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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. The time it takes for half of the radioactive nuclei in a sample to undergo radioactive decay.
Heat Engine
Compound
Perpetual Motion
Radioactive Half - life
2. How do you determine the volume of an irregularly shaped object?
Chemical Properties
Water displacement
Thermal Energy
Volume
3. Splitting of a large nucleus into smaller pieces
Open Systems (physics)
Conservation of Energy
Radioisotopes
Nuclear Fission
4. 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)
Three states of matter
Potential Energy
Physical properties
Radioactive Decay
5. A system that can exchange heat and work - but not matter
Power
Closed Systems (physics)
Nuclear Fusion
Surrounding Environment (physics)
6. Substances that consist of only one type of atom
Atoms
Elements
First Law of Thermodynamics
Thermal Contact
7. Substances that have mass and occupy space
Stable Isotopes
Matter
Radioactive Half - life
Surrounding Environment (physics)
8. Refers to the energy of an object in motion.
Molecule
Mass
Kinetic Energy
Atomic Weight
9. Contain two or more substances that are combined but have not reacted chemically. They can be separated using physical methods
Potential Energy
Mixtures
Thermodynamic Equilibrium
First Law of Thermodynamics
10. 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
Kinetic Energy
Thermodynamics
Surrounding Environment (physics)
11. This refers to objects that have the same temperature b/c heat is transferred between them to reach equilibrium
Atomic Mass
Work
Thermodynamic Equilibrium
Closed Systems (physics)
12. The capacity for doing work that is based upon position or configuration.
Solutions
Work
Potential Energy
Mixtures
13. Causes an electron to detach from an atom; occurs in radioactive reactions. Three types: 1. Alpha 2. Beta 3. Gamma
Thermal Energy
Ionizing Radiation (3 types)
Water displacement
Open Systems (physics)
14. Capable of interacting with a surrounding environment and can exchange heat - work (energy) and matter outside their system boundaries
Surrounding Environment (physics)
Thermal Contact
Thermal Energy
Open Systems (physics)
15. Type of High energy electromagnetic radiation consisting of photons. It rids the decaying nucleus of excess energy after it has emitted either alpha or beta radiation. They can cause serious damage to living tissue. It takes thick lead to stop them.
Gamma Rays
Radioactive Decay
Nuclear Fission
Entropy
16. Substance containing two or more elements; formed by chemical reactions. Can only be separated by a chemical reaction
Compound
Radioactivity
Isolated System (physics)
Open Systems (physics)
17. Isotopes that have unstable nuclei and can undergo spontaneous nuclear reactions which results in particle or radiation being emitted.
Radioactive Isotopes
First Law of Thermodynamics
Chemical Properties
Radioactivity
18. Measurement of Work
Joule
Thermodynamic Equilibrium
Mass
Chemical Properties
19. Solid - Liquid - Gas
Radioactive Isotopes
Atoms
Three states of matter
Specific Gravity
20. 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
Physical properties
Chemical Properties
Ionizing Radiation (3 types)
Radioactive Isotopes
21. Attributes such as appearance - color - mass - and volume.
Physical properties
Electron Shell Configuration
Physical Changes
Radioisotopes
22. A System that cannot exchange heat - work - or matter with its surroundings. Total Energy & Mass stay constant w/in system
Density
Isolated System (physics)
Radiation
Atomic Mass
23. When energy is emitted by one body and absorbed by another
Isolated System (physics)
Radiation
Water displacement
Kinetic Energy
24. The capacity to do work
Electron Shell Configuration
Nuclear Fission
Energy
Solutions
25. Homogeneous mixtures composed of two or more substances that have become one
Gamma Rays
Joule
Solutions
Three states of matter
26. AKA Mass Number. The total number of protons and Neutrons in the nucleus of an atoms. Referred to as 'A.'
Atomic Mass
Compound
Thermal Energy
Energy
27. Measurement of the amount of cubic space occupied.
Atomic Mass
Chemical Properties
Heat Engine
Volume
28. 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
Kinetic Energy
Heat
Nuclear Fission
Alpha Rays
29. Branch of Physics that studies the conversion of energy into work and heat. Concerned w/ variables such as temperature - volume - and pressure
Stable Isotopes
Thermal Energy
Thermodynamics
Water displacement
30. Total Kinetic Energy and Potential Energy in a system
Volume
Thermal Energy
Atomic Weight
Specific Gravity
31. 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)
Entropy
Matter
Isotope
Water displacement
32. Rate at which work is performed
Power
Beta Rays
Chemical Change
Heat
33. Conservation of Energy (energy can only be transferred - not created or destroyed)
Open Systems (physics)
First Law of Thermodynamics
Thermodynamic Equilibrium
Potential Energy
34. 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)
Surrounding Environment (physics)
Entropy
Radioactivity
Radioisotopes
35. Two or more atoms held together by covalent bonds
Molecule
Atomic Mass
Matter
Chemical Properties
36. A misguided belief that a system can continuously produce more energy than it consumes.
Conservation of Energy
Entropy
Perpetual Motion
Elements
37. Isotopes that have not been observed to decay
Thermal Energy
Electron Shell Configuration
First Law of Thermodynamics
Stable Isotopes
38. 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.
Water displacement
Nuclear Fusion
Atomic Weight
Isolated System (physics)
39. A change that results in a different substance. They may release or consume energy.
Heat
Chemical Change
Work
Electron Shell Configuration
40. The measure of the ratio of a substance's density compared to the density of water.
Volume
Work
Energy
Specific Gravity
41. Refers to everything outside a thermodynamic system.
Surrounding Environment (physics)
Mixtures
First Law of Thermodynamics
Most abundant Elements in Universe
42. 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.
Radioactive Decay
Work
Joule
Thermal Energy
43. Refers to the particles that are emitted from nuclei as a result of nuclear instability
Kinetic Energy
Atomic Mass
Surrounding Environment (physics)
Radioactivity
44. Measure of gravitational pull of Earth on an object or between two bodies
Matter
Weight
Heat
First Law of Thermodynamics
45. The smallest unit of matter that has the characteristics of an element; consists of three main types of subatomic particles: protons neutrons and electrons.
Compound
Joule
Density
Atoms
46. Measure of the amount of substance in an object
Atomic Weight
Mass
Alpha Rays
Three states of matter
47. Measure of the amount of mass per unit volume.
Thermodynamics
Density
Physical properties
Atomic Weight
48. A change that does not result in different substances; when an object changes form but not compostion.
Physical Changes
Perpetual Motion
Atoms
Thermodynamic Equilibrium
49. Joining of two nuclei; occurs under extreme temperatures and pressure. Fusion occurs naturally in stars (responsible for the release of great energy).
Chemical Change
Nuclear Fusion
Beta Rays
Atomic Weight
50. 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.
Radioactive Half - life
Radioisotopes
Heat Engine
Specific Gravity