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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. Resistance is measured in...
OHMS
Mass number
Electrochemistry
As the train approaches and blasts its whistle - the whistle sounds..
2. Is the transfer of energy by waves such as the electromagnetic waves emitted by stars the sun warms the earth by emitting radiant energy.
Carbon Dioxide
Eyeglasses are ____ so the image will hit the retina
Radiation
Endothermic
3. A wave in which the particles of the medium move perpendicularly to the direction the wave is traveling
OHMS
Transverse Waves
Bernoulli principle
Nuclear energy
4. The interference that occurs when two waves combine to make a wave with a smaller amplitude
Series circut
isotopes of each other
Destructive interference
Work
5. The branch of physics that deals with static electricity - study of stationary electric charges.
electrostatics
Radiation
Phosphate group
Load & switch
6. An electric circut with a single path
Series circut
Kinetic Friction
Halogens
Sonar technology
7. The interference that occurs when two waves combine to make a wave with a larger amplitude
birds
OHMS law
Calorie
Constructive interference
8. Polar molecules
64.0 grams
Sonar technology
Simple machines
Hydrophilic
9. What quantity of oxygen - O2 - contains very nearly the same number of molecules as 36.0 grams of water - H2O?
Alkaline earth metals are
Conduction
Latent heat
64.0 grams
10. A unit of heat equal to the amount of heat required to raise the temperature of one kilogram of water by one degree at one atmosphere pressure. used by nutritionists to characterize the energy - producing potential in food
Kilo - calorie
Straight line motion
Radioactive Particles
Transverse Waves
11. 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.
Types of kinetic energy?
Law of momentum conservation
Pitch
Non - electrolytes
12. Are used in the treatment of cancer b/c they can kill cancer cells. However - if powerful enough they can kill healthy cells.
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
Calorie
Thermal contact
Radioactive Particles
13. A principle that states that for every action there is an equal reaction in the opposite direction
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14. (of a chemical reaction or compound) occurring or formed with absorption of heat. Absorbs energy from its surroundings.
birds
Deci
Endothermic
isotopes of each other
15. 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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16. According to some scientists - the Earth's average surface temperature is rising as a result of the greenhouse effect. An increase in the atmospheric concentration of which of the following gases is considered to be primarily responsible
Fahrenheit
Current
Carbon Dioxide
Spectrophotometry
17. 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?
Series circut
Laws of thermodynamic / Laws of conservation
Non - metals
Linear acceleration
18. 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.
Mole
Noble gasses
Mass
Kelvin
19. 8 electrons
Alkali metals are
maximum number of electrons that an atom holds with one energy level
Forces on a moving object
Eyeglasses are ____ so the image will hit the retina
20. Is done on an object when an applied force moves across a distance.
Work
Gay - Lussac's Law
Weak Electrolytes
Thermal contact
21. A carbon atom linked by a double bond to an oxygen atom. - c=o.
maximum number of electrons that an atom holds with one energy level
Power
Insulator
Carbonyl Group (Functional Group)
22. Substance that dissociates completely into its ions when added to water and conducts electricity well.
Heat transfer
Hydroxyl group ( Functional group)
Length
Strong electrolytes
23. Atoms of the same element that have different numbers of neutrons
Calorimeter
Radioactive Particles
Nuclear reaction
Isotopes
24. Excess energy is released into the environment
Exothermic
Inside the nucleus
Latent heat
At the bottom of the meniscus curve
25. It is second element in group 14 - semi - conductor. Sand is made of silicon - it is also used to manufacture glass and cement.
Silicon
Noble gasses
Black
Chemical bond
26. 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.
true of hurricanes but not of tornadoes
Circut
Laws of thermodynamic / Laws of conservation
Boron
27. Uses sound waves to locate objects and is especially useful underwater the sound waves bounce off the object and are used to assist in location
Gay - Lussac's Law
Sonar technology
Louis Pasteur
Contains ions
28. (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.
The tilt of the Earth's axis of rotation relative to the ecliptic
Nuclear reaction
Atom
Neutrons
29. Shiny - softer & less dense. Mostly chemically active
Electrons
Alkali metals are
isotopes of each other
Push & Pull
30. The more energy the electrons have
Rubbing
Metalloids
The higher the voltage
Grounding Charge
31. Static friction - Kinetic friction - Push & pull - rubbing - pull of gravity - forces on objects at rest - forces on a moving object - inertia & circular motion.
Types of Friction & Resistance
Energy
Pasteur's postulate
Neutrons
32. 1. Like charges repel one another - 2. Opposite charges attract each other - 3. charge is considered a neutral object has no net charge.
Hecto
Two types of wave interference are (sound related)
Electricity charged objects share these characteristics (3)
Pasteur's postulate
33. 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
Single replacement reaction
Transition elements
Milli
34. Animals in which of the following groups may have a backbone and a spinal cord?
An electromagnet can be made more powerful in 3 ways
Chordates
Conduction
Hecto
35. A Compound breaks down into 2 or more simpler substances EX. AB -> A+B
Ions are
Newtons 2nd law of motion
Decomposition reaction
Thermal contact
36. The mechanical energy that a body has by virtue of its motion - energy of a moving object.
Kinetic energy
Inside the nucleus
3rd law of thermodynamics
Composition reaction
37. 100x the base unit
Group 1 on the periodic table are all
Hecto
Louis Pasteur
Heat conduction
38. 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.
Heat Fusion
Deca
Hydroxyl group ( Functional group)
Black
39. The force of attraction between two objects. Gravity exists not only on earth - but also between planets as well as in black wholes
Pull of gravity
Excited electrons
Nuclear reaction
Venturi effect
40. Change from gas to liquid
Celsius
Condensation
When a light hits a rough surface
Mass number
41. Record vibrations in earth & allow us to measure earthquake activity.
Calorie
Seismographs
At the bottom of the meniscus curve
chemically active
42. # of electrons. Non - metals have 4-8 electrons in their outermost energy.
Difference between metals & non - metals
Forces on objects at rest
Newtons 2nd law of motion
Atom
43. Carbon atom - atomic number 6 - atomic mass 11
isotopes of each other
Gay - Lussac's Law
Laws of thermodynamic / Laws of conservation
circut types
44. Submarines - diving weighting system - naval architecture - Flotation - Buoyancy compensator
Radioactive Particles
Applications of Archimedes principle
true of hurricanes but not of tornadoes
Some Uses of electricity
45. The centripetal force is provided by the high banking of the curved road & by friction between the wheels & the road.
Conduction
On the periodic table which elements are grouped by color
Force
Inertia & circular motion
46. Reduction in pressure of a fluid resulting from the speed increase as fluids are forced to flow faster through narrow spaces
Venturi effect
Eyeglasses are ____ so the image will hit the retina
Atom
When a light hits a rough surface
47. Measures the amount of matter in an object
Calorie
The higher the voltage
Mass
Kilo - calorie
48. Heat energy that is transferred into or out of a system
Condensation
Electromagnets
Types of Friction & Resistance
Heat transfer
49. The number of electrons per second that flow past a point in a circut.
Dynamics
Volume
Current
true of hurricanes but not of tornadoes
50. The theory that all matter is composed of particles (atoms and molecules) moving constantly in random directions
Milli
Kinetic Molecular theory
What are the 2 most common encountered forms of energy are
Isotopes