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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. 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.
Push & Pull
oscilloscope
Spectrophotometry
Composition reaction
2. The Earth's seasons can be attributed primarily to which of the following in conjunction with its revolution about the Sun?
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3. Parts of 2 compounds replace each other. Ex. Switch partners AX + BY -> AY + BX
Radiation
Double replacement Reactions
Entropy
Isotopes
4. Is the change from liquid to gas.
Evaporation
Pull of gravity
Group 2 on the periodic table
Weak Electrolytes
5. Carbon atom - atomic number 6 - atomic mass 11
Decomposition reaction
isotopes of each other
Insulator
same
6. F - branch of chemistry that deals with the chemical action of electricity and the production of electricity by chemical reactions
Transverse Waves
Electrochemistry
Static friction
Chemical bond
7. The agent most widely and most consistently at work changing the appearance of the Earth's surface
Water
Push & Pull
Circut
The higher the voltage
8. The center of the atom.
When a light hits a rough surface
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?
Endothermic
Nucleus
9. Resistance is measured in...
maximum number of electrons that an atom holds with one energy level
Silicon
the mass number of an atom
OHMS
10. Is the transfer of heat with no actual transfer of matter. Ex. Iron pan of flame.
potential energy
Conduction
Non - metals
oscilloscope
11. Atoms with an equal # of protons and electrons.
types of particles in the nucleus?
The electromagnetic spectrum
Density
Ions are
12. Reflects the light in one direction
Heat vaporization
Venturi effect
Phases of matter
When light hits a smooth surface
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.
Compound machines
Forces on a moving object
Spectrophotometry
Applications of Archimedes principle
14. The property of sound that varies with variation in the frequency of vibration.
Resistance
Types of Friction & Resistance
Pitch
Heat conduction
15. The object is further than one focal length from the lens
Thermal contact
A converging lens produces a real image when
Corona
Pitch
16. 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
true of hurricanes but not of tornadoes
Insulin
17. 10x the base unit
Transverse Waves
Law of momentum conservation
Deca
Types of Friction & Resistance
18. Is the study of the relationship between motion & the forces affecting motion.
Dynamics
Isotopes
Pull of gravity
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?
19. Record vibrations in earth & allow us to measure earthquake activity.
Louis Pasteur
Longitudinal Waves
Density
Seismographs
20. Solid has a definite shape and volume - Liquid has definite volume - but no shape - Gas has no shape of volume.
Kinetic Friction
Destructive interference
Phases of matter
Load & switch
21. Clustered regions of aligned magnetic atoms. When these regions are aligned with one another - the substance containing them is a magnet.
Convection
Mass
Electrons
Magnetic domains
22. Average mass of various isotopes of the element.
Atomic mass
Chordates
Heat
Pasteur's postulate
23. The principle of conservation of energy: Energy can be transferred and transformed - but it cannot be created or destroyed.
On the periodic table which elements are grouped by color
First law of thermodynamics
Silicon
Mass
24. A material such as glass or porcelain with negligible electrical or thermal conductivity. Electric charges do not move easily - if at all.
3rd law of thermodynamics
sulfhydryl group (Functional Group)
Eyeglasses are ____ so the image will hit the retina
Insulator
25. 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
An electromagnet can be made more powerful in 3 ways
Heat
Group 2 on the periodic table
26. The number of electrons per second that flow past a point in a circut.
Current
Inertia & circular motion
2nd law of thermodynamics
Noble gasses
27. States that when 2 objects collide in an isolated system the total momentum of 2 objects after the collision. That is the momentum gained by object.
Law of momentum conservation
Spectrophotometry
Group 2 on the periodic table
Fahrenheit
28. Have properties in between metals and non - metals found in groups 13-16
Ionic Bonds
Mass
Difference between metals & non - metals
Metalloids
29. A wave in which the particles move parallel to the path of the wave
Kelvin
Longitudinal Waves
Calorie
Nuclear fission
30. Excess energy is released into the environment
Exothermic
The electromagnetic spectrum
Isotopes
Radiation
31. Is done on an object when an applied force moves across a distance.
Hydrophilic
Heat latent
Semi - conductors
Work
32. Inclined plane - lever - wheel & axle - pulley.
Simple machines
During ____ elements change into other elements change into other elements called _____ elements.
Conduction
Grounding Charge
33. Electrons in the outermost energy level; they are involved in bond formation
Atomic mass
Mass
Series circut
Valence electrons
34. Making and breaking of chemical bonds between atoms bonds involve only the outer electrons & do not effect the nucleus
Chemical reactions
conducted more easily
Resistance
On the periodic table which elements are grouped by color
35. Shiny - softer & less dense. Mostly chemically active
same
Nuclear Fusion
Alkali metals are
Strong electrolytes
36. Temporary magnets that lose their magnetism when electric current is removed
Charles law
Electromagnets
Insulin
Types of kinetic energy?
37. The buoyant force on an object is equal to the weight of the fluid displaced by the object
Resistance
Carbon Dioxide
Archimedes principle
Avogadros hypothesis
38. (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.
Heat Fusion
Inertia & circular motion
Nuclear reaction
electrostatics
39. Finding that a solution conducts an electric current shows conclusively that the solution...
Double replacement Reactions
Contains ions
Newtons 2nd law of motion
Heat conduction
40. 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.
maximum number of electrons that an atom holds with one energy level
sulfhydryl group (Functional Group)
Transition elements
Potential difference
41. A circut with two or more resistors where the electricity has more than one path to travel
Inertia & circular motion
Push & Pull
Parallel Circut
Metalloids
42. Static friction - Kinetic friction - Push & pull - rubbing - pull of gravity - forces on objects at rest - forces on a moving object - inertia & circular motion.
Destructive interference
Types of Friction & Resistance
Kinetic Molecular theory
Current
43. Describes the force of friction of 2 surfaces that are in contact but do not have any motion relative to eachother.
Energy
Doppler effect
Halogens
Static friction
44. The relationship between voltage - current - and resistance - V=IR
OHMS law
Metalloids
Kilo - calorie
Inside the nucleus
45. Substance that dissociates completely into its ions when added to water and conducts electricity well.
Decomposition reaction
Strong electrolytes
Some substances have no noticeable odor because these substances
What are the 2 most common encountered forms of energy are
46. The total entropy of a system plus that of its surroundings always increase.
Kelvin
2nd law of thermodynamics
Chemical bond
Spectrophotometry
47. That for a fixed amount of gas at a constant temperature - the volume of a gas increases as its pressure decreases
Double replacement Reactions
Density
Electrophoresis
Boyles law states
48. 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
Water
Alkaline earth metals are
An electromagnet can be made more powerful in 3 ways
Centrifuge
49. (physics) the capacity of a physical system to do work - or supply heat.
Metalloids
Evaporation
Some Uses of electricity
Energy
50. All processes cease when temperature approaches 0.
Kilo - calorie
Kinetic energy
3rd law of thermodynamics
Radiation