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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. 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 -
Nuclear energy
An electromagnet can be made more powerful in 3 ways
Some Uses of electricity
The presence of cells in the sample
2. (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.
Strong electrolytes
Some characteristics of crystals
Density
Nuclear reaction
3. The force of attraction between two objects. Gravity exists not only on earth - but also between planets as well as in black wholes
Strong electrolytes
Pull of gravity
Convection
Kinetic energy
4. Average mass of various isotopes of the element.
Atomic mass
Load & switch
Heat vaporization
Latent heat
5. Formed when one or more electrons are transferred from one atom to another. Transfer of electrons happens when metals & non - metals bond.
Kinetic Friction
Metalloids
Nuclear Fusion
Ionic Bonds
6. The mechanical energy that a body has by virtue of its position Ex. Stored energy -
potential energy
Alkaline earth metals are
Difference between metals & non - metals
Types of kinetic energy?
7. 1000x the base unit
circut types
Kilo
Transverse Waves
isotopes of each other
8. A functional group consisting of a phosphorus atom covalently bonded to four oxygen atoms. Ideal for energy transfer reactions (ATP).
types of particles in the nucleus?
Stable electron arrangement
Phosphate group
Gay - Lussac's Law
9. A material such as glass or porcelain with negligible electrical or thermal conductivity. Electric charges do not move easily - if at all.
Hecto
Insulator
Archimedes principle
Kelvin
10. The volume of a gas is directly proportional to the temperature of a gas
circut types
Spectrophotometry
Valence electrons
Charles law
11. What quantity of oxygen - O2 - contains very nearly the same number of molecules as 36.0 grams of water - H2O?
64.0 grams
Hydrocarbons
Neutrons
Endothermic
12. 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.
Atomic number
Semi - conductors
Buret
Ions are
13. 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.
Phases of matter
sulfhydryl group (Functional Group)
Difference between metals & non - metals
Forces on a moving object
14. A nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy
chemically active
Nuclear fission
Refraction
Density
15. The property of sound that varies with variation in the frequency of vibration.
chemically active
During ____ elements change into other elements change into other elements called _____ elements.
Electrons
Pitch
16. Conduction - Convection - & Radiation
Mass
Heat is transferred in 3 ways
Mass number
Types of kinetic energy?
17. Is done on an object when an applied force moves across a distance.
Destructive interference
Load & switch
Work
Two types of wave interference are (sound related)
18. The amount of heat it takes to change a solid to a liquid
Kinetic Molecular theory
Latent heat
Silicon
Constructive interference
19. Is an atom that has all of its electrons in the lowest possible energy levels
Stable electron arrangement
Mole
Neutrons
Kinetic Friction
20. An electric circut with a single path
Difference between metals & non - metals
Series circut
First law of thermodynamics
Newton's 3rd law motion
21. Elements in the middle of the periodic table - in groups 3-12.
Types of Friction & Resistance
The intensity of sound is measured in
Semi - conductors
Transition elements
22. 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
Insulin
Strong electrolytes
Latent heat
Evaporation
23. 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.
Spectrophotometry
Lewis dot structures
Work
Nuclear energy
24. Not as easy to recognize as metal bc they do not always share physical properties. They are dull - brittle - & not good conductors of heat
Direct Variations
Non - metal
Nuclear energy
Chromatography
25. Specific gravity is the ratio based on...
Load & switch
Silicon
Density
same
26. Substance that dissociates completely into its ions when added to water and conducts electricity well.
Insulator
Compound machines
Strong electrolytes
Sonar technology
27. Is the change from liquid to gas.
Evaporation
3rd law of thermodynamics
First law of thermodynamics
Non - metal
28. Measure of the earth's pull
Pull of gravity
Alkali metals are
Weight
3rd law of thermodynamics
29. A temperature scale with the freezing point of water 32 degrees and the boiling point of 212 degrees.
Celsius
Fahrenheit
electroscope
sulfhydryl group (Functional Group)
30. The principle of conservation of energy: Energy can be transferred and transformed - but it cannot be created or destroyed.
Nuclear Fusion
Types of Friction & Resistance
Resistance
First law of thermodynamics
31. Discovered in the late 1800s that micro organisms play a casual role in onset of a disease
Group 1 on the periodic table are all
Louis Pasteur
Heat is transferred in 3 ways
Two types of wave interference are (sound related)
32. Electronic equipment that provides visual images of varying electrical quantities - Useful in studying waves b/c it gives a picture of the wave.
oscilloscope
Noble gasses
Physical properties of Meralliods
Kilo - calorie
33. Where are protons an neutrons located?
Alkali metals are
Kilo
When light hits a smooth and shiny surface
Inside the nucleus
34. The sum of the protons and neutrons
When light hits a smooth surface
Types of Friction & Resistance
Heat vaporization
the mass number of an atom
35. SI unit of temperature; indicates number of units above absolute zero. To go from Celsius to Kelvin add 273. To go from Kelvin to Celsius subtract 273.
Electromagnets
The presence of cells in the sample
Kelvin
Atomic number
36. Causes motion
Composition reaction
Resistance
Force
Chemical reactions
37. Small uncharged particles in the nucleus they are neutral
Kinetic Molecular theory
Neutrons
Resistance
Types of kinetic energy?
38. 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
Longitudinal Waves
Catalysts
Potential difference
Sonar technology
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?
Heat
Kinetic Friction
Black
Decomposition reaction
40. Mass & weight are not the ____ quality
Deci
same
Newtons 2nd law of motion
Calorimeter
41. A carbon atom linked by a double bond to an oxygen atom. - c=o.
Carbonyl Group (Functional Group)
Circut
Direct Variations
Catalysts
42. Two or more simple machines working together EX. wheelbarrow it uses level - wheel & axle.
Simple machines
Thermal contact
Chromatography
Compound machines
43. A free element replaces an element that is a part of a compound. Ex. A +BX -> AX + B
Single replacement reaction
Simple machines
Law of momentum conservation
Forces on a moving object
44. Experiments may not be done on...
Group 2 on the periodic table
Length
Static friction
birds
45. 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.
Kilo
Thermal contact
Energy
Potential difference
46. A Compound breaks down into 2 or more simpler substances EX. AB -> A+B
Chordates
Covalent Bonds
Decomposition reaction
Destructive interference
47. # of electrons. Non - metals have 4-8 electrons in their outermost energy.
Ionic Bonds
Some Uses of electricity
Difference between metals & non - metals
Transverse Waves
48. Heat transferred by direct contact
Neutrons
Atomic number
Electrons
Conduction
49. Is the study of the relationship between motion & the forces affecting motion.
Latent heat
Two types of wave interference are (sound related)
Dynamics
Types of Friction & Resistance
50. Negatively charged particles found outside the nucleus
Electrons
Strong electrolytes
On the periodic table which elements are grouped by color
Mass