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Test your basic knowledge |
Praxis General Science
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. Atoms with an equal # of protons and electrons.
Charles law
Radioactive Particles
Ions are
Potential difference
2. Static friction - Kinetic friction - Push & pull - rubbing - pull of gravity - forces on objects at rest - forces on a moving object - inertia & circular motion.
Electricity charged objects share these characteristics (3)
Convection
Law of momentum conservation
Types of Friction & Resistance
3. The more energy the electrons have
Kelvin
Heat
The higher the voltage
Celsius
4. The center of the atom.
Non - metals
Kinetic energy
Ionic Bonds
Nucleus
5. Equal volumes of gases at the same temperature and pressure contain equal numbers of particles
Newton's 3rd law motion
Avogadros hypothesis
When light hits a smooth surface
Electrochemistry
6. The relationship between voltage - current - and resistance - V=IR
OHMS law
oscilloscope
Heat
sulfhydryl group (Functional Group)
7. What are the # of protons in the nucleus of an atom called?
Doppler effect
Atomic number
Grounding Charge
Silicon
8. (of a chemical reaction or compound) occurring or formed with absorption of heat. Absorbs energy from its surroundings.
Linear acceleration
Non - metals
Corona
Endothermic
9. Alkaline earth metals
Law of momentum conservation
Linear acceleration
When light hits a smooth and shiny surface
Group 2 on the periodic table
10. Measure of the earth's pull
Nuclear fission
Types of Friction & Resistance
An electromagnet can be made more powerful in 3 ways
Weight
11. Non - metals - group 18 - the most non - reactive elements
Physical properties of Meralliods
The tilt of the Earth's axis of rotation relative to the ecliptic
Noble gasses
potential energy
12. Electronic equipment that provides visual images of varying electrical quantities - Useful in studying waves b/c it gives a picture of the wave.
oscilloscope
Some substances have no noticeable odor because these substances
Non - metals
The true length of a block of wood is 1.010 cm. Three measurements of this block produced the following values: 1.4 cm - 1.2 cm - and 0.9 cm. Which of the following statements is true concerning these measurements?
13. Is the transfer of energy by waves such as the electromagnetic waves emitted by stars the sun warms the earth by emitting radiant energy.
Radiation
Carbonyl Group (Functional Group)
OHMS law
Inertia & circular motion
14. Substance that dissociates completely into its ions when added to water and conducts electricity well.
Strong electrolytes
Charles law
Avogadros hypothesis
Atomic mass
15. Organic molecules that are composed of only carbon and hydrogen.
Hydrocarbons
Straight line motion
Semi - conductors
2nd law of thermodynamics
16. Is the study of the relationship between motion & the forces affecting motion.
Push & Pull
Simple machines
true of hurricanes but not of tornadoes
Dynamics
17. Average mass of various isotopes of the element.
Atomic mass
Types of kinetic energy?
The tilt of the Earth's axis of rotation relative to the ecliptic
Metalloids
18. The branch of physics that deals with static electricity - study of stationary electric charges.
Direct Variations
electrostatics
Conduction
Hydrophobic
19. Solutes that have bonds; no electrically charged species are created when they dissolve in water; glucose; lipids; urea
Alkali metals are
Non - electrolytes
Atom
true of hurricanes but not of tornadoes
20. Mass of the substance contained per unit of volume
Density
Thermal equilibrium
Bernoulli principle
Length
21. Way of keeping tract of valence electrons
Potential energy
Lewis dot structures
The tilt of the Earth's axis of rotation relative to the ecliptic
Hecto
22. A boulder is sitting at the edge of the cliff it has which type of energy?
Boyles law states
Black
conducted more easily
Potential energy
23. Number of protons
types of particles in the nucleus?
Pull of gravity
Atomic number
Neutrons
24. The amount of energy required to change a substance from the solid phase to the liquid phase at its melting point
Energy
Weight
Chemical reactions
Heat Fusion
25. Current is measured with a device called...
Pasteur's postulate
Alkaline earth metals are
Entropy
Ampmeter
26. It scatters light in many directions
alloy
Avogadros hypothesis
When a light hits a rough surface
Inside the nucleus
27. A free element replaces an element that is a part of a compound. Ex. A +BX -> AX + B
Protons
Types of kinetic energy?
Inside the nucleus
Single replacement reaction
28. The difference in electrical charge between two points in a circuit expressed in volt. When an electron goes through a load it does work & loses some energy.
Heat is transferred in 3 ways
3rd law of thermodynamics
Potential difference
Forces on a moving object
29. A temperature scale with the freezing point of water 32 degrees and the boiling point of 212 degrees.
conducted more easily
Fahrenheit
Force
Weight
30. # of electrons. Non - metals have 4-8 electrons in their outermost energy.
Difference between metals & non - metals
Types of Friction & Resistance
Group 2 on the periodic table
Alkali metals are
31. Uses electrical charges of molecules to separate them according to their size the molecules such as DNA or proteins - are pulled through a gel towards either the positive end of the gel box.
Applications of Archimedes principle
Electrophoresis
Weak Electrolytes
Electromagnets
32. The total entropy of a system plus that of its surroundings always increase.
2nd law of thermodynamics
Latent heat
Force
Heat Fusion
33. Clustered regions of aligned magnetic atoms. When these regions are aligned with one another - the substance containing them is a magnet.
types of particles in the nucleus?
Valence electrons
Magnetic domains
Volume
34. Electrical - Light (radiant) - Heat (thermal) - Movement
Electrons
Types of kinetic energy?
Exothermic
Boyles law states
35. Elements in the middle of the periodic table - in groups 3-12.
Parallel Circut
Newton's 3rd law motion
Transition elements
Physical properties of Meralliods
36. Series circut - Parallel circut
Push & Pull
Fahrenheit
Deca
circut types
37. Not as easy to recognize as metal bc they do not always share physical properties. They are dull - brittle - & not good conductors of heat
Kilo - calorie
Ionic Bonds
Non - metal
What are the 2 most common encountered forms of energy are
38. 1. nuclear reaction 2. radioactive
Rubbing
During ____ elements change into other elements change into other elements called _____ elements.
Black
Entropy
39. The sum of the protons and neutrons
Eyeglasses are ____ so the image will hit the retina
the mass number of an atom
Sonar technology
Hydroxyl group ( Functional group)
40. Heat absorbed or radiated during a change of phase at a constant temperature and pressure - the amount of heat required to undergo a phase change
Mass
Chromatography
Latent heat
Force
41. Liter is the base unit of...
Destructive interference
Chemical reactions
Volume
Circut
42. Experiments may not be done on...
Boyles law states
Insulator
Isotopes
birds
43. (physics and chemistry) the smallest component of an element having the chemical properties of the element
Weight
Atom
Latent heat
On the periodic table which elements are grouped by color
44. 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
Radiation
Sonar technology
Venturi effect
Non - electrolytes
45. The amount of heat it takes to change a solid to a liquid
Power
Insulator
Nucleus
Latent heat
46. The energy released by a nuclear reaction - binding energy is released when the nuclei of atoms are split apart in a nuclear reaction this binding energy is called nuclear energy.
Parallel Circut
Double replacement Reactions
Nuclear energy
Transverse Waves
47. Small uncharged particles in the nucleus they are neutral
Density
Bernoulli principle
Hecto
Neutrons
48. Resistance is measured in...
chemically active
OHMS
Heat vaporization
Direct Variations
49. An electric circut with a single path
Types of potential energy?
Group 2 on the periodic table
Series circut
Semi - conductors
50. Pushing a vacuum cleaner or pulling a bowstring applies muscular force when the muscles expand & contract elastic force occurs when an object returns to its original shape (for example - when a bow is released)
Push & Pull
Types of potential energy?
Excited electrons
Current