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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. 10x the base unit
Pascal
Some substances have no noticeable odor because these substances
Deca
Kinetic energy
2. Mass & weight are not the ____ quality
2nd law of thermodynamics
Catalysts
same
As the train approaches and blasts its whistle - the whistle sounds..
3. It is the first element in group 13 - is a poor conductor of electricity at low temperature - however if temperature increases it will become a good conductor.
Hecto
Evaporation
Boron
Some substances have no noticeable odor because these substances
4. 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.
Physical properties of Meralliods
The presence of cells in the sample
What are the 2 most common encountered forms of energy are
Spectrophotometry
5. Mass of the substance contained per unit of volume
Group 2 on the periodic table
OHMS
Radiation
Density
6. 1. Constructive 2. Destructive
Mass number
Circut
alloy
Two types of wave interference are (sound related)
7. (physics) the capacity of a physical system to do work - or supply heat.
Energy
2nd law of thermodynamics
Potential energy
Power
8. Is formed when 2 atoms share electrons - covalent bonding happens among non - metals.
Non - metals
Covalent Bonds
Non - metal
Nuclear Fusion
9. Nuclear fission - Nuclear Fusion
Force
types of nuclear reactions?
Venturi effect
Thermal equilibrium
10. The center of the atom.
Length
Types of kinetic energy?
Nucleus
Decomposition reaction
11. Electrical - Light (radiant) - Heat (thermal) - Movement
Convection
Hydrophobic
Types of kinetic energy?
Energy
12. Which of the following parts of the Sun is easily visible only during a total solar eclipse
Conduction
Corona
Carbon Dioxide
Doppler effect
13. Heat transferred by direct contact
Simple machines
Non - metal
Single replacement reaction
Conduction
14. Polar molecules
Hydrophilic
Dynamics
The higher the voltage
Density
15. Measure of the earth's pull
Exothermic
Law of momentum conservation
OHMS law
Weight
16. Do not have molecules with one of the two molecular arrangements required to give an odor
Heat is transferred in 3 ways
The presence of cells in the sample
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?
Some substances have no noticeable odor because these substances
17. Stored mechanical - Nuclear - Chemical - gravitational
Types of potential energy?
Louis Pasteur
Transverse Waves
Some Uses of electricity
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
Calorie
Weight
Types of potential energy?
Latent heat
19. 2 or more substances combine to form a compound EX. A+B -> AB
Mole
Electrochemistry
Composition reaction
Boron
20. A functional group consisting of a phosphorus atom covalently bonded to four oxygen atoms. Ideal for energy transfer reactions (ATP).
Conduction
Heat vaporization
Isotopes
Phosphate group
21. Liter is the base unit of...
Grounding Charge
Boron
Types of potential energy?
Volume
22. Uses the transfer of heat from one substance to another to determine the specific heat of the substance.
Calorimeter
Chemical bond
Grounding Charge
The electromagnetic spectrum
23. 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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24. Is the change from liquid to gas.
Evaporation
Radiation
Heat is transferred in 3 ways
Load & switch
25. The branch of physics that deals with static electricity - study of stationary electric charges.
The presence of cells in the sample
electrostatics
Kilo
Chemical properties of metalliods
26. Metal - nonmetals - & metalliods
Radiation
Alkaline earth metals are
Lewis dot structures
On the periodic table which elements are grouped by color
27. A functional group consisting of a sulfur atom bonded to a hydrogen atom (
sulfhydryl group (Functional Group)
Weak Electrolytes
Protons
As the train approaches and blasts its whistle - the whistle sounds..
28. 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
Bernoulli principle
Sonar technology
birds
Power
29. The amount of heat it takes to change a solid to a liquid
Non - electrolytes
Kinetic energy
Heat transfer
Latent heat
30. Atoms with an equal # of protons and electrons.
Insulator
Alkaline earth metals are
Ions are
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
31. Organic molecules that are composed of only carbon and hydrogen.
Transverse Waves
Hydrocarbons
Forces on objects at rest
First law of thermodynamics
32. 1. Like charges repel one another - 2. Opposite charges attract each other - 3. charge is considered a neutral object has no net charge.
Magnetic field
Inside the nucleus
First law of thermodynamics
Electricity charged objects share these characteristics (3)
33. The theory that all matter is composed of particles (atoms and molecules) moving constantly in random directions
Kinetic Molecular theory
Ampmeter
Weak Electrolytes
Stable electron arrangement
34. Parts of 2 compounds replace each other. Ex. Switch partners AX + BY -> AY + BX
Alkaline earth metals are
Double replacement Reactions
Push & Pull
Load & switch
35. The relationship between voltage - current - and resistance - V=IR
sulfhydryl group (Functional Group)
OHMS law
Types of potential energy?
Hydrophobic
36. An electric circut with a single path
Series circut
Inside the nucleus
Hydrocarbons
OHMS
37. 8 electrons
Energy
Heat is transferred in 3 ways
Catalysts
maximum number of electrons that an atom holds with one energy level
38. The total entropy of a system plus that of its surroundings always increase.
Chromatography
Heat Fusion
2nd law of thermodynamics
Circut
39. The process of heat transfer via solid contact
Heat conduction
OHMS law
Refraction
Constructive interference
40. 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.
Protons
Thermal equilibrium
Longitudinal Waves
circut types
41. Equal volumes of gases at the same temperature and pressure contain equal numbers of particles
Physical properties of Meralliods
Avogadros hypothesis
Mass
OHMS law
42. 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.
Physical properties of Meralliods
Grounding Charge
Constructive interference
Fahrenheit
43. The property of sound that varies with variation in the frequency of vibration.
Electricity charged objects share these characteristics (3)
Pitch
3rd law of thermodynamics
Black
44. Static friction - Kinetic friction - Push & pull - rubbing - pull of gravity - forces on objects at rest - forces on a moving object - inertia & circular motion.
Types of Friction & Resistance
Avogadros hypothesis
Thermal contact
Atomic number
45. Change in the apparent frequency of a wave as observer and source move toward or away from each other
Physical properties of Meralliods
Doppler effect
Non - electrolytes
Fahrenheit
46. Lacking affinity for water. Repels water. Non - polar
Calorie
Hydrophobic
Semi - conductors
Potential energy
47. Resistance is measured in...
OHMS
2nd law of thermodynamics
Exothermic
true of hurricanes but not of tornadoes
48. Solutes that have bonds; no electrically charged species are created when they dissolve in water; glucose; lipids; urea
sulfhydryl group (Functional Group)
The higher the voltage
Halogens
Non - electrolytes
49. The number of electrons per second that flow past a point in a circut.
Refraction
Current
Boron
The electromagnetic spectrum
50. 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
Venturi effect
Non - metal
Electrochemistry