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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. When measuring the volume of water in a graduated cylinder where does one read the measurement?
Transition elements
At the bottom of the meniscus curve
Linear acceleration
Endothermic
2. (physics) a process that alters the energy or structure or composition of atomic nuclei - When a reaction involves the nucleus - elements become different thus is called a nuclear reaction.
Sonar technology
Nuclear reaction
Nuclear fission
The electromagnetic spectrum
3. Removal of static electricity by conduction
Heat transfer
Radioactive Particles
Grounding Charge
electrostatics
4. When force is applied to an object it moves in a straight line and adding force can make it go faster or slow down.
Straight line motion
Semi - conductors
3rd law of thermodynamics
Resistance
5. Metal - nonmetals - & metalliods
On the periodic table which elements are grouped by color
Latent heat
Pasteur's postulate
Boron
6. Discovered in the late 1800s that micro organisms play a casual role in onset of a disease
Insulin
Thermal contact
Types of Friction & Resistance
Louis Pasteur
7. Negatively charged particles found outside the nucleus
Some characteristics of crystals
Electrons
the mass number of an atom
Grounding Charge
8. The centripetal force is provided by the high banking of the curved road & by friction between the wheels & the road.
circut types
Inertia & circular motion
Static friction
Chordates
9. Reduction in pressure of a fluid resulting from the speed increase as fluids are forced to flow faster through narrow spaces
Venturi effect
Thermal contact
Isotopes
Radioactive Particles
10. The amount of energy that it takes to raise one gram of water one degree celsius.
Stable electron arrangement
Calorie
Bernoulli principle
Kinetic energy
11. Excess energy is released into the environment
Electrons
Latent heat
Exothermic
Pitch
12. Friction opposes the motion of one surface past another - Friction is common when slowing down a car or sledding down a hill.
Rubbing
potential energy
Conduction
When light hits a smooth and shiny surface
13. Several vehicles - initially at a complete stop - begin a long race at the same starting point. The vehicle that has a constant value for which of the following is most likely to win?
An electromagnet can be made more powerful in 3 ways
Linear acceleration
Mole
Boron
14. F - branch of chemistry that deals with the chemical action of electricity and the production of electricity by chemical reactions
oscilloscope
Push & Pull
Electrochemistry
Convection
15. Is the measure of energy temperature is a measure of the heat in an object.
Centrifuge
electrostatics
Pull of gravity
Heat
16. 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.
When a light hits a rough surface
Nuclear energy
sulfhydryl group (Functional Group)
Louis Pasteur
17. Electronic equipment that provides visual images of varying electrical quantities - Useful in studying waves b/c it gives a picture of the wave.
Atom
Atomic number
oscilloscope
Dynamics
18. Atoms with an equal # of protons and electrons.
Ions are
Electromagnets
electroscope
Mass
19. Are used in the treatment of cancer b/c they can kill cancer cells. However - if powerful enough they can kill healthy cells.
Ampmeter
Heat Fusion
Linear acceleration
Radioactive Particles
20. Specific gravity is the ratio based on...
Deca
Density
Heat
Heat vaporization
21. The Earth's seasons can be attributed primarily to which of the following in conjunction with its revolution about the Sun?
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22. Heat transferred by direct contact
Non - metal
Hydrocarbons
Hydrophilic
Conduction
23. The theory that all matter is composed of particles (atoms and molecules) moving constantly in random directions
Kinetic Molecular theory
electrostatics
Boyles law states
Electrophoresis
24. A wave in which the particles move parallel to the path of the wave
Valence electrons
Longitudinal Waves
Stable electron arrangement
Group 2 on the periodic table
25. Concave
Non - metal
Eyeglasses are ____ so the image will hit the retina
Types of potential energy?
Halogens
26. Animals in which of the following groups may have a backbone and a spinal cord?
Laws of thermodynamic / Laws of conservation
Chordates
At the bottom of the meniscus curve
As the train approaches and blasts its whistle - the whistle sounds..
27. 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)
Electricity charged objects share these characteristics (3)
Push & Pull
conducted more easily
Longitudinal Waves
28. The region around a magnet where the magnetic force is exerted
The electromagnetic spectrum
Magnetic field
Load & switch
Covalent Bonds
29. What quantity of oxygen - O2 - contains very nearly the same number of molecules as 36.0 grams of water - H2O?
Radiation
64.0 grams
Nuclear Fusion
Protons
30. Is the transfer of heat with no actual transfer of matter. Ex. Iron pan of flame.
Convection
Conduction
Carbon Dioxide
Chemical properties of metalliods
31. Solid has a definite shape and volume - Liquid has definite volume - but no shape - Gas has no shape of volume.
The intensity of sound is measured in
Latent heat
Law of momentum conservation
Phases of matter
32. Formed when one or more electrons are transferred from one atom to another. Transfer of electrons happens when metals & non - metals bond.
Ionic Bonds
Some characteristics of crystals
maximum number of electrons that an atom holds with one energy level
Boyles law states
33. Harder - denser - have higher melting points & are chemically active.
Alkaline earth metals are
Condensation
Kilo
types of particles in the nucleus?
34. A piece of paper that appears blue in sunlight is illuminated solely by a red light that is passed through a green filter. What color does the paper appear under this illumination?
Ionic Bonds
Black
Valence electrons
Types of potential energy?
35. The formula F=M/A is a shorthand force equals mass over acceleration. An object will not move unless the force is strong enough to move the mass.
OHMS
Work
Electromagnets
Forces on objects at rest
36. Is the change from liquid to gas.
Evaporation
Nucleus
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?
Chemical bond
37. 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.
Longitudinal Waves
OHMS law
Bernoulli principle
Deca
38. Alkali Metals are the most _____________
A converging lens produces a real image when
true of hurricanes but not of tornadoes
Atomic mass
chemically active
39. Describes the force of friction of 2 surfaces in contact with eachother . When there is relative motion between the surface.
Semi - conductors
Kinetic Friction
Eyeglasses are ____ so the image will hit the retina
Valence electrons
40. They are neither precise nor accurate.
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?
2nd law of thermodynamics
Neutrons
Heat vaporization
41. Causes motion
Heat transfer
potential energy
Force
During ____ elements change into other elements change into other elements called _____ elements.
42. Are small positively charged particles
Protons
Single replacement reaction
Sonar technology
Magnetic domains
43. A principle that states that for every action there is an equal reaction in the opposite direction
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44. The mechanical energy that a body has by virtue of its position Ex. Stored energy -
Exothermic
potential energy
Constructive interference
Conduction
45. Is the transfer of energy by waves such as the electromagnetic waves emitted by stars the sun warms the earth by emitting radiant energy.
Nuclear reaction
conducted more easily
Radiation
Force
46. 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.
Hydrophilic
Law of momentum conservation
Static friction
Rubbing
47. Change in the apparent frequency of a wave as observer and source move toward or away from each other
Heat Fusion
Electromagnets
Transition elements
Doppler effect
48. Equal volumes of gases at the same temperature and pressure contain equal numbers of particles
Pull of gravity
Valence electrons
Avogadros hypothesis
Heat transfer
49. Measures the amount of matter in an object
Celsius
Mass
Pasteur's postulate
Grounding Charge
50. The property of sound that varies with variation in the frequency of vibration.
Inside the nucleus
Pitch
Buret
Types of Friction & Resistance