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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. Potential & Kinetic
Nuclear reaction
The presence of cells in the sample
What are the 2 most common encountered forms of energy are
Conduction
2. Is the change from liquid to gas.
Single replacement reaction
Atom
Evaporation
Group 1 on the periodic table are all
3. A mixture containing two or more metallic elements or metallic and nonmetallic elements usually fused together or dissolving into each other when molten Ex. Brass is an alloy of zinc and copper
Entropy
alloy
Mole
Types of Friction & Resistance
4. When you step out of the shower the floor feels colder on your feet than the bathmat. Because heat is ______________ to the floor.
Deca
conducted more easily
Conduction
Chemical reactions
5. Animals in which of the following groups may have a backbone and a spinal cord?
potential energy
Spectrophotometry
Deca
Chordates
6. The transfer of heat by electromagnetic waves is called?
electrostatics
Destructive interference
Radiation
Venturi effect
7. The interference that occurs when two waves combine to make a wave with a larger amplitude
chemically active
Catalysts
Constructive interference
Potential difference
8. The property of sound that varies with variation in the frequency of vibration.
Mass
Pitch
Heat latent
Heat conduction
9. 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?
Grounding Charge
The presence of cells in the sample
Mass
Heat Fusion
10. F - branch of chemistry that deals with the chemical action of electricity and the production of electricity by chemical reactions
Valence electrons
Carbon Dioxide
Resistance
Electrochemistry
11. The interference that occurs when two waves combine to make a wave with a smaller amplitude
Atomic mass
Destructive interference
Boyles law states
Insulin
12. Gram is the base unit of...
Mass
Condensation
oscilloscope
Hydrocarbons
13. A Compound breaks down into 2 or more simpler substances EX. AB -> A+B
Decomposition reaction
Electrochemistry
Potential difference
Condensation
14. Making and breaking of chemical bonds between atoms bonds involve only the outer electrons & do not effect the nucleus
Chemical reactions
types of nuclear reactions?
Forces on a moving object
Buret
15. Is the study of the relationship between motion & the forces affecting motion.
Kinetic Molecular theory
Refraction
Phosphate group
Dynamics
16. 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.
3rd law of thermodynamics
Radiation
Buret
Isotopes
17. Force of attraction that holds atoms together - when atoms are bonded chemically they give up their individual properties.
Isotopes
Static friction
Centrifuge
Chemical bond
18. 10x the base unit
Linear acceleration
Deca
At the bottom of the meniscus curve
Applications of Archimedes principle
19. Resistance is measured in...
Seismographs
OHMS
Circut
Neutrons
20. Heat energy that is transferred into or out of a system
Contains ions
Electromagnets
Heat transfer
Stable electron arrangement
21. Atoms of the same element that have different numbers of neutrons
Alkaline earth metals are
Difference between metals & non - metals
Isotopes
Heat is transferred in 3 ways
22. Parts of 2 compounds replace each other. Ex. Switch partners AX + BY -> AY + BX
Double replacement Reactions
64.0 grams
Water
At the bottom of the meniscus curve
23. Small uncharged particles in the nucleus they are neutral
chemically active
Potential difference
Neutrons
Charles law
24. An isotope has a different number of...
Atomic number
Heat latent
Neutrons
electrostatics
25. Solids - gasses - and 1 liquid (Bromine)
oscilloscope
Non - metals
Neutrons
Stable electron arrangement
26. P1/T1=P2/T2. States that the pressure of a fixed amount of gas in a fixed volume is proportional to its temperature.
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27. 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 -
Entropy
true of hurricanes but not of tornadoes
Some Uses of electricity
Atomic number
28. Which of the following parts of the Sun is easily visible only during a total solar eclipse
Newtons 2nd law of motion
Corona
Valence electrons
Ampmeter
29. Electrons that can accept energy from outside sources and move farther away from the nucleus
isotopes of each other
Radiation
Halogens
Excited electrons
30. 1/10 the base unit
First law of thermodynamics
Deci
Types of kinetic energy?
Density
31. It scatters light in many directions
Newton's 3rd law motion
When a light hits a rough surface
chemically active
Direct Variations
32. Record vibrations in earth & allow us to measure earthquake activity.
Atomic number
Group 2 on the periodic table
Seismographs
Length
33. Is an atom that has all of its electrons in the lowest possible energy levels
Work
Venturi effect
Stable electron arrangement
Fahrenheit
34. A wave in which the particles of the medium move perpendicularly to the direction the wave is traveling
As the train approaches and blasts its whistle - the whistle sounds..
Transverse Waves
A converging lens produces a real image when
birds
35. When force is applied to an object it moves in a straight line and adding force can make it go faster or slow down.
Evaporation
Straight line motion
Hydrophobic
Calorimeter
36. Atoms with an equal # of protons and electrons.
Ions are
Non - electrolytes
Magnetic field
Boron
37. Solutes that have bonds; no electrically charged species are created when they dissolve in water; glucose; lipids; urea
Non - electrolytes
Radioactive Particles
Centrifuge
Potential energy
38. 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
Non - metals
Neutrons
Venturi effect
Sonar technology
39. Organic molecules that are composed of only carbon and hydrogen.
Hydrocarbons
Two types of wave interference are (sound related)
Calorie
Carbonyl Group (Functional Group)
40. A temperature scale with the freezing point of water 32 degrees and the boiling point of 212 degrees.
Valence electrons
Noble gasses
Fahrenheit
Rubbing
41. The volume of a gas is directly proportional to the temperature of a gas
Charles law
Water
Isotopes
Insulator
42. Excess energy is released into the environment
Atomic number
potential energy
Exothermic
Pull of gravity
43. 1. Make more coils - 2. put an iron cover (nail) inside the coils - use more battery power
Kinetic Friction
The higher the voltage
An electromagnet can be made more powerful in 3 ways
Doppler effect
44. The amount of energy required for the liquid at its boiling point to become a gas
Heat vaporization
Specific gravity
Pascal
Forces on a moving object
45. A functional group consisting of a sulfur atom bonded to a hydrogen atom (
sulfhydryl group (Functional Group)
Laws of thermodynamic / Laws of conservation
Radiation
Physical properties of Meralliods
46. The theory that all matter is composed of particles (atoms and molecules) moving constantly in random directions
Atom
Sonar technology
conducted more easily
Kinetic Molecular theory
47. Electrons in the outermost energy level; they are involved in bond formation
Push & Pull
Valence electrons
Stable electron arrangement
Milli
48. Electronic equipment that provides visual images of varying electrical quantities - Useful in studying waves b/c it gives a picture of the wave.
Insulator
During ____ elements change into other elements change into other elements called _____ elements.
oscilloscope
Atomic mass
49. # of electrons. Non - metals have 4-8 electrons in their outermost energy.
Buret
Difference between metals & non - metals
Phosphate group
Pascal
50. The process of heat transfer via solid contact
OHMS
Isotopes
Heat conduction
Law of momentum conservation
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