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. Gram is the base unit of...
Nuclear Fusion
As the train approaches and blasts its whistle - the whistle sounds..
Mass
Semi - conductors
2. Temporary magnets that lose their magnetism when electric current is removed
What are the 2 most common encountered forms of energy are
Calorie
Atomic number
Electromagnets
3. Experiments may not be done on...
Group 2 on the periodic table
birds
Current
Nucleus
4. 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.
Group 1 on the periodic table are all
Refraction
Hydroxyl group ( Functional group)
Heat vaporization
5. Uses the principles of capillary action to separate substances such as plant pigments molecules of a larger size will migrate up the paper more quickly produce lines of pigment. - a process used for separating mixtures by virtue of differences in abs
true of hurricanes but not of tornadoes
Carbonyl Group (Functional Group)
Chromatography
Non - electrolytes
6. The state of two or more objects or substances in thermal contact when they have reached a common temperature - EX. the affects after a hot cup of coffee meeting the desk temperature.
Thermal equilibrium
Radiation
When a light hits a rough surface
Single replacement reaction
7. # of electrons. Non - metals have 4-8 electrons in their outermost energy.
Density
Difference between metals & non - metals
Ionic Bonds
Load & switch
8. Solids - gasses - and 1 liquid (Bromine)
Non - metals
electrostatics
Spectrophotometry
birds
9. Way of keeping tract of valence electrons
Nucleus
Lewis dot structures
Series circut
When a light hits a rough surface
10. Group 17; contains nonmetals; 7 electrons in its outermost energy level; very reactive; poor conductors of electric current; never in its uncombined form in nature; combine with most metals to form salts
The presence of cells in the sample
Potential energy
Circut
Halogens
11. 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)
Non - metal
Push & Pull
Atomic number
Endothermic
12. When force is applied to an object it moves in a straight line and adding force can make it go faster or slow down.
Simple machines
Straight line motion
Two types of wave interference are (sound related)
Length
13. The property of sound that varies with variation in the frequency of vibration.
Louis Pasteur
Some substances have no noticeable odor because these substances
Pitch
Hydroxyl group ( Functional group)
14. 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.
Electrophoresis
The electromagnetic spectrum
conducted more easily
Chemical bond
15. The buoyant force on an object is equal to the weight of the fluid displaced by the object
Archimedes principle
Constructive interference
Some characteristics of crystals
Simple machines
16. They form only over warm oceans
Forces on objects at rest
Atom
true of hurricanes but not of tornadoes
When light hits a smooth surface
17. Decibels
Alkali metals are
Bernoulli principle
same
The intensity of sound is measured in
18. A circut with two or more resistors where the electricity has more than one path to travel
Some characteristics of crystals
Mole
Parallel Circut
Transverse Waves
19. The device (bell or Build) is an example of a load. A load is a device that uses energy.
Load & switch
Specific gravity
Insulator
Boron
20. A nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy
Spectrophotometry
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
Nuclear fission
Halogens
21. 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.
The higher the voltage
Law of momentum conservation
Dynamics
Chromatography
22. 2 or more substances combine to form a compound EX. A+B -> AB
Composition reaction
Decomposition reaction
Electricity charged objects share these characteristics (3)
Strong electrolytes
23. Negatively charged particles found outside the nucleus
Dynamics
Electrons
Heat vaporization
The presence of cells in the sample
24. Is the measure of energy temperature is a measure of the heat in an object.
Forces on objects at rest
Hecto
Protons
Heat
25. Is done on an object when an applied force moves across a distance.
Doppler effect
Work
Non - metal
Conduction
26. Is the study of the relationship between motion & the forces affecting motion.
Neutrons
Spectrophotometry
Isotopes
Dynamics
27. Which of the following parts of the Sun is easily visible only during a total solar eclipse
Current
Two types of wave interference are (sound related)
Stable electron arrangement
Corona
28. Is a simple device used to indicate the existence of a positive or negative charge.
Evaporation
Nuclear fission
electroscope
Push & Pull
29. Harder - denser - have higher melting points & are chemically active.
Heat is transferred in 3 ways
Non - electrolytes
Covalent Bonds
Alkaline earth metals are
30. Current is measured with a device called...
Buret
Ampmeter
types of nuclear reactions?
Lewis dot structures
31. The agent most widely and most consistently at work changing the appearance of the Earth's surface
Fahrenheit
Water
Phosphate group
Applications of Archimedes principle
32. SI unit of temperature; indicates number of units above absolute zero. To go from Celsius to Kelvin add 273. To go from Kelvin to Celsius subtract 273.
Straight line motion
Venturi effect
Energy
Kelvin
33. Consists of frequency (f) - measured in hertz - and wavelength measured in meters - the frequency times the wavelength of every electromagnetic wave equals the speed of light.
Phosphate group
The electromagnetic spectrum
Sonar technology
Series circut
34. Friction opposes the motion of one surface past another - Friction is common when slowing down a car or sledding down a hill.
Straight line motion
Chromatography
Rubbing
Some substances have no noticeable odor because these substances
35. A boulder is sitting at the edge of the cliff it has which type of energy?
Potential energy
Nucleus
Rubbing
Applications of Archimedes principle
36. A buret is used to deliver solution in precisely - measured - variable volumes. deliver one reactant until the precise end point of the reaction is reached.
Semi - conductors
Buret
the mass number of an atom
Destructive interference
37. Formed when one or more electrons are transferred from one atom to another. Transfer of electrons happens when metals & non - metals bond.
Dynamics
Calorimeter
Pitch
Ionic Bonds
38. 10x the base unit
Deca
alloy
Grounding Charge
Magnetic domains
39. A mixture containing two or more metallic elements or metallic and nonmetallic elements usually fused together or dissolving into each other when molten Ex. Brass is an alloy of zinc and copper
Alkali metals are
Exothermic
Boyles law states
alloy
40. A Compound breaks down into 2 or more simpler substances EX. AB -> A+B
Radiation
Conduction
Decomposition reaction
Parallel Circut
41. The number of electrons per second that flow past a point in a circut.
Seismographs
Deci
Current
Phosphate group
42. Conduction - Convection - & Radiation
Single replacement reaction
Ampmeter
Heat is transferred in 3 ways
potential energy
43. The ability of the material to oppose the flow of electrons through it all
Resistance
Some substances have no noticeable odor because these substances
OHMS law
Centrifuge
44. Discovered in the late 1800s that micro organisms play a casual role in onset of a disease
Ionic Bonds
Doppler effect
Louis Pasteur
Inside the nucleus
45. Non - metals - group 18 - the most non - reactive elements
Chemical properties of metalliods
Milli
Noble gasses
Neutrons
46. Compounds that speed up chemical reactions. Sometimes without Catalysts reactions cant occur.
Pasteur's postulate
The tilt of the Earth's axis of rotation relative to the ecliptic
2nd law of thermodynamics
Catalysts
47. (physics) the capacity of a physical system to do work - or supply heat.
Heat latent
Energy
Kinetic Molecular theory
the mass number of an atom
48. Clustered regions of aligned magnetic atoms. When these regions are aligned with one another - the substance containing them is a magnet.
Ampmeter
When light hits a smooth and shiny surface
Magnetic domains
Seismographs
49. Electronic equipment that provides visual images of varying electrical quantities - Useful in studying waves b/c it gives a picture of the wave.
oscilloscope
Alkali metals are
Load & switch
What are the 2 most common encountered forms of energy are
50. 1. nuclear reaction 2. radioactive
Nuclear energy
Hydroxyl group ( Functional group)
During ____ elements change into other elements change into other elements called _____ elements.
Seismographs