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 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. Is a simple device used to indicate the existence of a positive or negative charge.
Carbonyl Group (Functional Group)
Applications of Archimedes principle
potential energy
electroscope
2. Is an atom that has all of its electrons in the lowest possible energy levels
Boyles law states
Stable electron arrangement
Ampmeter
Power
3. Have properties in between metals and non - metals found in groups 13-16
Non - metals
Hydrophilic
Kinetic Molecular theory
Metalloids
4. The acceleration of an object depends on the mass of the object and the amount of force applied.
Hydrocarbons
Newtons 2nd law of motion
Weak Electrolytes
Electrons
5. As the velocity of a fluid increases - the pressure exerted by the fluid decreases - The speed of a fluid - liquid - gas - increases the pressure exerts.
Excited electrons
isotopes of each other
Bernoulli principle
Types of Friction & Resistance
6. The amount of energy that it takes to raise one gram of water one degree celsius.
Calorie
Non - metal
Radioactive Particles
Corona
7. All processes cease when temperature approaches 0.
3rd law of thermodynamics
birds
Nuclear reaction
Calorimeter
8. 1. All are solids having the appearance of metals & non - metals. 2. All are white or gray - but not shiny 3. Conduct electricity - but not as well as metals.
3rd law of thermodynamics
Physical properties of Meralliods
Boyles law states
Venturi effect
9. Atoms of the same element that have different numbers of neutrons
Isotopes
Newton's 3rd law motion
Metalloids
Hydrocarbons
10. (physics and chemistry) the smallest component of an element having the chemical properties of the element
electroscope
Atom
Louis Pasteur
Constructive interference
11. A nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy
Parallel Circut
Force
Nuclear fission
Resistance
12. # of protons + # of neutrons
Catalysts
Mass
Avogadros hypothesis
Mass number
13. Lacking affinity for water. Repels water. Non - polar
Hydrophobic
The intensity of sound is measured in
OHMS law
Calorimeter
14. Negatively charged particles found outside the nucleus
Latent heat
Electrons
Length
Spectrophotometry
15. The buoyant force on an object is equal to the weight of the fluid displaced by the object
Charles law
Seismographs
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?
Archimedes principle
16. 1. Have some characteristics of metals & non - metals. 2. Properties do not follow patterns like metals & non - metals.
Newton's 3rd law motion
Neutrons
Chemical properties of metalliods
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
17. The amount of energy required for the liquid at its boiling point to become a gas
Atom
Insulator
Heat vaporization
Refraction
18. Is done on an object when an applied force moves across a distance.
Insulator
Decomposition reaction
Radiation
Work
19. 10x the base unit
Deca
Series circut
Density
Destructive interference
20. ______ of an atom is equal to the # of protons plus the # of protons plus the # of neutrons
Valence electrons
Seismographs
On the periodic table which elements are grouped by color
Atomic mass
21. What quantity of oxygen - O2 - contains very nearly the same number of molecules as 36.0 grams of water - H2O?
Catalysts
64.0 grams
Chemical properties of metalliods
As the train approaches and blasts its whistle - the whistle sounds..
22. 1. nuclear reaction 2. radioactive
Weak Electrolytes
Resistance
Hydroxyl group ( Functional group)
During ____ elements change into other elements change into other elements called _____ elements.
23. Do not have molecules with one of the two molecular arrangements required to give an odor
Resistance
alloy
Some substances have no noticeable odor because these substances
Entropy
24. A material such as glass or porcelain with negligible electrical or thermal conductivity. Electric charges do not move easily - if at all.
3rd law of thermodynamics
Insulator
Gay - Lussac's Law
Chordates
25. 1. Liquid crystals - when certain solids melt their crystal lattices disintegrate & their particles lose their 3- dimensional pattern. 2. Solid - as a liquid substance cools & forms a solid. The strong attractive forces between oppositely charges ion
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
Energy
Calorie
Length
26. Way of keeping tract of valence electrons
Black
What are the 2 most common encountered forms of energy are
Force
Lewis dot structures
27. That for a fixed amount of gas at a constant temperature - the volume of a gas increases as its pressure decreases
Rubbing
Boyles law states
Compound machines
Strong electrolytes
28. 8 electrons
Applications of Archimedes principle
Force
maximum number of electrons that an atom holds with one energy level
Atomic mass
29. A functional group consisting of a sulfur atom bonded to a hydrogen atom (
Covalent Bonds
Centrifuge
Kinetic Molecular theory
sulfhydryl group (Functional Group)
30. The monovalent group - OH in such compounds as bases and some acids and alcohols. Makes the molecule polar which increases the solubility of a compound.
Hydrocarbons
Contains ions
Hydroxyl group ( Functional group)
Buret
31. The centripetal force is provided by the high banking of the curved road & by friction between the wheels & the road.
Parallel Circut
Inertia & circular motion
Static friction
Pitch
32. A circut with two or more resistors where the electricity has more than one path to travel
Parallel Circut
Louis Pasteur
Heat transfer
Lewis dot structures
33. Rotate at very high speed in order to separate the liquids from the solids. The more dense part of the solution will sediment at the bottom of the test tube. while the lighter material will stay on top. Ex. centrifuge is used to separate blood from b
Force
Latent heat
Centrifuge
Bernoulli principle
34. A compound of which a relatively small amount of the dissolved solute exists as ions in an aqueous solution. Example: Acetic acid - CH3COOH (vinegar)
Bernoulli principle
Weak Electrolytes
Heat
Nuclear energy
35. Reduction in pressure of a fluid resulting from the speed increase as fluids are forced to flow faster through narrow spaces
isotopes of each other
Electrophoresis
Venturi effect
The intensity of sound is measured in
36. States that when 2 objects collide in an isolated system the total momentum of 2 objects after the collision. That is the momentum gained by object.
Carbonyl Group (Functional Group)
Atom
newtons first law of motion
Law of momentum conservation
37. (physics) the capacity of a physical system to do work - or supply heat.
Kilo - calorie
Endothermic
Noble gasses
Energy
38. Carbon atom - atomic number 6 - atomic mass 11
Chromatography
isotopes of each other
Atomic number
Magnetic domains
39. The process of heat transfer via solid contact
Mass
Static friction
Heat conduction
Inertia & circular motion
40. 1000x the base unit
Spectrophotometry
Kilo
Forces on objects at rest
Insulator
41. It is second element in group 14 - semi - conductor. Sand is made of silicon - it is also used to manufacture glass and cement.
Carbonyl Group (Functional Group)
Silicon
Noble gasses
Doppler effect
42. Most directly involved with controlling levels of sugar in blood
Endothermic
Insulin
true of hurricanes but not of tornadoes
Atomic mass
43. Used in electrical devices that have to function at temperatures too high for metals.
Bernoulli principle
Contains ions
When light hits a smooth surface
Semi - conductors
44. Electrons that can accept energy from outside sources and move farther away from the nucleus
Excited electrons
Hydrophilic
Linear acceleration
Convection
45. Inertia is the tendency of any object to resist change in motion. An object at rest tends to stay at rest. An object that is moving tends to keep moving.
Forces on a moving object
Kinetic Friction
Corona
Ions are
46. Symmetry - crystalline structures are universal - Crystallographic defects - Electrical properties - crystal system
Some characteristics of crystals
Condensation
Evaporation
Kelvin
47. Measure of the disorder or randomness of the particles that make of a system (measurement of movement of particles in a spontaneous reaction) EX. entropy increases as matter and energy in the universe degrade to an ultimate state of inert uniformity.
Deci
Entropy
Calorie
Hydroxyl group ( Functional group)
48. # of electrons. Non - metals have 4-8 electrons in their outermost energy.
Difference between metals & non - metals
Alkaline earth metals are
Chemical bond
true of hurricanes but not of tornadoes
49. Alkali metals
potential energy
Group 1 on the periodic table are all
Pascal
Endothermic
50. Conduction - Convection - & Radiation
Alkali metals are
Deci
Heat is transferred in 3 ways
Calorimeter