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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. Potential & Kinetic
What are the 2 most common encountered forms of energy are
Density
Bernoulli principle
Current
2. Describes the force of friction of 2 surfaces in contact with eachother . When there is relative motion between the surface.
Single replacement reaction
Kinetic Friction
Constructive interference
Potential difference
3. Animals in which of the following groups may have a backbone and a spinal cord?
The tilt of the Earth's axis of rotation relative to the ecliptic
Mass
Types of kinetic energy?
Chordates
4. Is the transfer of energy by waves such as the electromagnetic waves emitted by stars the sun warms the earth by emitting radiant energy.
Buret
Milli
Radiation
Constructive interference
5. Excess energy is released into the environment
Exothermic
Heat Fusion
Group 1 on the periodic table are all
Newton's 3rd law motion
6. Heat transferred by direct contact
Conduction
Kinetic Molecular theory
Chemical bond
Dynamics
7. Are used in the treatment of cancer b/c they can kill cancer cells. However - if powerful enough they can kill healthy cells.
Radioactive Particles
Group 1 on the periodic table are all
Density
types of nuclear reactions?
8. Change the chemical composition of a material - Computers can be made small enough to fit inside a plastic credit card - resistors are used to regulate volume on television or radio -
Non - metal
Some Uses of electricity
Transverse Waves
Nuclear reaction
9. Electrons in the outermost energy level; they are involved in bond formation
Chordates
When light hits a smooth surface
Heat is transferred in 3 ways
Valence electrons
10. 1. Constructive 2. Destructive
Two types of wave interference are (sound related)
Law of momentum conservation
Composition reaction
Electromagnets
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)
Push & Pull
Avogadros hypothesis
Kilo
true of hurricanes but not of tornadoes
12. Gram is the base unit of...
Physical properties of Meralliods
Mass
Milli
Entropy
13. That for a fixed amount of gas at a constant temperature - the volume of a gas increases as its pressure decreases
OHMS law
Electrochemistry
Boyles law states
Hecto
14. The more energy the electrons have
Conduction
The higher the voltage
Heat conduction
Static friction
15. 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.
Nuclear Fusion
Simple machines
Forces on a moving object
Fahrenheit
16. Removal of static electricity by conduction
Milli
Grounding Charge
conducted more easily
Compound machines
17. The amount of energy required for the liquid at its boiling point to become a gas
Electricity charged objects share these characteristics (3)
Heat vaporization
the mass number of an atom
Phases of matter
18. 8 electrons
Force
OHMS
maximum number of electrons that an atom holds with one energy level
Electrochemistry
19. Average mass of various isotopes of the element.
Atomic mass
Mass
Density
Ions are
20. 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.
Buret
Magnetic domains
Energy
OHMS
21. 1/10 the base unit
Stable electron arrangement
oscilloscope
Magnetic domains
Deci
22. Conduction - Convection - & Radiation
First law of thermodynamics
Heat is transferred in 3 ways
An electromagnet can be made more powerful in 3 ways
The intensity of sound is measured in
23. The object is further than one focal length from the lens
Isotopes
Nuclear energy
Water
A converging lens produces a real image when
24. 10x the base unit
the mass number of an atom
Forces on a moving object
Ions are
Deca
25. The process of heat transfer via solid contact
Heat conduction
Isotopes
Convection
Applications of Archimedes principle
26. Measure of the earth's pull
Weight
Corona
Some Uses of electricity
Charles law
27. 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
maximum number of electrons that an atom holds with one energy level
Exothermic
Centrifuge
Straight line motion
28. An object's _____ gives it resistance to change its current state of motion it is also the measure of an objects resistance to acceleration.
Convection
Kilo
Linear acceleration
Mass
29. Record vibrations in earth & allow us to measure earthquake activity.
Density
Seismographs
Archimedes principle
Some Uses of electricity
30. The number of electrons per second that flow past a point in a circut.
Current
Chordates
Double replacement Reactions
Mass
31. Temporary magnets that lose their magnetism when electric current is removed
Electromagnets
Atomic number
Energy
Heat
32. Uses percent light absorbance to measure a color change - thus giving qualitative data using quantitative value - measures light intensity as a function of color - or more specifically - the wavelength of light.
Spectrophotometry
Insulin
Stable electron arrangement
Pull of gravity
33. The transfer of heat by electromagnetic waves is called?
Radiation
Seismographs
Non - metals
Atomic number
34. An electric circut with a single path
Longitudinal Waves
Series circut
Halogens
alloy
35. Transfer of thermal energy with in a fluid. The particles in a fluid transfer the thermal energy from hot areas to cooler areas EX. the warmed up rising air from a heat source such as a fire or electric heater.
Hecto
Nuclear Fusion
Laws of thermodynamic / Laws of conservation
Convection
36. (of a chemical reaction or compound) occurring or formed with absorption of heat. Absorbs energy from its surroundings.
Mole
The electromagnetic spectrum
Atom
Endothermic
37. Relates pressure & temp. and temp and volume.
Direct Variations
Potential difference
Corona
Mass
38. When force is applied to an object it moves in a straight line and adding force can make it go faster or slow down.
Exothermic
Heat Fusion
Electricity charged objects share these characteristics (3)
Straight line motion
39. The device (bell or Build) is an example of a load. A load is a device that uses energy.
Insulator
Deci
When light hits a smooth surface
Load & switch
40. Solutes that have bonds; no electrically charged species are created when they dissolve in water; glucose; lipids; urea
Inside the nucleus
Nuclear energy
Non - electrolytes
Destructive interference
41. When measuring the volume of water in a graduated cylinder where does one read the measurement?
A converging lens produces a real image when
Types of kinetic energy?
At the bottom of the meniscus curve
Current
42. 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.
Law of momentum conservation
Current
Circut
When a light hits a rough surface
43. The speed of light changes in different materials this is due to__
Refraction
Electrochemistry
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
OHMS
44. Is the work done divided by the amount of the time it took to do it. P= w/t
Power
The electromagnetic spectrum
Avogadros hypothesis
Insulator
45. A nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy
Heat transfer
Nuclear Fusion
Forces on a moving object
Static friction
46. Number of protons
Alkali metals are
Doppler effect
Atomic number
Chordates
47. 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
Thermal equilibrium
Density
Newtons 2nd law of motion
Latent heat
48. Electronic equipment that provides visual images of varying electrical quantities - Useful in studying waves b/c it gives a picture of the wave.
Milli
Deci
oscilloscope
Phases of matter
49. The force of attraction between two objects. Gravity exists not only on earth - but also between planets as well as in black wholes
Potential difference
Inertia & circular motion
Electrons
Pull of gravity
50. 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
Direct Variations
When a light hits a rough surface
Grounding Charge