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