Reactions
As the train approaches and blasts its whistle - the whistle sounds..
Types of potential energy?
30. 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.
Thermal equilibrium
maximum number of electrons that an atom holds with one energy level
Longitudinal Waves
Kilo
31. Number of protons
Single replacement reaction
Exothermic
Atomic number
Some Uses of electricity
32. 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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33. 1.) Protons 2.) Neutrons - They both have the same mass - but neutrons have no mass.
types of particles in the nucleus?
Insulator
Pitch
Some Uses of electricity
34. # of protons + # of neutrons
Atomic mass
Law of momentum conservation
Non - electrolytes
Mass number
35. 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?
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?
OHMS law
Alkali metals are
The presence of cells in the sample
36. Most directly involved with controlling levels of sugar in blood
First law of thermodynamics
Insulin
Seismographs
Conduction
37. Friction opposes the motion of one surface past another - Friction is common when slowing down a car or sledding down a hill.
Physical properties of Meralliods
Excited electrons
Rubbing
Inside the nucleus
38. 1. Make more coils - 2. put an iron cover (nail) inside the coils - use more battery power
Heat vaporization
An electromagnet can be made more powerful in 3 ways
Pull of gravity
Circut
39. What quantity of oxygen - O2 - contains very nearly the same number of molecules as 36.0 grams of water - H2O?
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?
64.0 grams
Ions are
Hydrocarbons
40. An isotope has a different number of...
oscilloscope
Neutrons
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?
Chemical bond
41. The number of electrons per second that flow past a point in a circut.
Transverse Waves
The intensity of sound is measured in
Current
Nucleus
42. The sum of the protons and neutrons
Ampmeter
Chemical reactions
the mass number of an atom
Physical properties of Meralliods
43. 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
Radiation
Destructive interference
Group 2 on the periodic table
Latent heat
44. 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
Static friction
Chordates
Types of Friction & Resistance
45. Organic molecules that are composed of only carbon and hydrogen.
Hydrocarbons
Kinetic Molecular theory
newtons first law of motion
true of hurricanes but not of tornadoes
46. The total entropy of a system plus that of its surroundings always increase.
Exothermic
Corona
2nd law of thermodynamics
Force
47. A boulder is sitting at the edge of the cliff it has which type of energy?
Double replacement Reactions
Potential energy
The tilt of the Earth's axis of rotation relative to the ecliptic
Nuclear fission
48. Is the transfer of heat with no actual transfer of matter. Ex. Iron pan of flame.
true of hurricanes but not of tornadoes
Conduction
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
Charles law
49. Ratio of the density of a substance to the density of water
Hydrophobic
Compound machines
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
Specific gravity
50. 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?
Difference between metals & non - metals
Linear acceleration
Boyles law states
Chordates