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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 from gas to liquid
Group 1 on the periodic table are all
Catalysts
Potential energy
Condensation
2. Electrons that can accept energy from outside sources and move farther away from the nucleus
Kinetic energy
Destructive interference
Convection
Excited electrons
3. 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?
Semi - conductors
Linear acceleration
Hydrophobic
Radiation
4. 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
Ampmeter
Difference between metals & non - metals
Electrons
5. The device (bell or Build) is an example of a load. A load is a device that uses energy.
Load & switch
During ____ elements change into other elements change into other elements called _____ elements.
Weak Electrolytes
Push & Pull
6. Excess energy is released into the environment
Atomic number
Exothermic
Grounding Charge
Boyles law states
7. Where are protons an neutrons located?
Linear acceleration
Inside the nucleus
Phosphate group
Pitch
8. A functional group consisting of a sulfur atom bonded to a hydrogen atom (
sulfhydryl group (Functional Group)
Electrophoresis
Thermal contact
Exothermic
9. The mechanical energy that a body has by virtue of its position Ex. Stored energy -
OHMS
types of particles in the nucleus?
Atomic mass
potential energy
10. The center of the atom.
Newtons 2nd law of motion
chemically active
Nucleus
Forces on objects at rest
11. 'An object at rest will remain at rest - and an object moving at a constant velocity will continue moving at a constant velocity - unless it is acted upon by an unbalanced force.' Another name is Law of Inertia
newtons first law of motion
Carbonyl Group (Functional Group)
Phosphate group
Avogadros hypothesis
12. An isotope has a different number of...
Push & Pull
Neutrons
Evaporation
Hydrophilic
13. The buoyant force on an object is equal to the weight of the fluid displaced by the object
Composition reaction
Archimedes principle
Straight line motion
Forces on objects at rest
14. 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.
At the bottom of the meniscus curve
birds
Potential energy
Electrophoresis
15. Meter is the base unit of...
Conduction
Length
Electrons
chemically active
16. Is the change from liquid to gas.
Carbonyl Group (Functional Group)
Law of momentum conservation
Evaporation
OHMS
17. (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.
Nuclear reaction
Atomic mass
Types of kinetic energy?
Static friction
18. 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.
isotopes of each other
Magnetic domains
Potential difference
Protons
19. 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
Silicon
Chromatography
Carbonyl Group (Functional Group)
Mass number
20. # of electrons. Non - metals have 4-8 electrons in their outermost energy.
Insulin
electroscope
Calorie
Difference between metals & non - metals
21. Reflects the light in one direction
Deca
Neutrons
When light hits a smooth surface
Conduction
22. Is formed when 2 atoms share electrons - covalent bonding happens among non - metals.
Covalent Bonds
Water
alloy
Static friction
23. Is done on an object when an applied force moves across a distance.
Doppler effect
Magnetic domains
Work
Double replacement Reactions
24. Resistance is measured in...
Single replacement reaction
First law of thermodynamics
OHMS
Centrifuge
25. An electric circut with a single path
Series circut
Phases of matter
A converging lens produces a real image when
Radiation
26. Static friction - Kinetic friction - Push & pull - rubbing - pull of gravity - forces on objects at rest - forces on a moving object - inertia & circular motion.
Silicon
Black
Nuclear Fusion
Types of Friction & Resistance
27. Compounds that speed up chemical reactions. Sometimes without Catalysts reactions cant occur.
Linear acceleration
Neutrons
Catalysts
Grounding Charge
28. 1. Have some characteristics of metals & non - metals. 2. Properties do not follow patterns like metals & non - metals.
Series circut
Chemical properties of metalliods
Transition elements
types of nuclear reactions?
29. Heat transferred by direct contact
Contains ions
Series circut
Conduction
Composition reaction
30. Which of the following parts of the Sun is easily visible only during a total solar eclipse
Circut
Calorimeter
OHMS law
Corona
31. Causes motion
Force
Potential energy
Boron
Pull of gravity
32. Group 17; contains nonmetals; 7 electrons in its outermost energy level; very reactive; poor conductors of electric current; never in its uncombined form in nature; combine with most metals to form salts
Halogens
Nuclear fission
Corona
Physical properties of Meralliods
33. Formed when one or more electrons are transferred from one atom to another. Transfer of electrons happens when metals & non - metals bond.
Hydrophobic
Heat latent
Corona
Ionic Bonds
34. The state of two or more objects or substances in thermal contact when they have reached a common temperature - EX. the affects after a hot cup of coffee meeting the desk temperature.
Kinetic Molecular theory
Mass
Thermal equilibrium
Louis Pasteur
35. Animals in which of the following groups may have a backbone and a spinal cord?
Chordates
Seismographs
3rd law of thermodynamics
Pitch
36. Inclined plane - lever - wheel & axle - pulley.
Boyles law states
At the bottom of the meniscus curve
When a light hits a rough surface
Simple machines
37. Used in electrical devices that have to function at temperatures too high for metals.
Semi - conductors
Deci
Hecto
Load & switch
38. 1.) Protons 2.) Neutrons - They both have the same mass - but neutrons have no mass.
Forces on objects at rest
types of particles in the nucleus?
Silicon
Black
39. They form only over warm oceans
Eyeglasses are ____ so the image will hit the retina
Convection
true of hurricanes but not of tornadoes
Parallel Circut
40. The energy released by a nuclear reaction - binding energy is released when the nuclei of atoms are split apart in a nuclear reaction this binding energy is called nuclear energy.
Bernoulli principle
Nuclear energy
The intensity of sound is measured in
Chemical properties of metalliods
41. Energy is added to a system one of two things must happen either thermal energy must increase or work must be done.
At the bottom of the meniscus curve
Spectrophotometry
Thermal equilibrium
Laws of thermodynamic / Laws of conservation
42. 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
Venturi effect
potential energy
Potential energy
43. Clustered regions of aligned magnetic atoms. When these regions are aligned with one another - the substance containing them is a magnet.
Mass
Atomic number
Magnetic domains
Doppler effect
44. Electrons in the outermost energy level; they are involved in bond formation
Evaporation
Decomposition reaction
Boron
Valence electrons
45. The amount of energy required for the liquid at its boiling point to become a gas
potential energy
Destructive interference
Heat vaporization
Archimedes principle
46. 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
Direct Variations
Evaporation
Latent heat
Non - metal
47. They are neither precise nor accurate.
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?
Hydrophobic
Radiation
Alkaline earth metals are
48. The acceleration of an object depends on the mass of the object and the amount of force applied.
Resistance
Electromagnets
Pasteur's postulate
Newtons 2nd law of motion
49. 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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50. All processes cease when temperature approaches 0.
Kinetic energy
At the bottom of the meniscus curve
3rd law of thermodynamics
Constructive interference