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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. Is the measure of energy temperature is a measure of the heat in an object.
Heat
Phases of matter
chemically active
Entropy
2. Friction opposes the motion of one surface past another - Friction is common when slowing down a car or sledding down a hill.
Ampmeter
An electromagnet can be made more powerful in 3 ways
Strong electrolytes
Rubbing
3. Small uncharged particles in the nucleus they are neutral
Neutrons
Avogadros hypothesis
Ionic Bonds
Doppler effect
4. Harder - denser - have higher melting points & are chemically active.
Alkaline earth metals are
Electrochemistry
Composition reaction
Kinetic Friction
5. As the velocity of a fluid increases - the pressure exerted by the fluid decreases - The speed of a fluid - liquid - gas - increases the pressure exerts.
Bernoulli principle
Density
Electrons
Pull of gravity
6. A carbon atom linked by a double bond to an oxygen atom. - c=o.
Transition elements
Fahrenheit
Mass number
Carbonyl Group (Functional Group)
7. The buoyant force on an object is equal to the weight of the fluid displaced by the object
Isotopes
Kilo
Archimedes principle
newtons first law of motion
8. Equal volumes of gases at the same temperature and pressure contain equal numbers of particles
Carbon Dioxide
Avogadros hypothesis
Resistance
Atomic number
9. The centripetal force is provided by the high banking of the curved road & by friction between the wheels & the road.
Chemical properties of metalliods
Inertia & circular motion
true of hurricanes but not of tornadoes
Difference between metals & non - metals
10. Making and breaking of chemical bonds between atoms bonds involve only the outer electrons & do not effect the nucleus
Types of kinetic energy?
Chemical reactions
When a light hits a rough surface
Force
11. 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?
Eyeglasses are ____ so the image will hit the retina
Alkali metals are
Calorie
Black
12. 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
circut types
Newtons 2nd law of motion
Latent heat
Seismographs
13. 1000x the base unit
Atomic mass
Composition reaction
The presence of cells in the sample
Kilo
14. 1.) Protons 2.) Neutrons - They both have the same mass - but neutrons have no mass.
types of particles in the nucleus?
Mass
Doppler effect
Inside the nucleus
15. Removal of static electricity by conduction
Law of momentum conservation
Grounding Charge
Chromatography
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?
16. The theory that all matter is composed of particles (atoms and molecules) moving constantly in random directions
Kinetic Molecular theory
When a light hits a rough surface
Destructive interference
The intensity of sound is measured in
17. Series circut - Parallel circut
circut types
Calorie
Lewis dot structures
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
18. The same pathogen must be found in every person with the same disease - the pathogen must be isolated & grown in a culture - when the organism is re - introduced in an experimental animal - that animal should develop the same disease originally seen
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19. The interference that occurs when two waves combine to make a wave with a smaller amplitude
Push & Pull
Weak Electrolytes
Destructive interference
Neutrons
20. It scatters light in many directions
Potential energy
Push & Pull
Metalloids
When a light hits a rough surface
21. Meter is the base unit of...
Length
Kelvin
Electricity charged objects share these characteristics (3)
Kinetic Molecular theory
22. 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.
Buret
Heat vaporization
Chemical reactions
Archimedes principle
23. The interference that occurs when two waves combine to make a wave with a larger amplitude
Direct Variations
Constructive interference
Conduction
Archimedes principle
24. 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
Sonar technology
Circut
Nuclear reaction
Strong electrolytes
25. The sum of the protons and neutrons
the mass number of an atom
Magnetic field
Group 2 on the periodic table
Latent heat
26. The object is further than one focal length from the lens
Mass
A converging lens produces a real image when
Latent heat
Forces on a moving object
27. 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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28. Is the transfer of heat with no actual transfer of matter. Ex. Iron pan of flame.
Conduction
the mass number of an atom
Nucleus
Alkali metals are
29. A mixture containing two or more metallic elements or metallic and nonmetallic elements usually fused together or dissolving into each other when molten Ex. Brass is an alloy of zinc and copper
sulfhydryl group (Functional Group)
The presence of cells in the sample
alloy
Calorimeter
30. 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
Doppler effect
When light hits a smooth and shiny surface
Carbon Dioxide
Electromagnets
31. A nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy
Ions are
Nuclear Fusion
Louis Pasteur
types of nuclear reactions?
32. A wave in which the particles of the medium move perpendicularly to the direction the wave is traveling
Transverse Waves
The higher the voltage
What are the 2 most common encountered forms of energy are
Power
33. When force is applied to an object it moves in a straight line and adding force can make it go faster or slow down.
Deca
Newtons 2nd law of motion
Semi - conductors
Straight line motion
34. Reflects the light in one direction
Boron
When light hits a smooth surface
Black
Potential energy
35. Finding that a solution conducts an electric current shows conclusively that the solution...
The tilt of the Earth's axis of rotation relative to the ecliptic
The higher the voltage
Contains ions
Nucleus
36. Uses the transfer of heat from one substance to another to determine the specific heat of the substance.
Calorimeter
Ampmeter
Longitudinal Waves
Hydrocarbons
37. A Compound breaks down into 2 or more simpler substances EX. AB -> A+B
Buret
Static friction
Decomposition reaction
Types of potential energy?
38. Nuclear fission - Nuclear Fusion
types of nuclear reactions?
Chemical bond
Straight line motion
Magnetic field
39. Potential & Kinetic
What are the 2 most common encountered forms of energy are
Series circut
Catalysts
Thermal contact
40. Is the work done divided by the amount of the time it took to do it. P= w/t
Resistance
Evaporation
types of particles in the nucleus?
Power
41. Have properties in between metals and non - metals found in groups 13-16
Transition elements
Metalloids
Protons
Phosphate group
42. The mechanical energy that a body has by virtue of its motion - energy of a moving object.
Kinetic energy
same
Louis Pasteur
When a light hits a rough surface
43. Liter is the base unit of...
Power
Insulator
Volume
birds
44. F - branch of chemistry that deals with the chemical action of electricity and the production of electricity by chemical reactions
Electrochemistry
Kinetic Molecular theory
Ionic Bonds
Heat
45. Electrons in the outermost energy level; they are involved in bond formation
maximum number of electrons that an atom holds with one energy level
Valence electrons
During ____ elements change into other elements change into other elements called _____ elements.
Two types of wave interference are (sound related)
46. The amount of energy required for the liquid at its boiling point to become a gas
Forces on objects at rest
Inside the nucleus
Heat vaporization
Magnetic domains
47. Alkali Metals are the most _____________
Seismographs
chemically active
Doppler effect
First law of thermodynamics
48. Consists of frequency (f) - measured in hertz - and wavelength measured in meters - the frequency times the wavelength of every electromagnetic wave equals the speed of light.
Non - metal
Convection
The electromagnetic spectrum
Ampmeter
49. Resistance is measured in...
Latent heat
OHMS
Chemical bond
Isotopes
50. Is an atom that has all of its electrons in the lowest possible energy levels
Valence electrons
Chemical reactions
Density
Stable electron arrangement