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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. 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
Avogadros hypothesis
Sonar technology
Halogens
2. 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.
Silicon
Non - electrolytes
Spectrophotometry
Single replacement reaction
3. Record vibrations in earth & allow us to measure earthquake activity.
The tilt of the Earth's axis of rotation relative to the ecliptic
Seismographs
Endothermic
Atomic mass
4. Discovered in the late 1800s that micro organisms play a casual role in onset of a disease
Endothermic
Louis Pasteur
true of hurricanes but not of tornadoes
Heat is transferred in 3 ways
5. Alkali metals
Circut
Group 1 on the periodic table are all
Deca
Endothermic
6. 1. Have some characteristics of metals & non - metals. 2. Properties do not follow patterns like metals & non - metals.
Chemical properties of metalliods
Boyles law states
Electrons
Mole
7. Elements in the middle of the periodic table - in groups 3-12.
Transition elements
Latent heat
Refraction
64.0 grams
8. Change in the apparent frequency of a wave as observer and source move toward or away from each other
Deca
isotopes of each other
Two types of wave interference are (sound related)
Doppler effect
9. Used in electrical devices that have to function at temperatures too high for metals.
Eyeglasses are ____ so the image will hit the retina
Heat conduction
Boyles law states
Semi - conductors
10. The agent most widely and most consistently at work changing the appearance of the Earth's surface
Water
Group 2 on the periodic table
Physical properties of Meralliods
Magnetic domains
11. A nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy
Latent heat
When light hits a smooth and shiny surface
Potential difference
Nuclear Fusion
12. It scatters light in many directions
When a light hits a rough surface
Inside the nucleus
Types of kinetic energy?
Inertia & circular motion
13. The amount of energy that it takes to raise one gram of water one degree celsius.
potential energy
Calorie
Covalent Bonds
Mass
14. 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.
Phosphate group
Charles law
Bernoulli principle
Metalloids
15. F - branch of chemistry that deals with the chemical action of electricity and the production of electricity by chemical reactions
Dynamics
alloy
Electrochemistry
sulfhydryl group (Functional Group)
16. Where are protons an neutrons located?
Constructive interference
Nucleus
Circut
Inside the nucleus
17. Resistance is measured in...
Convection
Nuclear Fusion
OHMS
Nuclear fission
18. Objects are in thermal contact if they can affect each others temperature
Kinetic Molecular theory
Straight line motion
Radiation
Thermal contact
19. Energy is added to a system one of two things must happen either thermal energy must increase or work must be done.
What are the 2 most common encountered forms of energy are
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
Pasteur's postulate
Laws of thermodynamic / Laws of conservation
20. The transfer of heat by electromagnetic waves is called?
Radiation
An electromagnet can be made more powerful in 3 ways
Heat Fusion
Kilo - calorie
21. Excess energy is released into the environment
Hydrocarbons
Exothermic
Carbonyl Group (Functional Group)
Law of momentum conservation
22. The device (bell or Build) is an example of a load. A load is a device that uses energy.
Electrophoresis
Conduction
Load & switch
An electromagnet can be made more powerful in 3 ways
23. 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.
Thermal equilibrium
Law of momentum conservation
Forces on a moving object
Exothermic
24. The mechanical energy that a body has by virtue of its position Ex. Stored energy -
potential energy
Difference between metals & non - metals
Charles law
Heat vaporization
25. Potential & Kinetic
What are the 2 most common encountered forms of energy are
Radiation
Energy
Pasteur's postulate
26. Temporary magnets that lose their magnetism when electric current is removed
Heat Fusion
same
Electromagnets
Applications of Archimedes principle
27. A nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy
birds
Nuclear reaction
Atomic mass
Nuclear fission
28. (physics) a process that alters the energy or structure or composition of atomic nuclei - When a reaction involves the nucleus - elements become different thus is called a nuclear reaction.
Hydroxyl group ( Functional group)
Nuclear reaction
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?
Sonar technology
29. 1. Make more coils - 2. put an iron cover (nail) inside the coils - use more battery power
An electromagnet can be made more powerful in 3 ways
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
Kilo
Refraction
30. A carbon atom linked by a double bond to an oxygen atom. - c=o.
Some characteristics of crystals
Carbonyl Group (Functional Group)
Avogadros hypothesis
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
31. Harder - denser - have higher melting points & are chemically active.
Electrophoresis
Rubbing
Grounding Charge
Alkaline earth metals are
32. A buret is used to deliver solution in precisely - measured - variable volumes. deliver one reactant until the precise end point of the reaction is reached.
Heat latent
Boron
Eyeglasses are ____ so the image will hit the retina
Buret
33. A Compound breaks down into 2 or more simpler substances EX. AB -> A+B
Latent heat
Covalent Bonds
Carbon Dioxide
Decomposition reaction
34. Specific gravity is the ratio based on...
Chemical reactions
Density
Latent heat
Load & switch
35. Is a simple device used to indicate the existence of a positive or negative charge.
Boyles law states
electroscope
Latent heat
2nd law of thermodynamics
36. Is the study of the relationship between motion & the forces affecting motion.
Deci
Dynamics
Types of kinetic energy?
Spectrophotometry
37. 1. Constructive 2. Destructive
Two types of wave interference are (sound related)
Double replacement Reactions
Density
Spectrophotometry
38. Substance that dissociates completely into its ions when added to water and conducts electricity well.
Strong electrolytes
Latent heat
Heat is transferred in 3 ways
At the bottom of the meniscus curve
39. A piece of paper that appears blue in sunlight is illuminated solely by a red light that is passed through a green filter. What color does the paper appear under this illumination?
Black
Compound machines
Water
Pasteur's postulate
40. The amount of energy required to change a substance from the solid phase to the liquid phase at its melting point
Heat Fusion
Deca
Forces on objects at rest
newtons first law of motion
41. The mechanical energy that a body has by virtue of its motion - energy of a moving object.
Heat conduction
Forces on a moving object
Kinetic energy
Calorie
42. Measure of the earth's pull
Pasteur's postulate
Weight
Boron
Heat Fusion
43. 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.
true of hurricanes but not of tornadoes
Convection
Destructive interference
Boyles law states
44. Reduction in pressure of a fluid resulting from the speed increase as fluids are forced to flow faster through narrow spaces
Specific gravity
Alkali metals are
Convection
Venturi effect
45. 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.
What are the 2 most common encountered forms of energy are
Electrophoresis
Electromagnets
Seismographs
46. 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.
Forces on objects at rest
Ampmeter
Forces on a moving object
Atom
47. (physics and chemistry) the smallest component of an element having the chemical properties of the element
Atom
Neutrons
Newton's 3rd law motion
Electrophoresis
48. The object is further than one focal length from the lens
Phosphate group
Electrophoresis
2nd law of thermodynamics
A converging lens produces a real image when
49. Solutes that have bonds; no electrically charged species are created when they dissolve in water; glucose; lipids; urea
Non - electrolytes
Density
Pascal
Buret
50. Is the work done divided by the amount of the time it took to do it. P= w/t
Kilo - calorie
Power
Louis Pasteur
Refraction