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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. Is an atom that has all of its electrons in the lowest possible energy levels
Hydrocarbons
electroscope
Stable electron arrangement
Resistance
2. A material such as glass or porcelain with negligible electrical or thermal conductivity. Electric charges do not move easily - if at all.
electroscope
Pull of gravity
Non - metals
Insulator
3. 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
Stable electron arrangement
Weight
Double replacement Reactions
4. Parts of 2 compounds replace each other. Ex. Switch partners AX + BY -> AY + BX
Nuclear fission
Buret
Convection
Double replacement Reactions
5. Atoms of the same element that have different numbers of neutrons
Isotopes
Energy
Fahrenheit
Single replacement reaction
6. The ability of the material to oppose the flow of electrons through it all
Resistance
Composition reaction
First law of thermodynamics
Isotopes
7. Formed when one or more electrons are transferred from one atom to another. Transfer of electrons happens when metals & non - metals bond.
chemically active
Newtons 2nd law of motion
Nucleus
Ionic Bonds
8. Describes the force of friction of 2 surfaces that are in contact but do not have any motion relative to eachother.
Non - electrolytes
Difference between metals & non - metals
A converging lens produces a real image when
Static friction
9. Submarines - diving weighting system - naval architecture - Flotation - Buoyancy compensator
alloy
electroscope
Doppler effect
Applications of Archimedes principle
10. 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
Insulator
Boyles law states
Exothermic
11. They are neither precise nor accurate.
Weight
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?
Neutrons
Nucleus
12. (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.
Physical properties of Meralliods
When light hits a smooth and shiny surface
Law of momentum conservation
Nuclear reaction
13. 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
Radiation
Latent heat
Thermal equilibrium
The tilt of the Earth's axis of rotation relative to the ecliptic
14. F - branch of chemistry that deals with the chemical action of electricity and the production of electricity by chemical reactions
What are the 2 most common encountered forms of energy are
Grounding Charge
Electrochemistry
Volume
15. Which of the following parts of the Sun is easily visible only during a total solar eclipse
Group 1 on the periodic table are all
Corona
Lewis dot structures
Physical properties of Meralliods
16. Liter is the base unit of...
Atomic mass
Volume
Endothermic
Nuclear fission
17. Discovered in the late 1800s that micro organisms play a casual role in onset of a disease
As the train approaches and blasts its whistle - the whistle sounds..
Gay - Lussac's Law
Doppler effect
Louis Pasteur
18. Series circut - Parallel circut
Kilo - calorie
Group 1 on the periodic table are all
Neutrons
circut types
19. Potential & Kinetic
Types of Friction & Resistance
What are the 2 most common encountered forms of energy are
Protons
Ionic Bonds
20. Animals in which of the following groups may have a backbone and a spinal cord?
Chordates
Silicon
Series circut
Density
21. 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.
Boron
Deca
When light hits a smooth surface
Kinetic Molecular theory
22. The buoyant force on an object is equal to the weight of the fluid displaced by the object
Heat is transferred in 3 ways
Archimedes principle
On the periodic table which elements are grouped by color
Magnetic field
23. A nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy
Thermal contact
Atomic mass
Nuclear Fusion
The higher the voltage
24. 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)
At the bottom of the meniscus curve
Calorimeter
Push & Pull
Power
25. 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.
Resistance
Louis Pasteur
Newton's 3rd law motion
Forces on objects at rest
26. 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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27. Alkali metals
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
Group 1 on the periodic table are all
Inside the nucleus
Chemical reactions
28. Symmetry - crystalline structures are universal - Crystallographic defects - Electrical properties - crystal system
Some characteristics of crystals
3rd law of thermodynamics
Kinetic energy
Louis Pasteur
29. The more energy the electrons have
Constructive interference
The higher the voltage
Evaporation
Inside the nucleus
30. 8 electrons
Excited electrons
Types of kinetic energy?
maximum number of electrons that an atom holds with one energy level
Dynamics
31. Experiments may not be done on...
Heat
birds
Metalloids
Kelvin
32. The principle of conservation of energy: Energy can be transferred and transformed - but it cannot be created or destroyed.
Transverse Waves
As the train approaches and blasts its whistle - the whistle sounds..
First law of thermodynamics
Inertia & circular motion
33. Gram is the base unit of...
Mole
Law of momentum conservation
Catalysts
Mass
34. A wave in which the particles move parallel to the path of the wave
Longitudinal Waves
Strong electrolytes
Pascal
Constructive interference
35. The property of sound that varies with variation in the frequency of vibration.
Specific gravity
Pitch
potential energy
When a light hits a rough surface
36. Negatively charged particles found outside the nucleus
Electrons
Destructive interference
Avogadros hypothesis
Magnetic domains
37. The molecular weight of a substance expressed in grams - measures the amount of a substance
Mole
Electrochemistry
Centrifuge
Bernoulli principle
38. Friction opposes the motion of one surface past another - Friction is common when slowing down a car or sledding down a hill.
Heat latent
Electromagnets
electrostatics
Rubbing
39. The difference in electrical charge between two points in a circuit expressed in volt. When an electron goes through a load it does work & loses some energy.
Types of Friction & Resistance
Refraction
Potential difference
Physical properties of Meralliods
40. Heat transferred by fluid current
Convection
Entropy
birds
electrostatics
41. What quantity of oxygen - O2 - contains very nearly the same number of molecules as 36.0 grams of water - H2O?
64.0 grams
Energy
conducted more easily
the mass number of an atom
42. 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
Thermal equilibrium
When a light hits a rough surface
Group 1 on the periodic table are all
43. The same pathogen must be found in every person with the same disease - the pathogen must be isolated & grown in a culture - when the organism is re - introduced in an experimental animal - that animal should develop the same disease originally seen
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44. The number of electrons per second that flow past a point in a circut.
Current
Latent heat
Mass
Forces on objects at rest
45. Concave
Eyeglasses are ____ so the image will hit the retina
Physical properties of Meralliods
Forces on a moving object
Weak Electrolytes
46. Removal of static electricity by conduction
Non - electrolytes
Grounding Charge
Two types of wave interference are (sound related)
Composition reaction
47. Compounds that speed up chemical reactions. Sometimes without Catalysts reactions cant occur.
Conduction
Destructive interference
2nd law of thermodynamics
Catalysts
48. Clustered regions of aligned magnetic atoms. When these regions are aligned with one another - the substance containing them is a magnet.
Nuclear reaction
Electrons
When light hits a smooth and shiny surface
Magnetic domains
49. Used in electrical devices that have to function at temperatures too high for metals.
Water
Inertia & circular motion
Pasteur's postulate
Semi - conductors
50. A carbon atom linked by a double bond to an oxygen atom. - c=o.
Destructive interference
types of nuclear reactions?
Bernoulli principle
Carbonyl Group (Functional Group)