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Test your basic knowledge |
Praxis Physics Basic Principles
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. Rate at which work is performed
Weight
Heat Engine
Power
Atomic Mass
2. Refers to the energy of an object in motion.
Solutions
Most abundant Elements in Universe
Thermal Contact
Kinetic Energy
3. How do you determine the volume of an irregularly shaped object?
Water displacement
Most abundant Elements in Universe
Density
Atoms
4. Capable of interacting with a surrounding environment and can exchange heat - work (energy) and matter outside their system boundaries
Atomic Weight
Work
Open Systems (physics)
Energy
5. Conservation of Energy (energy can only be transferred - not created or destroyed)
Chemical Change
First Law of Thermodynamics
Open Systems (physics)
Nuclear Fusion
6. Attributes such as appearance - color - mass - and volume.
Alpha Rays
Volume
Thermodynamic Equilibrium
Physical properties
7. Branch of Physics that studies the conversion of energy into work and heat. Concerned w/ variables such as temperature - volume - and pressure
First Law of Thermodynamics
Surrounding Environment (physics)
Thermodynamics
Thermodynamic Equilibrium
8. Refers to the fact that the total amount of energy in a closed system is constant
Matter
Conservation of Energy
Radioactivity
Radioactive Isotopes
9. The capacity to do work
Energy
Joule
Mass
Chemical Properties
10. Solid - Liquid - Gas
Three states of matter
Atomic Weight
Stable Isotopes
Isotope
11. A misguided belief that a system can continuously produce more energy than it consumes.
Power
Radioactive Half - life
Perpetual Motion
Closed Systems (physics)
12. Contain two or more substances that are combined but have not reacted chemically. They can be separated using physical methods
Radioactive Decay
Chemical Change
Elements
Mixtures
13. A System that cannot exchange heat - work - or matter with its surroundings. Total Energy & Mass stay constant w/in system
Isolated System (physics)
Potential Energy
Entropy
Elements
14. A Machine that converts thermal energy to mechanical energy that can be used to do work
Chemical Change
Entropy
Heat Engine
Radioactive Decay
15. Measure of gravitational pull of Earth on an object or between two bodies
Nuclear Fusion
Weight
Work
Solutions
16. Substances that consist of only one type of atom
Gamma Rays
Energy
First Law of Thermodynamics
Elements
17. Refers to everything outside a thermodynamic system.
Ionizing Radiation (3 types)
Mass
Water displacement
Surrounding Environment (physics)
18. Refers to the amount of energy in a system that is no longer available for work. (also used to describe the amount of disorder in a group)
Entropy
Water displacement
Isotope
Thermal Contact
19. Splitting of a large nucleus into smaller pieces
Chemical Properties
Work
Nuclear Fission
Radioactivity
20. Substance containing two or more elements; formed by chemical reactions. Can only be separated by a chemical reaction
Weight
Solutions
Compound
Radioactive Half - life
21. The measure of the ratio of a substance's density compared to the density of water.
Thermal Energy
Specific Gravity
Work
Entropy
22. 1st (K Shell) = 2 electrons - 2nd (L Shell) = 8 electrons - 3rd (M Shell) = 18 electrons - 4th (N Shell) = 32 electrons
Chemical Properties
Chemical Change
Three states of matter
Electron Shell Configuration
23. The quantity of energy transferred by one system to another due to changes in a system that is the result of external forces; also can be described as the amount of energy that must be transferred to overcome a force.
Heat
Physical Changes
Work
Closed Systems (physics)
24. Measurement of Work
Joule
Power
Radioactive Half - life
Isolated System (physics)
25. Energy transferred to a body by a means other than work. (through the process of heat)
Thermal Contact
Mixtures
Electron Shell Configuration
Radiation
26. Occurs when an unstable atomic nucleus spontaneously loses energy by emitting ionizing particles & radiation. It is a form of energy transfer. Before Decay = parent nuclide After Decay = Daughter nuclide (s)
Density
Volume
Radioisotopes
Radioactive Decay
27. A change that results in a different substance. They may release or consume energy.
Nuclear Fusion
Energy
Radiation
Chemical Change
28. Substances that have mass and occupy space
Heat Engine
Elements
Nuclear Fission
Matter
29. The time it takes for half of the radioactive nuclei in a sample to undergo radioactive decay.
Atomic Weight
Nuclear Fusion
Radioactive Half - life
Potential Energy
30. AKA Mass Number. The total number of protons and Neutrons in the nucleus of an atoms. Referred to as 'A.'
Thermal Energy
Water displacement
Atomic Mass
Beta Rays
31. Measure of the amount of substance in an object
Radioactivity
Mass
Thermodynamics
Thermodynamic Equilibrium
32. Joining of two nuclei; occurs under extreme temperatures and pressure. Fusion occurs naturally in stars (responsible for the release of great energy).
Most abundant Elements in Universe
Beta Rays
Nuclear Fusion
Thermodynamic Equilibrium
33. Transfer of Energy from a body or system as a result of thermal contact. Heat consists of random motion and the vibration of atoms - molecules - & ions. Higher the temperature - greater the atomic/molecular motion
Radiation
Molecule
Heat
Solutions
34. Atoms that have an unstable nucleus that has excess energy and the potential to make radiation particles within the nucleus or undergo radioactive decay which can result in the emission of gamma rays. May occur naturally or artificially produced.
Three states of matter
Thermodynamics
Radioisotopes
Thermal Contact
35. Positive; larger than Beta. Because of their large mass they can be easily stopped (even with a sheet of paper.) Can cause severe damage if ingested.
Alpha Rays
Power
Open Systems (physics)
Thermal Energy
36. Two or more atoms held together by covalent bonds
Specific Gravity
Radioactivity
Molecule
Mixtures
37. Isotopes that have not been observed to decay
Stable Isotopes
Specific Gravity
Beta Rays
Thermal Energy
38. A change that does not result in different substances; when an object changes form but not compostion.
Physical Changes
First Law of Thermodynamics
Radioactivity
Kinetic Energy
39. Total Kinetic Energy and Potential Energy in a system
Power
Thermal Energy
Work
Radiation
40. The capacity for doing work that is based upon position or configuration.
Thermal Contact
Potential Energy
Density
Solutions
41. A variation of an atom; occur when the number of protons in the nucleus are the same but the number of neutrons are not. Written as the element plus the number of Neucleons (i.e. Carbon -13 (6 Protons - 7 Neutrons)
Power
Physical Changes
Atoms
Isotope
42. Causes an electron to detach from an atom; occurs in radioactive reactions. Three types: 1. Alpha 2. Beta 3. Gamma
Electron Shell Configuration
Closed Systems (physics)
Ionizing Radiation (3 types)
Solutions
43. A system that can exchange heat and work - but not matter
Closed Systems (physics)
Physical properties
Atoms
Kinetic Energy
44. Refers to the particles that are emitted from nuclei as a result of nuclear instability
Heat
Radioactivity
Physical Changes
Thermodynamic Equilibrium
45. Measurement of the amount of cubic space occupied.
Molecule
Work
Chemical Properties
Volume
46. Properties concerned with the constituent particles that make up a substance. Can include: Atomic Number - Category - Group - Period - Block - weight - electron configuration - electrons per shell - phase - density - Sublimation point - specific heat
Isolated System (physics)
Chemical Change
Chemical Properties
Physical properties
47. Ratio of the average mass per atom of a sample (which can include various isotopes) to 1/12 of the mass of an atom of carbon -12.
Ionizing Radiation (3 types)
Thermal Energy
Atomic Weight
Atoms
48. Hydrogen and Helium are the most abundant. Than Oxygen - Neon - Nitrogen - Carbon - Silicon - and Magnesium.
Alpha Rays
Most abundant Elements in Universe
Physical properties
Radioactive Half - life
49. When energy is emitted by one body and absorbed by another
Thermal Contact
Radioactive Decay
Radiation
Most abundant Elements in Universe
50. Homogeneous mixtures composed of two or more substances that have become one
Radioisotopes
Solutions
Beta Rays
Atoms