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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. Measure of the disorder or randomness of the particles that make of a system (measurement of movement of particles in a spontaneous reaction) EX. entropy increases as matter and energy in the universe degrade to an ultimate state of inert uniformity.
Hydrophobic
Composition reaction
Entropy
Specific gravity
2. (of a chemical reaction or compound) occurring or formed with absorption of heat. Absorbs energy from its surroundings.
Endothermic
Decomposition reaction
Physical properties of Meralliods
The electromagnetic spectrum
3. Is the work done divided by the amount of the time it took to do it. P= w/t
Work
Power
electroscope
Isotopes
4. A functional group consisting of a phosphorus atom covalently bonded to four oxygen atoms. Ideal for energy transfer reactions (ATP).
Pitch
Pull of gravity
Grounding Charge
Phosphate group
5. The number of electrons per second that flow past a point in a circut.
Neutrons
Current
true of hurricanes but not of tornadoes
Milli
6. Temporary magnets that lose their magnetism when electric current is removed
Resistance
Latent heat
Electromagnets
As the train approaches and blasts its whistle - the whistle sounds..
7. A principle that states that for every action there is an equal reaction in the opposite direction
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8. 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
The higher the voltage
Thermal equilibrium
Atom
Carbon Dioxide
9. Is a simple device used to indicate the existence of a positive or negative charge.
Thermal equilibrium
electroscope
Some characteristics of crystals
types of nuclear reactions?
10. What are the # of protons in the nucleus of an atom called?
Transverse Waves
Water
Avogadros hypothesis
Atomic number
11. The buoyant force on an object is equal to the weight of the fluid displaced by the object
Types of Friction & Resistance
Potential difference
maximum number of electrons that an atom holds with one energy level
Archimedes principle
12. Measures the amount of matter in an object
When light hits a smooth and shiny surface
Conduction
3rd law of thermodynamics
Mass
13. An object's _____ gives it resistance to change its current state of motion it is also the measure of an objects resistance to acceleration.
Inertia & circular motion
Mass
Potential energy
Condensation
14. The mechanical energy that a body has by virtue of its position Ex. Stored energy -
potential energy
Halogens
On the periodic table which elements are grouped by color
Electromagnets
15. A temperature scale with the freezing point of water 32 degrees and the boiling point of 212 degrees.
Atomic number
Fahrenheit
Current
Chemical properties of metalliods
16. 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?
Constructive interference
The presence of cells in the sample
Energy
Current
17. Stored mechanical - Nuclear - Chemical - gravitational
Static friction
Non - metal
Types of potential energy?
birds
18. Not as easy to recognize as metal bc they do not always share physical properties. They are dull - brittle - & not good conductors of heat
Non - metal
Lewis dot structures
Nuclear reaction
OHMS law
19. A material such as glass or porcelain with negligible electrical or thermal conductivity. Electric charges do not move easily - if at all.
Centrifuge
Current
Calorie
Insulator
20. 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.
Circut
Forces on objects at rest
electroscope
Archimedes principle
21. Clustered regions of aligned magnetic atoms. When these regions are aligned with one another - the substance containing them is a magnet.
Types of kinetic energy?
Magnetic domains
Compound machines
Chordates
22. The process of heat transfer via solid contact
Thermal equilibrium
Strong electrolytes
Heat conduction
Law of momentum conservation
23. They form only over warm oceans
Static friction
true of hurricanes but not of tornadoes
Direct Variations
Current
24. (physics) the capacity of a physical system to do work - or supply heat.
Energy
Inertia & circular motion
Alkaline earth metals are
Atomic number
25. When force is applied to an object it moves in a straight line and adding force can make it go faster or slow down.
Magnetic domains
Straight line motion
alloy
Ions are
26. Potential & Kinetic
Halogens
What are the 2 most common encountered forms of energy are
Types of potential energy?
Refraction
27. Electrons that can accept energy from outside sources and move farther away from the nucleus
Excited electrons
Evaporation
alloy
Mass
28. The volume of a gas is directly proportional to the temperature of a gas
When light hits a smooth surface
Load & switch
Charles law
Specific gravity
29. A circut with two or more resistors where the electricity has more than one path to travel
Bernoulli principle
Parallel Circut
Archimedes principle
Calorimeter
30. The region around a magnet where the magnetic force is exerted
Magnetic field
Condensation
Law of momentum conservation
Alkali metals are
31. That for a fixed amount of gas at a constant temperature - the volume of a gas increases as its pressure decreases
Semi - conductors
Boyles law states
Latent heat
Kilo - calorie
32. 1. Constructive 2. Destructive
Two types of wave interference are (sound related)
Static friction
Mass
When light hits a smooth and shiny surface
33. Meter is the base unit of...
chemically active
Chordates
Pascal
Length
34. Average mass of various isotopes of the element.
Atomic mass
Condensation
Refraction
Eyeglasses are ____ so the image will hit the retina
35. 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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36. The centripetal force is provided by the high banking of the curved road & by friction between the wheels & the road.
Inertia & circular motion
birds
Non - metal
An electromagnet can be made more powerful in 3 ways
37. A boulder is sitting at the edge of the cliff it has which type of energy?
Force
Spectrophotometry
Potential energy
Load & switch
38. 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.
Gay - Lussac's Law
potential energy
Physical properties of Meralliods
Archimedes principle
39. 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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40. 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.
Kelvin
Spectrophotometry
Seismographs
As the train approaches and blasts its whistle - the whistle sounds..
41. An isotope has a different number of...
Pull of gravity
Force
Heat
Neutrons
42. Solids - gasses - and 1 liquid (Bromine)
Work
Applications of Archimedes principle
Non - metals
Current
43. Elements in the middle of the periodic table - in groups 3-12.
Transition elements
Specific gravity
At the bottom of the meniscus curve
Celsius
44. 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 -
Gay - Lussac's Law
Halogens
Some Uses of electricity
Atomic mass
45. Pressure is measures in a unit called
Condensation
Charles law
Resistance
Pascal
46. Negatively charged particles found outside the nucleus
Volume
Types of Friction & Resistance
Electrons
Covalent Bonds
47. 1/10 the base unit
Deci
the mass number of an atom
Covalent Bonds
birds
48. 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.
The tilt of the Earth's axis of rotation relative to the ecliptic
Circut
Buret
Potential energy
49. Which of the following parts of the Sun is easily visible only during a total solar eclipse
Group 2 on the periodic table
Water
Kinetic energy
Corona
50. The molecular weight of a substance expressed in grams - measures the amount of a substance
Difference between metals & non - metals
Mole
Deca
Heat vaporization