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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. Formed when one or more electrons are transferred from one atom to another. Transfer of electrons happens when metals & non - metals bond.
Kilo - calorie
maximum number of electrons that an atom holds with one energy level
Condensation
Ionic Bonds
2. Negatively charged particles found outside the nucleus
Electrons
Noble gasses
Conduction
Potential difference
3. Experiments may not be done on...
Radioactive Particles
Louis Pasteur
birds
Some characteristics of crystals
4. The buoyant force on an object is equal to the weight of the fluid displaced by the object
Straight line motion
Nuclear energy
Archimedes principle
Carbonyl Group (Functional Group)
5. (physics) the capacity of a physical system to do work - or supply heat.
chemically active
At the bottom of the meniscus curve
Energy
electroscope
6. Conduction - Convection - & Radiation
Inside the nucleus
Heat is transferred in 3 ways
Pasteur's postulate
Latent heat
7. The amount of heat it takes to change a solid to a liquid
true of hurricanes but not of tornadoes
Latent heat
Semi - conductors
Group 2 on the periodic table
8. The interference that occurs when two waves combine to make a wave with a larger amplitude
Halogens
Black
sulfhydryl group (Functional Group)
Constructive interference
9. An electric circut with a single path
Series circut
Semi - conductors
Resistance
Calorimeter
10. The object is further than one focal length from the lens
Deci
A converging lens produces a real image when
Calorie
Carbonyl Group (Functional Group)
11. Electrons that can accept energy from outside sources and move farther away from the nucleus
Conduction
Conduction
Excited electrons
Calorie
12. You see your reflection
What are the 2 most common encountered forms of energy are
Resistance
Louis Pasteur
When light hits a smooth and shiny surface
13. The volume of a gas is directly proportional to the temperature of a gas
Magnetic field
Ions are
Charles law
Atom
14. Temporary magnets that lose their magnetism when electric current is removed
Kelvin
Doppler effect
Energy
Electromagnets
15. Removal of static electricity by conduction
Atomic mass
Centrifuge
Grounding Charge
Phosphate group
16. Metric unit for measuring temperature; On this scale water freezes at zero and boils at 100.
Isotopes
Forces on a moving object
Evaporation
Celsius
17. 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
Kinetic Molecular theory
Difference between metals & non - metals
isotopes of each other
18. Record vibrations in earth & allow us to measure earthquake activity.
Two types of wave interference are (sound related)
Corona
Kelvin
Seismographs
19. Reflects the light in one direction
Excited electrons
Force
electroscope
When light hits a smooth surface
20. Elements in the middle of the periodic table - in groups 3-12.
Transition elements
types of particles in the nucleus?
Exothermic
Protons
21. Inclined plane - lever - wheel & axle - pulley.
Simple machines
true of hurricanes but not of tornadoes
Calorie
Metalloids
22. Do not have molecules with one of the two molecular arrangements required to give an odor
Pasteur's postulate
Atomic number
Catalysts
Some substances have no noticeable odor because these substances
23. A heat that required to change (water from liquid to solid) from one state to another.
Heat latent
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?
Neutrons
Types of kinetic energy?
24. What are the # of protons in the nucleus of an atom called?
Atomic number
Kilo - calorie
Two types of wave interference are (sound related)
Longitudinal Waves
25. 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.
Heat is transferred in 3 ways
Insulin
Non - metals
Buret
26. 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
Latent heat
Newtons 2nd law of motion
Difference between metals & non - metals
Stable electron arrangement
27. Are small positively charged particles
Ions are
Catalysts
Heat transfer
Protons
28. Alkaline earth metals
Group 2 on the periodic table
Chordates
Catalysts
Pasteur's postulate
29. Is the measure of energy temperature is a measure of the heat in an object.
Celsius
Potential energy
Metalloids
Heat
30. 1.) Protons 2.) Neutrons - They both have the same mass - but neutrons have no mass.
types of particles in the nucleus?
OHMS law
Applications of Archimedes principle
Constructive interference
31. 1. All are solids having the appearance of metals & non - metals. 2. All are white or gray - but not shiny 3. Conduct electricity - but not as well as metals.
Mass
Physical properties of Meralliods
When light hits a smooth surface
Some characteristics of crystals
32. Electrons in the outermost energy level; they are involved in bond formation
Conduction
Valence electrons
Neutrons
Strong electrolytes
33. The branch of physics that deals with static electricity - study of stationary electric charges.
Hydroxyl group ( Functional group)
When light hits a smooth and shiny surface
electrostatics
OHMS law
34. Measures the amount of matter in an object
Mass
Physical properties of Meralliods
Boron
Radiation
35. An object's _____ gives it resistance to change its current state of motion it is also the measure of an objects resistance to acceleration.
Thermal contact
Mass
Black
Single replacement reaction
36. 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.
Types of Friction & Resistance
Potential difference
Some characteristics of crystals
Energy
37. Ratio of the density of a substance to the density of water
Insulin
2nd law of thermodynamics
Semi - conductors
Specific gravity
38. Describes the force of friction of 2 surfaces that are in contact but do not have any motion relative to eachother.
Static friction
Force
Chemical reactions
Some substances have no noticeable odor because these substances
39. It is second element in group 14 - semi - conductor. Sand is made of silicon - it is also used to manufacture glass and cement.
maximum number of electrons that an atom holds with one energy level
Silicon
Length
Kinetic Molecular theory
40. Solid has a definite shape and volume - Liquid has definite volume - but no shape - Gas has no shape of volume.
Laws of thermodynamic / Laws of conservation
Series circut
same
Phases of matter
41. A principle that states that for every action there is an equal reaction in the opposite direction
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42. The more energy the electrons have
the mass number of an atom
Atom
Potential difference
The higher the voltage
43. '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
A converging lens produces a real image when
Strong electrolytes
newtons first law of motion
Forces on a moving object
44. The molecular weight of a substance expressed in grams - measures the amount of a substance
Push & Pull
Convection
Mole
Inside the nucleus
45. Clustered regions of aligned magnetic atoms. When these regions are aligned with one another - the substance containing them is a magnet.
Magnetic domains
Ions are
OHMS
Pasteur's postulate
46. Where are protons an neutrons located?
Evaporation
Atom
Inside the nucleus
chemically active
47. Mass & weight are not the ____ quality
Phosphate group
Nuclear energy
Physical properties of Meralliods
same
48. Equal volumes of gases at the same temperature and pressure contain equal numbers of particles
Ampmeter
Kinetic energy
As the train approaches and blasts its whistle - the whistle sounds..
Avogadros hypothesis
49. According to some scientists - the Earth's average surface temperature is rising as a result of the greenhouse effect. An increase in the atmospheric concentration of which of the following gases is considered to be primarily responsible
newtons first law of motion
Kelvin
Carbon Dioxide
Contains ions
50. Is the work done divided by the amount of the time it took to do it. P= w/t
Power
Resistance
When light hits a smooth surface
Chordates