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Test your basic knowledge |
Praxis General Science
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Subjects
:
praxis
,
science
Instructions:
Answer 50 questions in 15 minutes.
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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. 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
oscilloscope
Straight line motion
Hydroxyl group ( Functional group)
2. 1/10 the base unit
Linear acceleration
Noble gasses
Non - metals
Deci
3. Concave
Pitch
Eyeglasses are ____ so the image will hit the retina
Group 2 on the periodic table
Types of Friction & Resistance
4. Series circut - Parallel circut
Excited electrons
Conduction
An electromagnet can be made more powerful in 3 ways
circut types
5. The principle of conservation of energy: Energy can be transferred and transformed - but it cannot be created or destroyed.
Transverse Waves
2nd law of thermodynamics
First law of thermodynamics
Atomic number
6. 1/1000 the base unit
Magnetic domains
Insulator
Milli
Louis Pasteur
7. 1. nuclear reaction 2. radioactive
Centrifuge
During ____ elements change into other elements change into other elements called _____ elements.
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
Weak Electrolytes
8. Change in the apparent frequency of a wave as observer and source move toward or away from each other
Doppler effect
Contains ions
Thermal equilibrium
Decomposition reaction
9. 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.
Deci
Spectrophotometry
Hecto
Specific gravity
10. Average mass of various isotopes of the element.
electroscope
Parallel Circut
Resistance
Atomic mass
11. A unit of heat equal to the amount of heat required to raise the temperature of one kilogram of water by one degree at one atmosphere pressure. used by nutritionists to characterize the energy - producing potential in food
Kilo - calorie
Heat conduction
Halogens
Hecto
12. 1. Have some characteristics of metals & non - metals. 2. Properties do not follow patterns like metals & non - metals.
Chemical reactions
64.0 grams
Chemical properties of metalliods
Corona
13. Measure of the earth's pull
Hecto
Heat Fusion
The intensity of sound is measured in
Weight
14. (physics and chemistry) the smallest component of an element having the chemical properties of the element
Covalent Bonds
Heat
birds
Atom
15. 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
Current
Silicon
Radiation
16. Uses electrical charges of molecules to separate them according to their size the molecules such as DNA or proteins - are pulled through a gel towards either the positive end of the gel box.
same
Newton's 3rd law motion
Electrophoresis
true of hurricanes but not of tornadoes
17. The centripetal force is provided by the high banking of the curved road & by friction between the wheels & the road.
Sonar technology
Chemical bond
Inertia & circular motion
Dynamics
18. A carbon atom linked by a double bond to an oxygen atom. - c=o.
Inside the nucleus
Heat conduction
Mass number
Carbonyl Group (Functional Group)
19. 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.
Series circut
Boron
Convection
Load & switch
20. Electrons that can accept energy from outside sources and move farther away from the nucleus
Excited electrons
Neutrons
Volume
A converging lens produces a real image when
21. Non - metals - group 18 - the most non - reactive elements
Isotopes
Group 1 on the periodic table are all
Avogadros hypothesis
Noble gasses
22. Alkali metals
birds
Group 1 on the periodic table are all
Some substances have no noticeable odor because these substances
Kinetic energy
23. Mass & weight are not the ____ quality
same
Insulin
Pull of gravity
Mass
24. Excess energy is released into the environment
Exothermic
Heat latent
Pascal
Mass
25. Negatively charged particles found outside the nucleus
newtons first law of motion
Electrons
Centrifuge
Kinetic Molecular theory
26. Is a simple device used to indicate the existence of a positive or negative charge.
Evaporation
Celsius
electroscope
Mass number
27. Which of the following parts of the Sun is easily visible only during a total solar eclipse
Composition reaction
Corona
Radiation
Applications of Archimedes principle
28. A material such as glass or porcelain with negligible electrical or thermal conductivity. Electric charges do not move easily - if at all.
Hydroxyl group ( Functional group)
Nuclear fission
Atomic mass
Insulator
29. 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
Nucleus
Transverse Waves
Rubbing
30. Potential & Kinetic
newtons first law of motion
Mole
Neutrons
What are the 2 most common encountered forms of energy are
31. 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.
Pasteur's postulate
The tilt of the Earth's axis of rotation relative to the ecliptic
Forces on objects at rest
Hydroxyl group ( Functional group)
32. A nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy
Nuclear Fusion
Circut
Nuclear reaction
Kinetic energy
33. The sum of the protons and neutrons
Lewis dot structures
the mass number of an atom
sulfhydryl group (Functional Group)
Heat
34. When force is applied to an object it moves in a straight line and adding force can make it go faster or slow down.
Protons
Heat Fusion
Longitudinal Waves
Straight line motion
35. Lacking affinity for water. Repels water. Non - polar
Entropy
Weight
Fahrenheit
Hydrophobic
36. Ratio of the density of a substance to the density of water
Specific gravity
Hydrophilic
What are the 2 most common encountered forms of energy are
electroscope
37. A boulder is sitting at the edge of the cliff it has which type of energy?
Charles law
Atomic number
Push & Pull
Potential energy
38. The amount of heat it takes to change a solid to a liquid
Push & Pull
Latent heat
Weak Electrolytes
Series circut
39. F - branch of chemistry that deals with the chemical action of electricity and the production of electricity by chemical reactions
Electrochemistry
Potential energy
Sonar technology
Pascal
40. It is second element in group 14 - semi - conductor. Sand is made of silicon - it is also used to manufacture glass and cement.
Calorimeter
Carbonyl Group (Functional Group)
Bernoulli principle
Silicon
41. Removal of static electricity by conduction
Atomic number
Kelvin
Grounding Charge
Mole
42. Do not have molecules with one of the two molecular arrangements required to give an odor
Pascal
When light hits a smooth surface
Some substances have no noticeable odor because these substances
Potential difference
43. Shiny - softer & less dense. Mostly chemically active
Current
Alkali metals are
Newtons 2nd law of motion
Hecto
44. Meter is the base unit of...
Specific gravity
Heat conduction
Louis Pasteur
Length
45. The volume of a gas is directly proportional to the temperature of a gas
Types of potential energy?
Heat conduction
An electromagnet can be made more powerful in 3 ways
Charles law
46. (of a chemical reaction or compound) occurring or formed with absorption of heat. Absorbs energy from its surroundings.
Endothermic
Longitudinal Waves
Electromagnets
Law of momentum conservation
47. Organic molecules that are composed of only carbon and hydrogen.
Hydrocarbons
Length
Avogadros hypothesis
chemically active
48. ______ of an atom is equal to the # of protons plus the # of protons plus the # of neutrons
Neutrons
Simple machines
Convection
Atomic mass
49. Describes the force of friction of 2 surfaces in contact with eachother . When there is relative motion between the surface.
Hydrophilic
Pasteur's postulate
Contains ions
Kinetic Friction
50. A free element replaces an element that is a part of a compound. Ex. A +BX -> AX + B
Law of momentum conservation
Chordates
Magnetic domains
Single replacement reaction
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