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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. The relationship between voltage - current - and resistance - V=IR
OHMS law
Destructive interference
Alkali metals are
Heat latent
2. Solids - gasses - and 1 liquid (Bromine)
Heat Fusion
Deci
Group 1 on the periodic table are all
Non - metals
3. Elements in the middle of the periodic table - in groups 3-12.
Stable electron arrangement
At the bottom of the meniscus curve
Two types of wave interference are (sound related)
Transition elements
4. 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
Thermal equilibrium
Mole
Evaporation
5. 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.
Thermal contact
Potential difference
Spectrophotometry
Calorie
6. 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?
same
Atomic mass
Linear acceleration
Mass number
7. 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
Types of potential energy?
Carbon Dioxide
As the train approaches and blasts its whistle - the whistle sounds..
Conduction
8. Negatively charged particles found outside the nucleus
isotopes of each other
Noble gasses
Weight
Electrons
9. Experiments may not be done on...
Non - metal
birds
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?
When light hits a smooth and shiny surface
10. A functional group consisting of a phosphorus atom covalently bonded to four oxygen atoms. Ideal for energy transfer reactions (ATP).
Excited electrons
Phosphate group
Silicon
Boron
11. 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.
Hydroxyl group ( Functional group)
Length
Avogadros hypothesis
Thermal equilibrium
12. A circut with two or more resistors where the electricity has more than one path to travel
Parallel Circut
Semi - conductors
Constructive interference
Heat conduction
13. Is formed when 2 atoms share electrons - covalent bonding happens among non - metals.
Covalent Bonds
Excited electrons
The intensity of sound is measured in
Length
14. Measure of the earth's pull
Kinetic energy
Weight
OHMS
Neutrons
15. Carbon atom - atomic number 6 - atomic mass 11
the mass number of an atom
When light hits a smooth surface
isotopes of each other
Newton's 3rd law motion
16. 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.
Kelvin
When a light hits a rough surface
Neutrons
Condensation
17. Reduction in pressure of a fluid resulting from the speed increase as fluids are forced to flow faster through narrow spaces
Venturi effect
Phosphate group
Kilo
Specific gravity
18. The amount of heat it takes to change a solid to a liquid
Evaporation
Forces on objects at rest
Latent heat
Chemical properties of metalliods
19. Ratio of the density of a substance to the density of water
isotopes of each other
Specific gravity
Calorie
Archimedes principle
20. Lacking affinity for water. Repels water. Non - polar
Heat vaporization
Hydrophobic
Weak Electrolytes
Semi - conductors
21. Removal of static electricity by conduction
Mass
Isotopes
Laws of thermodynamic / Laws of conservation
Grounding Charge
22. An electric circut with a single path
Hecto
Series circut
Non - metals
Atom
23. (of a chemical reaction or compound) occurring or formed with absorption of heat. Absorbs energy from its surroundings.
Halogens
Inertia & circular motion
Condensation
Endothermic
24. Parts of 2 compounds replace each other. Ex. Switch partners AX + BY -> AY + BX
Weight
Double replacement Reactions
Thermal contact
Hydrophobic
25. 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.
Types of potential energy?
Hydrocarbons
Forces on a moving object
birds
26. The mechanical energy that a body has by virtue of its motion - energy of a moving object.
electroscope
Kinetic energy
same
Ions are
27. Objects are in thermal contact if they can affect each others temperature
Strong electrolytes
Destructive interference
Thermal contact
Milli
28. Series circut - Parallel circut
Phases of matter
Latent heat
circut types
Non - metal
29. Mass of the substance contained per unit of volume
Venturi effect
Calorie
Density
Nuclear fission
30. A nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy
Pull of gravity
Venturi effect
Power
Nuclear fission
31. 'An object at rest will remain at rest - and an object moving at a constant velocity will continue moving at a constant velocity - unless it is acted upon by an unbalanced force.' Another name is Law of Inertia
Hecto
newtons first law of motion
Exothermic
Types of potential energy?
32. That for a fixed amount of gas at a constant temperature - the volume of a gas increases as its pressure decreases
Celsius
Boyles law states
Neutrons
Sonar technology
33. A free element replaces an element that is a part of a compound. Ex. A +BX -> AX + B
Single replacement reaction
Volume
Endothermic
Difference between metals & non - metals
34. When force is applied to an object it moves in a straight line and adding force can make it go faster or slow down.
Linear acceleration
maximum number of electrons that an atom holds with one energy level
Straight line motion
Buret
35. What quantity of oxygen - O2 - contains very nearly the same number of molecules as 36.0 grams of water - H2O?
Types of Friction & Resistance
Electromagnets
64.0 grams
Phases of matter
36. 1. Like charges repel one another - 2. Opposite charges attract each other - 3. charge is considered a neutral object has no net charge.
Chemical reactions
types of particles in the nucleus?
Electricity charged objects share these characteristics (3)
Stable electron arrangement
37. F - branch of chemistry that deals with the chemical action of electricity and the production of electricity by chemical reactions
Laws of thermodynamic / Laws of conservation
Physical properties of Meralliods
Electrochemistry
Chemical properties of metalliods
38. The amount of energy that it takes to raise one gram of water one degree celsius.
Calorie
conducted more easily
Ions are
Types of kinetic energy?
39. It is second element in group 14 - semi - conductor. Sand is made of silicon - it is also used to manufacture glass and cement.
Fahrenheit
Silicon
Resistance
Sonar technology
40. Electrons that can accept energy from outside sources and move farther away from the nucleus
Sonar technology
Newtons 2nd law of motion
Chemical bond
Excited electrons
41. Is the change from liquid to gas.
Evaporation
Alkali metals are
Excited electrons
Single replacement reaction
42. The device (bell or Build) is an example of a load. A load is a device that uses energy.
Load & switch
Specific gravity
Group 2 on the periodic table
Buret
43. (physics) the capacity of a physical system to do work - or supply heat.
Dynamics
electrostatics
Nuclear fission
Energy
44. Excess energy is released into the environment
Heat is transferred in 3 ways
Exothermic
Linear acceleration
Milli
45. Have properties in between metals and non - metals found in groups 13-16
types of nuclear reactions?
When light hits a smooth and shiny surface
Metalloids
Thermal equilibrium
46. Measures the amount of matter in an object
Straight line motion
Types of kinetic energy?
Physical properties of Meralliods
Mass
47. The centripetal force is provided by the high banking of the curved road & by friction between the wheels & the road.
Circut
Heat transfer
Inertia & circular motion
On the periodic table which elements are grouped by color
48. Change in the apparent frequency of a wave as observer and source move toward or away from each other
Centrifuge
Density
Doppler effect
Destructive interference
49. Is a simple device used to indicate the existence of a positive or negative charge.
Some substances have no noticeable odor because these substances
Transition elements
Doppler effect
electroscope
50. Heat transferred by direct contact
Forces on objects at rest
Conduction
Longitudinal Waves
Calorimeter