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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 free element replaces an element that is a part of a compound. Ex. A +BX -> AX + B
Density
Evaporation
Single replacement reaction
Law of momentum conservation
2. The number of electrons per second that flow past a point in a circut.
Two types of wave interference are (sound related)
oscilloscope
Current
Boron
3. Elements in the middle of the periodic table - in groups 3-12.
Group 2 on the periodic table
Transition elements
Constructive interference
Types of kinetic energy?
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.
Chemical reactions
Specific gravity
Chordates
Spectrophotometry
5. Shiny - softer & less dense. Mostly chemically active
Condensation
Alkali metals are
Series circut
Gay - Lussac's Law
6. Measure of the disorder or randomness of the particles that make of a system (measurement of movement of particles in a spontaneous reaction) EX. entropy increases as matter and energy in the universe degrade to an ultimate state of inert uniformity.
Entropy
Potential difference
Thermal equilibrium
Dynamics
7. Change from gas to liquid
Mass
Charles law
Isotopes
Condensation
8. What are the # of protons in the nucleus of an atom called?
Nuclear reaction
Atomic number
Ampmeter
Catalysts
9. 1/1000 the base unit
Some Uses of electricity
Energy
Milli
Linear acceleration
10. Not as easy to recognize as metal bc they do not always share physical properties. They are dull - brittle - & not good conductors of heat
Corona
Heat transfer
Carbon Dioxide
Non - metal
11. 1000x the base unit
Kilo
Thermal equilibrium
Push & Pull
3rd law of thermodynamics
12. Uses the transfer of heat from one substance to another to determine the specific heat of the substance.
Hecto
Metalloids
Covalent Bonds
Calorimeter
13. When force is applied to an object it moves in a straight line and adding force can make it go faster or slow down.
Electrochemistry
Straight line motion
types of nuclear reactions?
chemically active
14. The difference in electrical charge between two points in a circuit expressed in volt. When an electron goes through a load it does work & loses some energy.
Potential difference
Laws of thermodynamic / Laws of conservation
At the bottom of the meniscus curve
Electrons
15. A carbon atom linked by a double bond to an oxygen atom. - c=o.
Carbonyl Group (Functional Group)
Some characteristics of crystals
types of nuclear reactions?
Conduction
16. (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.
Hydrocarbons
Atom
On the periodic table which elements are grouped by color
Nuclear reaction
17. Are used in the treatment of cancer b/c they can kill cancer cells. However - if powerful enough they can kill healthy cells.
Alkali metals are
the mass number of an atom
Sonar technology
Radioactive Particles
18. The force of attraction between two objects. Gravity exists not only on earth - but also between planets as well as in black wholes
Pull of gravity
Metalloids
The electromagnetic spectrum
Thermal equilibrium
19. Current is measured with a device called...
Non - metal
Series circut
Physical properties of Meralliods
Ampmeter
20. Potential & Kinetic
Carbonyl Group (Functional Group)
What are the 2 most common encountered forms of energy are
Forces on objects at rest
Phases of matter
21. Conduction - Convection - & Radiation
Isotopes
Convection
Heat is transferred in 3 ways
Catalysts
22. A nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy
birds
Weak Electrolytes
Atom
Nuclear fission
23. A compound of which a relatively small amount of the dissolved solute exists as ions in an aqueous solution. Example: Acetic acid - CH3COOH (vinegar)
Electromagnets
Weak Electrolytes
Neutrons
When light hits a smooth surface
24. The region around a magnet where the magnetic force is exerted
Water
Magnetic field
Inertia & circular motion
Deci
25. Removal of static electricity by conduction
Linear acceleration
Convection
Grounding Charge
Nuclear Fusion
26. # of protons + # of neutrons
Celsius
Heat transfer
Corona
Mass number
27. Making and breaking of chemical bonds between atoms bonds involve only the outer electrons & do not effect the nucleus
Chemical reactions
Atomic mass
isotopes of each other
Pasteur's postulate
28. A heat that required to change (water from liquid to solid) from one state to another.
Heat latent
Evaporation
Single replacement reaction
Circut
29. Mass of the substance contained per unit of volume
Isotopes
Heat vaporization
Density
Applications of Archimedes principle
30. Temporary magnets that lose their magnetism when electric current is removed
Single replacement reaction
Electromagnets
Boyles law states
Kilo - calorie
31. F - branch of chemistry that deals with the chemical action of electricity and the production of electricity by chemical reactions
Insulin
Heat Fusion
Noble gasses
Electrochemistry
32. Carbon atom - atomic number 6 - atomic mass 11
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
isotopes of each other
Deci
Heat
33. Atoms of the same element that have different numbers of neutrons
Phases of matter
Decomposition reaction
Isotopes
Pull of gravity
34. Concave
birds
Carbon Dioxide
Eyeglasses are ____ so the image will hit the retina
Weight
35. They are neither precise nor accurate.
Resistance
Covalent Bonds
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?
At the bottom of the meniscus curve
36. Submarines - diving weighting system - naval architecture - Flotation - Buoyancy compensator
Magnetic domains
During ____ elements change into other elements change into other elements called _____ elements.
Corona
Applications of Archimedes principle
37. Higher because it has higher apparent frequency.
Straight line motion
Heat conduction
Lewis dot structures
As the train approaches and blasts its whistle - the whistle sounds..
38. Heat energy that is transferred into or out of a system
64.0 grams
Mass
Types of potential energy?
Heat transfer
39. A boulder is sitting at the edge of the cliff it has which type of energy?
conducted more easily
Atomic number
Magnetic domains
Potential energy
40. Resistance is measured in...
Inside the nucleus
maximum number of electrons that an atom holds with one energy level
Catalysts
OHMS
41. The amount of energy required to change a substance from the solid phase to the liquid phase at its melting point
Atom
Some characteristics of crystals
Dynamics
Heat Fusion
42. The buoyant force on an object is equal to the weight of the fluid displaced by the object
Boyles law states
Archimedes principle
Celsius
Newtons 2nd law of motion
43. 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
Semi - conductors
Rubbing
The intensity of sound is measured in
Centrifuge
44. Inclined plane - lever - wheel & axle - pulley.
Newtons 2nd law of motion
Mass
Simple machines
alloy
45. Electrons in the outermost energy level; they are involved in bond formation
Neutrons
Valence electrons
Kinetic Friction
Two types of wave interference are (sound related)
46. 1/10 the base unit
Direct Variations
64.0 grams
Deci
When light hits a smooth surface
47. 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)
Atomic mass
Kilo
Hydrophilic
Push & Pull
48. The mechanical energy that a body has by virtue of its position Ex. Stored energy -
potential energy
Pasteur's postulate
Difference between metals & non - metals
Laws of thermodynamic / Laws of conservation
49. 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?
Hydrocarbons
Dynamics
OHMS
Linear acceleration
50. Specific gravity is the ratio based on...
Celsius
A converging lens produces a real image when
Density
Mass