SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
Search
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. Measure of the amount of mass per unit volume.
Weight
Energy
Density
Three states of matter
2. 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
Atomic Weight
Elements
Three states of matter
3. Measure of gravitational pull of Earth on an object or between two bodies
Weight
Molecule
Radioisotopes
Solutions
4. 1st (K Shell) = 2 electrons - 2nd (L Shell) = 8 electrons - 3rd (M Shell) = 18 electrons - 4th (N Shell) = 32 electrons
Perpetual Motion
Thermal Energy
Electron Shell Configuration
Isotope
5. Homogeneous mixtures composed of two or more substances that have become one
Physical Changes
Gamma Rays
Solutions
Thermal Energy
6. 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)
Radioisotopes
Radioactive Decay
Solutions
Gamma Rays
7. A Machine that converts thermal energy to mechanical energy that can be used to do work
Physical Changes
Heat Engine
Nuclear Fission
Radioactive Half - life
8. The smallest unit of matter that has the characteristics of an element; consists of three main types of subatomic particles: protons neutrons and electrons.
Atoms
Potential Energy
First Law of Thermodynamics
Most abundant Elements in Universe
9. Isotopes that have not been observed to decay
Physical Changes
Specific Gravity
Work
Stable Isotopes
10. Energy transferred to a body by a means other than work. (through the process of heat)
Mixtures
Thermal Contact
Electron Shell Configuration
Heat Engine
11. Branch of Physics that studies the conversion of energy into work and heat. Concerned w/ variables such as temperature - volume - and pressure
Chemical Change
Mixtures
Isotope
Thermodynamics
12. A misguided belief that a system can continuously produce more energy than it consumes.
Perpetual Motion
Atomic Weight
Water displacement
Thermodynamic Equilibrium
13. 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
Radioactive Isotopes
Elements
Mass
14. Measure of the amount of substance in an object
Radioactive Half - life
Specific Gravity
Mass
Compound
15. Substances that consist of only one type of atom
Elements
Three states of matter
Isolated System (physics)
Density
16. The capacity for doing work that is based upon position or configuration.
Potential Energy
Molecule
Power
Radioactive Decay
17. 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)
Heat
Energy
Isotope
Thermal Contact
18. 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.
Density
Heat Engine
Atoms
Radioisotopes
19. Solid - Liquid - Gas
Radioactivity
Nuclear Fission
Mass
Three states of matter
20. AKA Mass Number. The total number of protons and Neutrons in the nucleus of an atoms. Referred to as 'A.'
Matter
Atomic Weight
Atomic Mass
Radioactive Half - life
21. Total Kinetic Energy and Potential Energy in a system
Gamma Rays
Atoms
Heat
Thermal Energy
22. When energy is emitted by one body and absorbed by another
Thermodynamics
Radiation
Nuclear Fission
Chemical Change
23. 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
Solutions
Power
Chemical Change
Heat
24. 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
Nuclear Fusion
Atomic Mass
Energy
Chemical Properties
25. Refers to everything outside a thermodynamic system.
First Law of Thermodynamics
Water displacement
Surrounding Environment (physics)
Beta Rays
26. Substances that have mass and occupy space
Solutions
Radioactive Decay
Thermal Energy
Matter
27. The capacity to do work
Ionizing Radiation (3 types)
Energy
Radioactive Isotopes
Perpetual Motion
28. Capable of interacting with a surrounding environment and can exchange heat - work (energy) and matter outside their system boundaries
Open Systems (physics)
Surrounding Environment (physics)
Chemical Change
Gamma Rays
29. Conservation of Energy (energy can only be transferred - not created or destroyed)
First Law of Thermodynamics
Stable Isotopes
Compound
Isotope
30. Measurement of Work
Power
Nuclear Fusion
Joule
Radioisotopes
31. Substance containing two or more elements; formed by chemical reactions. Can only be separated by a chemical reaction
Radioactive Isotopes
Compound
Specific Gravity
Thermal Contact
32. The time it takes for half of the radioactive nuclei in a sample to undergo radioactive decay.
Most abundant Elements in Universe
Atoms
Radioactive Half - life
Gamma Rays
33. Rate at which work is performed
Alpha Rays
Power
Beta Rays
Matter
34. Measurement of the amount of cubic space occupied.
Volume
Nuclear Fission
Entropy
Thermal Energy
35. Hydrogen and Helium are the most abundant. Than Oxygen - Neon - Nitrogen - Carbon - Silicon - and Magnesium.
Entropy
Joule
Most abundant Elements in Universe
Volume
36. Splitting of a large nucleus into smaller pieces
Molecule
Weight
Surrounding Environment (physics)
Nuclear Fission
37. 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
Most abundant Elements in Universe
Three states of matter
Potential Energy
38. Causes an electron to detach from an atom; occurs in radioactive reactions. Three types: 1. Alpha 2. Beta 3. Gamma
Joule
Mixtures
Most abundant Elements in Universe
Ionizing Radiation (3 types)
39. Isotopes that have unstable nuclei and can undergo spontaneous nuclear reactions which results in particle or radiation being emitted.
Radioactive Isotopes
Specific Gravity
Thermal Energy
Perpetual Motion
40. Refers to the particles that are emitted from nuclei as a result of nuclear instability
Heat
Radioactivity
Radioactive Decay
Specific Gravity
41. Refers to the energy of an object in motion.
Kinetic Energy
Open Systems (physics)
Potential Energy
Stable Isotopes
42. Contain two or more substances that are combined but have not reacted chemically. They can be separated using physical methods
Physical Changes
Atomic Weight
Mixtures
Electron Shell Configuration
43. How do you determine the volume of an irregularly shaped object?
Water displacement
Thermodynamics
Isolated System (physics)
Mass
44. A System that cannot exchange heat - work - or matter with its surroundings. Total Energy & Mass stay constant w/in system
Isotope
Isolated System (physics)
Chemical Properties
Three states of matter
45. This refers to objects that have the same temperature b/c heat is transferred between them to reach equilibrium
Heat
Radioactive Isotopes
Thermodynamic Equilibrium
Density
46. Attributes such as appearance - color - mass - and volume.
Conservation of Energy
Physical properties
Thermal Energy
Heat
47. A system that can exchange heat and work - but not matter
Ionizing Radiation (3 types)
Closed Systems (physics)
Heat Engine
Surrounding Environment (physics)
48. A change that results in a different substance. They may release or consume energy.
Molecule
Conservation of Energy
Chemical Change
Weight
49. Refers to the fact that the total amount of energy in a closed system is constant
Conservation of Energy
Most abundant Elements in Universe
Atomic Mass
Joule
50. A change that does not result in different substances; when an object changes form but not compostion.
Beta Rays
Physical Changes
Radiation
Surrounding Environment (physics)