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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. Causes motion
birds
Force
Evaporation
Metalloids
2. 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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3. The amount of heat it takes to change a solid to a liquid
Chemical bond
Compound machines
The tilt of the Earth's axis of rotation relative to the ecliptic
Latent heat
4. 1/1000 the base unit
Non - metals
Density
Metalloids
Milli
5. A nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy
Volume
Nuclear Fusion
Heat conduction
maximum number of electrons that an atom holds with one energy level
6. A temperature scale with the freezing point of water 32 degrees and the boiling point of 212 degrees.
Heat transfer
Fahrenheit
Non - electrolytes
Neutrons
7. Gram is the base unit of...
Some Uses of electricity
Mass
Eyeglasses are ____ so the image will hit the retina
Series circut
8. Electrical - Light (radiant) - Heat (thermal) - Movement
Density
Convection
Types of kinetic energy?
First law of thermodynamics
9. Pushing a vacuum cleaner or pulling a bowstring applies muscular force when the muscles expand & contract elastic force occurs when an object returns to its original shape (for example - when a bow is released)
Rubbing
Heat conduction
Push & Pull
At the bottom of the meniscus curve
10. Resistance is measured in...
Newton's 3rd law motion
Work
OHMS
Atomic number
11. A mixture containing two or more metallic elements or metallic and nonmetallic elements usually fused together or dissolving into each other when molten Ex. Brass is an alloy of zinc and copper
Covalent Bonds
alloy
Push & Pull
Some Uses of electricity
12. 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 -
Some Uses of electricity
Kilo
Sonar technology
Ionic Bonds
13. Substance that dissociates completely into its ions when added to water and conducts electricity well.
Hydrophilic
Strong electrolytes
Gay - Lussac's Law
sulfhydryl group (Functional Group)
14. A functional group consisting of a phosphorus atom covalently bonded to four oxygen atoms. Ideal for energy transfer reactions (ATP).
Water
Physical properties of Meralliods
Phosphate group
Noble gasses
15. Heat transferred by direct contact
Conduction
OHMS
Law of momentum conservation
Electrochemistry
16. A Compound breaks down into 2 or more simpler substances EX. AB -> A+B
Decomposition reaction
Mole
Pascal
Rubbing
17. Decibels
The intensity of sound is measured in
Newton's 3rd law motion
Eyeglasses are ____ so the image will hit the retina
Halogens
18. Reflects the light in one direction
sulfhydryl group (Functional Group)
As the train approaches and blasts its whistle - the whistle sounds..
When light hits a smooth surface
Volume
19. Is the study of the relationship between motion & the forces affecting motion.
Dynamics
Atomic mass
Charles law
Transition elements
20. Lacking affinity for water. Repels water. Non - polar
Heat Fusion
Hydrophobic
sulfhydryl group (Functional Group)
Deci
21. 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.
Inertia & circular motion
Physical properties of Meralliods
Forces on a moving object
Forces on objects at rest
22. Have properties in between metals and non - metals found in groups 13-16
Ampmeter
Metalloids
Straight line motion
Density
23. A wave in which the particles move parallel to the path of the wave
Longitudinal Waves
Phases of matter
Potential energy
Hecto
24. 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
A converging lens produces a real image when
Sonar technology
Refraction
sulfhydryl group (Functional Group)
25. A wave in which the particles of the medium move perpendicularly to the direction the wave is traveling
Transverse Waves
OHMS law
Doppler effect
The tilt of the Earth's axis of rotation relative to the ecliptic
26. Carbon atom - atomic number 6 - atomic mass 11
isotopes of each other
Density
Nuclear fission
Heat vaporization
27. Excess energy is released into the environment
Exothermic
Chemical reactions
Stable electron arrangement
Constructive interference
28. Relates pressure & temp. and temp and volume.
Nuclear energy
Neutrons
Direct Variations
Fahrenheit
29. Symmetry - crystalline structures are universal - Crystallographic defects - Electrical properties - crystal system
Kilo - calorie
Mass
Nucleus
Some characteristics of crystals
30. Alkali metals
Non - metals
Bernoulli principle
Seismographs
Group 1 on the periodic table are all
31. 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
Convection
Carbonyl Group (Functional Group)
Endothermic
32. The amount of energy required for the liquid at its boiling point to become a gas
Calorie
Stable electron arrangement
Heat vaporization
Mole
33. Solid has a definite shape and volume - Liquid has definite volume - but no shape - Gas has no shape of volume.
Isotopes
Atom
Phases of matter
conducted more easily
34. An electric circut with a single path
Corona
Static friction
Series circut
Atomic number
35. A heat that required to change (water from liquid to solid) from one state to another.
Pitch
Conduction
Heat latent
Corona
36. 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
Current
Centrifuge
Magnetic field
electroscope
37. Parts of 2 compounds replace each other. Ex. Switch partners AX + BY -> AY + BX
Chemical properties of metalliods
maximum number of electrons that an atom holds with one energy level
Types of kinetic energy?
Double replacement Reactions
38. Change in the apparent frequency of a wave as observer and source move toward or away from each other
Doppler effect
Ionic Bonds
Noble gasses
Semi - conductors
39. Average mass of various isotopes of the element.
Non - metals
When light hits a smooth and shiny surface
Atomic mass
Atom
40. Are small positively charged particles
Boyles law states
What are the 2 most common encountered forms of energy are
Protons
chemically active
41. The object is further than one focal length from the lens
A converging lens produces a real image when
On the periodic table which elements are grouped by color
Neutrons
Silicon
42. Meter is the base unit of...
Carbon Dioxide
Buret
Length
The intensity of sound is measured in
43. Higher because it has higher apparent frequency.
Composition reaction
As the train approaches and blasts its whistle - the whistle sounds..
Current
Louis Pasteur
44. (physics and chemistry) the smallest component of an element having the chemical properties of the element
Louis Pasteur
Nuclear energy
Atom
Work
45. The center of the atom.
Nuclear energy
oscilloscope
Nucleus
Pull of gravity
46. A functional group consisting of a sulfur atom bonded to a hydrogen atom (
Magnetic domains
sulfhydryl group (Functional Group)
Nuclear fission
Conduction
47. 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
Catalysts
Chromatography
Centrifuge
Spectrophotometry
48. 1. Constructive 2. Destructive
Two types of wave interference are (sound related)
The intensity of sound is measured in
What are the 2 most common encountered forms of energy are
Fahrenheit
49. Is the transfer of energy by waves such as the electromagnetic waves emitted by stars the sun warms the earth by emitting radiant energy.
Electricity charged objects share these characteristics (3)
Radiation
Isotopes
Load & switch
50. Nuclear fission - Nuclear Fusion
types of nuclear reactions?
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?
Potential energy
Semi - conductors