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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. The mechanical energy that a body has by virtue of its motion - energy of a moving object.
Eyeglasses are ____ so the image will hit the retina
Kinetic energy
sulfhydryl group (Functional Group)
Heat is transferred in 3 ways
2. Liter is the base unit of...
Radioactive Particles
Non - metals
Volume
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?
On the periodic table which elements are grouped by color
Forces on a moving object
Lewis dot structures
Linear acceleration
4. A functional group consisting of a sulfur atom bonded to a hydrogen atom (
Atomic mass
Electricity charged objects share these characteristics (3)
sulfhydryl group (Functional Group)
Circut
5. They are neither precise nor accurate.
2nd law of thermodynamics
Halogens
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?
Direct Variations
6. Is the work done divided by the amount of the time it took to do it. P= w/t
Circut
Power
OHMS
Group 1 on the periodic table are all
7. Electrons that can accept energy from outside sources and move farther away from the nucleus
Heat latent
Physical properties of Meralliods
Excited electrons
Silicon
8. ______ of an atom is equal to the # of protons plus the # of protons plus the # of neutrons
Hydrophilic
Deca
Rubbing
Atomic mass
9. 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.
Applications of Archimedes principle
Buret
Protons
Compound machines
10. A gelatinous sample of material from a previously unexplored marine environment is thought to be living or to be composed of recently living material. Which of the following would most clearly confirm that the material has a biological origin?
The presence of cells in the sample
types of nuclear reactions?
isotopes of each other
Potential difference
11. Mass of the substance contained per unit of volume
Electrochemistry
Bernoulli principle
Density
The presence of cells in the sample
12. Nuclear fission - Nuclear Fusion
types of nuclear reactions?
Deca
Convection
Chemical properties of metalliods
13. The interference that occurs when two waves combine to make a wave with a larger amplitude
Deca
Constructive interference
Milli
Sonar technology
14. Describes the force of friction of 2 surfaces in contact with eachother . When there is relative motion between the surface.
Louis Pasteur
newtons first law of motion
Neutrons
Kinetic Friction
15. '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
Carbon Dioxide
Radiation
newtons first law of motion
As the train approaches and blasts its whistle - the whistle sounds..
16. The process of heat transfer via solid contact
isotopes of each other
alloy
Endothermic
Heat conduction
17. Lacking affinity for water. Repels water. Non - polar
Conduction
Push & Pull
Hydrophobic
oscilloscope
18. Polar molecules
Centrifuge
Static friction
Hydrophilic
Deca
19. Is a simple device used to indicate the existence of a positive or negative charge.
electroscope
Milli
Sonar technology
Bernoulli principle
20. A free element replaces an element that is a part of a compound. Ex. A +BX -> AX + B
Ions are
Resistance
Non - metals
Single replacement reaction
21. Measures the amount of matter in an object
Mass number
Pitch
Metalloids
Mass
22. A material such as glass or porcelain with negligible electrical or thermal conductivity. Electric charges do not move easily - if at all.
Insulator
Covalent Bonds
Dynamics
Ampmeter
23. The more energy the electrons have
Lewis dot structures
Types of potential energy?
Conduction
The higher the voltage
24. Carbon atom - atomic number 6 - atomic mass 11
isotopes of each other
Phases of matter
Isotopes
Avogadros hypothesis
25. Specific gravity is the ratio based on...
Pull of gravity
Density
types of particles in the nucleus?
Isotopes
26. 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.
Heat vaporization
Non - metal
Static friction
Forces on objects at rest
27. Potential & Kinetic
maximum number of electrons that an atom holds with one energy level
What are the 2 most common encountered forms of energy are
Evaporation
Exothermic
28. Temporary magnets that lose their magnetism when electric current is removed
During ____ elements change into other elements change into other elements called _____ elements.
The intensity of sound is measured in
Heat
Electromagnets
29. Transfer of thermal energy with in a fluid. The particles in a fluid transfer the thermal energy from hot areas to cooler areas EX. the warmed up rising air from a heat source such as a fire or electric heater.
Magnetic domains
Noble gasses
Convection
Nuclear fission
30. Removal of static electricity by conduction
Grounding Charge
Fahrenheit
Convection
Mass
31. Equal volumes of gases at the same temperature and pressure contain equal numbers of particles
Avogadros hypothesis
Kilo
Ampmeter
newtons first law of motion
32. 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
circut types
Mass number
Pitch
Centrifuge
33. Force of attraction that holds atoms together - when atoms are bonded chemically they give up their individual properties.
Destructive interference
Mass number
Chemical bond
Celsius
34. 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.
Deca
Phosphate group
Forces on a moving object
Chromatography
35. What quantity of oxygen - O2 - contains very nearly the same number of molecules as 36.0 grams of water - H2O?
Endothermic
Inside the nucleus
Protons
64.0 grams
36. Average mass of various isotopes of the element.
Charles law
Electrophoresis
Power
Atomic mass
37. 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.
Kinetic Friction
Transverse Waves
oscilloscope
The electromagnetic spectrum
38. Pushing a vacuum cleaner or pulling a bowstring applies muscular force when the muscles expand & contract elastic force occurs when an object returns to its original shape (for example - when a bow is released)
Push & Pull
oscilloscope
Deca
Mass
39. Organic molecules that are composed of only carbon and hydrogen.
Hydrocarbons
Eyeglasses are ____ so the image will hit the retina
Longitudinal Waves
Pascal
40. Elements in the middle of the periodic table - in groups 3-12.
Work
oscilloscope
Transition elements
Insulin
41. Substance that dissociates completely into its ions when added to water and conducts electricity well.
Deci
Strong electrolytes
true of hurricanes but not of tornadoes
Carbonyl Group (Functional Group)
42. Do not have molecules with one of the two molecular arrangements required to give an odor
Some substances have no noticeable odor because these substances
Chemical bond
Strong electrolytes
Nuclear energy
43. A wave in which the particles move parallel to the path of the wave
Longitudinal Waves
Alkaline earth metals are
Hydrophilic
Thermal equilibrium
44. Atoms with an equal # of protons and electrons.
Ions are
Refraction
Energy
Kelvin
45. Is formed when 2 atoms share electrons - covalent bonding happens among non - metals.
Calorimeter
During ____ elements change into other elements change into other elements called _____ elements.
Longitudinal Waves
Covalent Bonds
46. The amount of energy required to change a substance from the solid phase to the liquid phase at its melting point
isotopes of each other
Dynamics
Single replacement reaction
Heat Fusion
47. Pressure is measures in a unit called
Ampmeter
Pull of gravity
circut types
Pascal
48. 1.) Protons 2.) Neutrons - They both have the same mass - but neutrons have no mass.
types of particles in the nucleus?
Straight line motion
Pitch
The tilt of the Earth's axis of rotation relative to the ecliptic
49. Inclined plane - lever - wheel & axle - pulley.
Thermal contact
The electromagnetic spectrum
birds
Simple machines
50. The monovalent group - OH in such compounds as bases and some acids and alcohols. Makes the molecule polar which increases the solubility of a compound.
Direct Variations
Inertia & circular motion
Endothermic
Hydroxyl group ( Functional group)