SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
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. Reflects the light in one direction
When light hits a smooth surface
Decomposition reaction
Chromatography
Composition reaction
2. Change from gas to liquid
Condensation
Constructive interference
Power
Latent heat
3. The speed of light changes in different materials this is due to__
Refraction
Ionic Bonds
oscilloscope
At the bottom of the meniscus curve
4. The molecular weight of a substance expressed in grams - measures the amount of a substance
Mole
true of hurricanes but not of tornadoes
Pull of gravity
Applications of Archimedes principle
5. The ability of the material to oppose the flow of electrons through it all
Resistance
Radiation
Forces on objects at rest
Metalloids
6. # of protons + # of neutrons
Mass number
Electricity charged objects share these characteristics (3)
Condensation
Potential energy
7. Metric unit for measuring temperature; On this scale water freezes at zero and boils at 100.
Chemical reactions
Radioactive Particles
Non - metal
Celsius
8. It is the first element in group 13 - is a poor conductor of electricity at low temperature - however if temperature increases it will become a good conductor.
Insulin
When a light hits a rough surface
Fahrenheit
Boron
9. (of a chemical reaction or compound) occurring or formed with absorption of heat. Absorbs energy from its surroundings.
Endothermic
Heat Fusion
Non - electrolytes
Atomic mass
10. The device (bell or Build) is an example of a load. A load is a device that uses energy.
Load & switch
Calorie
Atom
Silicon
11. Electrical - Light (radiant) - Heat (thermal) - Movement
Black
Compound machines
Types of kinetic energy?
Phosphate group
12. The principle of conservation of energy: Energy can be transferred and transformed - but it cannot be created or destroyed.
Length
Applications of Archimedes principle
Heat latent
First law of thermodynamics
13. 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.
Non - electrolytes
Entropy
Nuclear Fusion
Exothermic
14. Formed when one or more electrons are transferred from one atom to another. Transfer of electrons happens when metals & non - metals bond.
The electromagnetic spectrum
Ionic Bonds
Forces on objects at rest
Hydroxyl group ( Functional group)
15. The force of attraction between two objects. Gravity exists not only on earth - but also between planets as well as in black wholes
Non - metal
Pull of gravity
Work
Dynamics
16. Heat energy that is transferred into or out of a system
Straight line motion
types of particles in the nucleus?
Thermal contact
Heat transfer
17. Uses the transfer of heat from one substance to another to determine the specific heat of the substance.
Conduction
Calorimeter
Volume
Mass number
18. A Compound breaks down into 2 or more simpler substances EX. AB -> A+B
Hydrophilic
Refraction
Decomposition reaction
Heat
19. The more energy the electrons have
The electromagnetic spectrum
At the bottom of the meniscus curve
Applications of Archimedes principle
The higher the voltage
20. Symmetry - crystalline structures are universal - Crystallographic defects - Electrical properties - crystal system
Mass
Some characteristics of crystals
Chromatography
Work
21. Submarines - diving weighting system - naval architecture - Flotation - Buoyancy compensator
Electrons
Radiation
Isotopes
Applications of Archimedes principle
22. That for a fixed amount of gas at a constant temperature - the volume of a gas increases as its pressure decreases
alloy
First law of thermodynamics
When light hits a smooth and shiny surface
Boyles law states
23. Is formed when 2 atoms share electrons - covalent bonding happens among non - metals.
Isotopes
Atomic mass
Covalent Bonds
Push & Pull
24. Number of protons
Atomic number
Condensation
same
Sonar technology
25. Is the path along which electrons flow
Hydrophilic
Atomic number
Circut
oscilloscope
26. 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
Group 2 on the periodic table
Chromatography
Nuclear energy
Deca
27. # of electrons. Non - metals have 4-8 electrons in their outermost energy.
Electrophoresis
Ampmeter
Volume
Difference between metals & non - metals
28. Harder - denser - have higher melting points & are chemically active.
Bernoulli principle
Chromatography
Alkaline earth metals are
Insulin
29. 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
Newtons 2nd law of motion
Heat latent
Exothermic
Latent heat
30. A functional group consisting of a phosphorus atom covalently bonded to four oxygen atoms. Ideal for energy transfer reactions (ATP).
Entropy
Stable electron arrangement
Phosphate group
Static friction
31. 1. Like charges repel one another - 2. Opposite charges attract each other - 3. charge is considered a neutral object has no net charge.
Electricity charged objects share these characteristics (3)
Venturi effect
During ____ elements change into other elements change into other elements called _____ elements.
Group 1 on the periodic table are all
32. Is the change from liquid to gas.
Silicon
alloy
Power
Evaporation
33. (physics) the capacity of a physical system to do work - or supply heat.
Types of kinetic energy?
Types of Friction & Resistance
Energy
Conduction
34. Not as easy to recognize as metal bc they do not always share physical properties. They are dull - brittle - & not good conductors of heat
Strong electrolytes
Non - metal
Radioactive Particles
Mole
35. Higher because it has higher apparent frequency.
Heat
As the train approaches and blasts its whistle - the whistle sounds..
Static friction
Double replacement Reactions
36. Reduction in pressure of a fluid resulting from the speed increase as fluids are forced to flow faster through narrow spaces
Atomic number
Venturi effect
Neutrons
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
37. Atoms of the same element that have different numbers of neutrons
Isotopes
Charles law
Hecto
Constructive interference
38. Causes motion
Magnetic field
Some characteristics of crystals
Contains ions
Force
39. Force of attraction that holds atoms together - when atoms are bonded chemically they give up their individual properties.
Inertia & circular motion
Chemical bond
Centrifuge
Laws of thermodynamic / Laws of conservation
40. 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
Buret
Latent heat
Difference between metals & non - metals
41. Specific gravity is the ratio based on...
Force
Simple machines
Transverse Waves
Density
42. Compounds that speed up chemical reactions. Sometimes without Catalysts reactions cant occur.
Catalysts
Non - metals
Types of Friction & Resistance
Atomic mass
43. Non - metals - group 18 - the most non - reactive elements
Pull of gravity
Noble gasses
Carbonyl Group (Functional Group)
Hydrophobic
44. Resistance is measured in...
electrostatics
OHMS
Inside the nucleus
An electromagnet can be made more powerful in 3 ways
45. 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
Conduction
Convection
Radioactive Particles
46. 1. Have some characteristics of metals & non - metals. 2. Properties do not follow patterns like metals & non - metals.
Forces on objects at rest
Chemical properties of metalliods
alloy
Grounding Charge
47. Describes the force of friction of 2 surfaces in contact with eachother . When there is relative motion between the surface.
Static friction
Kinetic Friction
Phosphate group
Archimedes principle
48. Is the study of the relationship between motion & the forces affecting motion.
Radiation
Transverse Waves
Kelvin
Dynamics
49. The mechanical energy that a body has by virtue of its position Ex. Stored energy -
Transverse Waves
potential energy
When light hits a smooth surface
Isotopes
50. It is second element in group 14 - semi - conductor. Sand is made of silicon - it is also used to manufacture glass and cement.
Non - metal
Silicon
The tilt of the Earth's axis of rotation relative to the ecliptic
First law of thermodynamics