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Praxis General Science
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Subjects
:
praxis
,
science
Instructions:
Answer 50 questions in 15 minutes.
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study here
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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 transfer of heat by electromagnetic waves is called?
Exothermic
Radiation
Newtons 2nd law of motion
Inside the nucleus
2. F - branch of chemistry that deals with the chemical action of electricity and the production of electricity by chemical reactions
Electrochemistry
Hydrocarbons
Non - metals
OHMS
3. Is the path along which electrons flow
Alkali metals are
Some substances have no noticeable odor because these substances
Centrifuge
Circut
4. 1. Have some characteristics of metals & non - metals. 2. Properties do not follow patterns like metals & non - metals.
Catalysts
Celsius
alloy
Chemical properties of metalliods
5. 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.
Neutrons
The electromagnetic spectrum
Spectrophotometry
Strong electrolytes
6. 1. Like charges repel one another - 2. Opposite charges attract each other - 3. charge is considered a neutral object has no net charge.
Electricity charged objects share these characteristics (3)
Pitch
newtons first law of motion
Magnetic field
7. Is the work done divided by the amount of the time it took to do it. P= w/t
Forces on a moving object
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?
Power
A converging lens produces a real image when
8. A free element replaces an element that is a part of a compound. Ex. A +BX -> AX + B
Electrophoresis
The presence of cells in the sample
Magnetic field
Single replacement reaction
9. 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)
Magnetic field
Inertia & circular motion
Push & Pull
The intensity of sound is measured in
10. Force of attraction that holds atoms together - when atoms are bonded chemically they give up their individual properties.
Chemical bond
Chromatography
Electricity charged objects share these characteristics (3)
electroscope
11. Small uncharged particles in the nucleus they are neutral
Types of potential energy?
Neutrons
isotopes of each other
Circut
12. 1000x the base unit
Kilo
Kilo - calorie
Nuclear fission
Stable electron arrangement
13. Electrical - Light (radiant) - Heat (thermal) - Movement
Force
Entropy
Types of kinetic energy?
What are the 2 most common encountered forms of energy are
14. 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.
Black
Bernoulli principle
Forces on a moving object
Hydrophilic
15. Stored mechanical - Nuclear - Chemical - gravitational
Alkaline earth metals are
Types of potential energy?
Magnetic field
isotopes of each other
16. Discovered in the late 1800s that micro organisms play a casual role in onset of a disease
alloy
Pascal
Louis Pasteur
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
17. Causes motion
Heat vaporization
Force
Decomposition reaction
Electricity charged objects share these characteristics (3)
18. ______ of an atom is equal to the # of protons plus the # of protons plus the # of neutrons
Insulin
Atomic mass
Metalloids
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?
19. 1/1000 the base unit
Alkali metals are
alloy
Milli
Entropy
20. (physics) the capacity of a physical system to do work - or supply heat.
Energy
Latent heat
Radiation
Atomic mass
21. Way of keeping tract of valence electrons
Non - metal
Lewis dot structures
Boron
Deca
22. Solids - gasses - and 1 liquid (Bromine)
Non - metals
Bernoulli principle
The electromagnetic spectrum
Destructive interference
23. The object is further than one focal length from the lens
A converging lens produces a real image when
The electromagnetic spectrum
On the periodic table which elements are grouped by color
Potential difference
24. 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
Neutrons
Energy
Kinetic energy
25. The mechanical energy that a body has by virtue of its position Ex. Stored energy -
Resistance
potential energy
At the bottom of the meniscus curve
Kilo - calorie
26. 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.
Transition elements
Pasteur's postulate
Spectrophotometry
Isotopes
27. Elements in the middle of the periodic table - in groups 3-12.
Transition elements
Current
Conduction
Conduction
28. Alkali Metals are the most _____________
Compound machines
Heat Fusion
Transverse Waves
chemically active
29. It is second element in group 14 - semi - conductor. Sand is made of silicon - it is also used to manufacture glass and cement.
Composition reaction
Silicon
Push & Pull
Radiation
30. Gram is the base unit of...
Mass
same
Double replacement Reactions
Simple machines
31. A nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy
On the periodic table which elements are grouped by color
Nuclear Fusion
Conduction
Nuclear fission
32. The interference that occurs when two waves combine to make a wave with a smaller amplitude
Nuclear fission
An electromagnet can be made more powerful in 3 ways
2nd law of thermodynamics
Destructive interference
33. A nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy
Grounding Charge
Parallel Circut
Nuclear fission
The presence of cells in the sample
34. Ratio of the density of a substance to the density of water
Latent heat
Electrophoresis
Eyeglasses are ____ so the image will hit the retina
Specific gravity
35. The mechanical energy that a body has by virtue of its motion - energy of a moving object.
Phases of matter
Corona
Kinetic energy
Non - metal
36. It is the first element in group 13 - is a poor conductor of electricity at low temperature - however if temperature increases it will become a good conductor.
Refraction
Nuclear energy
Boron
Pasteur's postulate
37. Series circut - Parallel circut
Atom
Non - metal
Heat conduction
circut types
38. Electrons that can accept energy from outside sources and move farther away from the nucleus
Excited electrons
Static friction
Forces on objects at rest
Charles law
39. '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
Heat
When a light hits a rough surface
newtons first law of motion
Nuclear Fusion
40. Is formed when 2 atoms share electrons - covalent bonding happens among non - metals.
Halogens
Covalent Bonds
Atomic number
The tilt of the Earth's axis of rotation relative to the ecliptic
41. The force of attraction between two objects. Gravity exists not only on earth - but also between planets as well as in black wholes
Pull of gravity
Electrons
types of nuclear reactions?
Single replacement reaction
42. 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.
types of nuclear reactions?
Hydroxyl group ( Functional group)
Series circut
alloy
43. Is the change from liquid to gas.
Evaporation
Kilo - calorie
Kinetic Friction
Density
44. Alkaline earth metals
types of particles in the nucleus?
Group 2 on the periodic table
Strong electrolytes
Parallel Circut
45. Electronic equipment that provides visual images of varying electrical quantities - Useful in studying waves b/c it gives a picture of the wave.
Electrons
Latent heat
Two types of wave interference are (sound related)
oscilloscope
46. (physics) a process that alters the energy or structure or composition of atomic nuclei - When a reaction involves the nucleus - elements become different thus is called a nuclear reaction.
Semi - conductors
Heat conduction
Nuclear reaction
Decomposition reaction
47. (physics and chemistry) the smallest component of an element having the chemical properties of the element
circut types
chemically active
Milli
Atom
48. Measures the amount of matter in an object
Density
3rd law of thermodynamics
Non - metal
Mass
49. Is a simple device used to indicate the existence of a positive or negative charge.
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?
electroscope
Group 1 on the periodic table are all
Kinetic energy
50. A functional group consisting of a phosphorus atom covalently bonded to four oxygen atoms. Ideal for energy transfer reactions (ATP).
2nd law of thermodynamics
Law of momentum conservation
Carbon Dioxide
Phosphate group
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