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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. 2 or more substances combine to form a compound EX. A+B -> AB
Composition reaction
Pasteur's postulate
Lewis dot structures
Refraction
2. Which of the following parts of the Sun is easily visible only during a total solar eclipse
Boyles law states
Corona
Longitudinal Waves
Hydrophilic
3. Describes the force of friction of 2 surfaces in contact with eachother . When there is relative motion between the surface.
Chemical properties of metalliods
Energy
Destructive interference
Kinetic Friction
4. The amount of heat it takes to change a solid to a liquid
The electromagnetic spectrum
Heat vaporization
Heat latent
Latent heat
5. 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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6. 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.
Conduction
Corona
Spectrophotometry
Parallel Circut
7. 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.
Calorie
Forces on a moving object
Magnetic field
Non - electrolytes
8. 1. Liquid crystals - when certain solids melt their crystal lattices disintegrate & their particles lose their 3- dimensional pattern. 2. Solid - as a liquid substance cools & forms a solid. The strong attractive forces between oppositely charges ion
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
Boron
Force
A converging lens produces a real image when
9. Is the path along which electrons flow
Calorimeter
Resistance
Circut
Noble gasses
10. The relationship between voltage - current - and resistance - V=IR
The presence of cells in the sample
The tilt of the Earth's axis of rotation relative to the ecliptic
OHMS law
Series circut
11. The amount of energy that it takes to raise one gram of water one degree celsius.
Physical properties of Meralliods
Calorie
Chromatography
Insulin
12. Two or more simple machines working together EX. wheelbarrow it uses level - wheel & axle.
Current
oscilloscope
Compound machines
Metalloids
13. Series circut - Parallel circut
Noble gasses
When a light hits a rough surface
Gay - Lussac's Law
circut types
14. They are neither precise nor accurate.
Electricity charged objects share these characteristics (3)
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?
Refraction
Heat latent
15. The theory that all matter is composed of particles (atoms and molecules) moving constantly in random directions
Chordates
Density
Kinetic Molecular theory
Dynamics
16. They form only over warm oceans
true of hurricanes but not of tornadoes
Magnetic domains
electroscope
Semi - conductors
17. The molecular weight of a substance expressed in grams - measures the amount of a substance
Mole
The intensity of sound is measured in
Types of potential energy?
Group 2 on the periodic table
18. Temporary magnets that lose their magnetism when electric current is removed
Applications of Archimedes principle
Excited electrons
the mass number of an atom
Electromagnets
19. The region around a magnet where the magnetic force is exerted
maximum number of electrons that an atom holds with one energy level
electrostatics
Louis Pasteur
Magnetic field
20. Shiny - softer & less dense. Mostly chemically active
Ions are
Alkali metals are
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?
Atomic number
21. Is done on an object when an applied force moves across a distance.
Atomic mass
Work
Energy
Spectrophotometry
22. A heat that required to change (water from liquid to solid) from one state to another.
Pitch
Heat latent
Difference between metals & non - metals
Applications of Archimedes principle
23. Heat transferred by fluid current
Single replacement reaction
Convection
Kinetic Friction
Forces on a moving object
24. When measuring the volume of water in a graduated cylinder where does one read the measurement?
Heat is transferred in 3 ways
Heat conduction
At the bottom of the meniscus curve
Kinetic Friction
25. Measure of the earth's pull
Boyles law states
Laws of thermodynamic / Laws of conservation
Excited electrons
Weight
26. Solutes that have bonds; no electrically charged species are created when they dissolve in water; glucose; lipids; urea
Resistance
Non - electrolytes
Excited electrons
Laws of thermodynamic / Laws of conservation
27. Change from gas to liquid
Convection
alloy
Condensation
Convection
28. Decibels
Straight line motion
The intensity of sound is measured in
Charles law
Conduction
29. 1. Constructive 2. Destructive
Convection
Heat latent
Two types of wave interference are (sound related)
Types of potential energy?
30. Making and breaking of chemical bonds between atoms bonds involve only the outer electrons & do not effect the nucleus
Destructive interference
Nuclear fission
Chemical reactions
Energy
31. 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
Carbon Dioxide
Kinetic Molecular theory
Celsius
Nuclear energy
32. Number of protons
Insulator
Atomic number
Linear acceleration
birds
33. What are the # of protons in the nucleus of an atom called?
Dynamics
Halogens
Kinetic energy
Atomic number
34. # of protons + # of neutrons
OHMS law
Mass number
Centrifuge
Density
35. Finding that a solution conducts an electric current shows conclusively that the solution...
Contains ions
Parallel Circut
Magnetic field
Pull of gravity
36. Is the transfer of energy by waves such as the electromagnetic waves emitted by stars the sun warms the earth by emitting radiant energy.
Radiation
Series circut
At the bottom of the meniscus curve
Exothermic
37. 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
The intensity of sound is measured in
Milli
Chromatography
OHMS
38. The force of attraction between two objects. Gravity exists not only on earth - but also between planets as well as in black wholes
Mass number
What are the 2 most common encountered forms of energy are
Refraction
Pull of gravity
39. A temperature scale with the freezing point of water 32 degrees and the boiling point of 212 degrees.
Mass
Grounding Charge
Magnetic domains
Fahrenheit
40. 1.) Protons 2.) Neutrons - They both have the same mass - but neutrons have no mass.
Group 1 on the periodic table are all
Difference between metals & non - metals
types of particles in the nucleus?
The tilt of the Earth's axis of rotation relative to the ecliptic
41. Are small positively charged particles
Hecto
Physical properties of Meralliods
Protons
Evaporation
42. Symmetry - crystalline structures are universal - Crystallographic defects - Electrical properties - crystal system
Radioactive Particles
Some characteristics of crystals
Load & switch
Boyles law states
43. A nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy
Heat Fusion
Conduction
When a light hits a rough surface
Nuclear Fusion
44. A functional group consisting of a phosphorus atom covalently bonded to four oxygen atoms. Ideal for energy transfer reactions (ATP).
Phosphate group
Venturi effect
When light hits a smooth and shiny surface
Longitudinal Waves
45. Inclined plane - lever - wheel & axle - pulley.
Simple machines
Heat conduction
chemically active
Push & Pull
46. Where are protons an neutrons located?
Heat conduction
Inside the nucleus
Pull of gravity
64.0 grams
47. 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.
Spectrophotometry
Entropy
Thermal equilibrium
Two types of wave interference are (sound related)
48. Discovered in the late 1800s that micro organisms play a casual role in onset of a disease
Centrifuge
Some Uses of electricity
Louis Pasteur
chemically active
49. A principle that states that for every action there is an equal reaction in the opposite direction
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50. Is the measure of energy temperature is a measure of the heat in an object.
Heat latent
Simple machines
Nuclear energy
Heat