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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 ability of the material to oppose the flow of electrons through it all
Chemical reactions
Atomic number
Resistance
Alkali metals are
2. Consists of frequency (f) - measured in hertz - and wavelength measured in meters - the frequency times the wavelength of every electromagnetic wave equals the speed of light.
The electromagnetic spectrum
conducted more easily
Current
Kilo - calorie
3. Electrons that can accept energy from outside sources and move farther away from the nucleus
maximum number of electrons that an atom holds with one energy level
Radiation
Semi - conductors
Excited electrons
4. Carbon atom - atomic number 6 - atomic mass 11
Inertia & circular motion
chemically active
isotopes of each other
An electromagnet can be made more powerful in 3 ways
5. 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.
Mole
Atomic mass
oscilloscope
Law of momentum conservation
6. 1/1000 the base unit
Hydroxyl group ( Functional group)
Electromagnets
Electrophoresis
Milli
7. 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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8. When you step out of the shower the floor feels colder on your feet than the bathmat. Because heat is ______________ to the floor.
conducted more easily
Inertia & circular motion
Heat Fusion
Strong electrolytes
9. The amount of energy required for the liquid at its boiling point to become a gas
Heat vaporization
Magnetic field
Radioactive Particles
Valence electrons
10. Compounds that speed up chemical reactions. Sometimes without Catalysts reactions cant occur.
Kilo
Avogadros hypothesis
Circut
Catalysts
11. 10x the base unit
Decomposition reaction
Deca
Types of Friction & Resistance
Condensation
12. 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)
Non - metals
Push & Pull
Catalysts
sulfhydryl group (Functional Group)
13. 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
Venturi effect
Types of potential energy?
Kilo - calorie
14. Elements in the middle of the periodic table - in groups 3-12.
Bernoulli principle
Transition elements
Lewis dot structures
Constructive interference
15. Lacking affinity for water. Repels water. Non - polar
Longitudinal Waves
Hydrophobic
Noble gasses
Energy
16. Two or more simple machines working together EX. wheelbarrow it uses level - wheel & axle.
Compound machines
Radiation
sulfhydryl group (Functional Group)
types of particles in the nucleus?
17. A free element replaces an element that is a part of a compound. Ex. A +BX -> AX + B
Boyles law states
Electromagnets
Chemical properties of metalliods
Single replacement reaction
18. Metal - nonmetals - & metalliods
Energy
Metalloids
Transverse Waves
On the periodic table which elements are grouped by color
19. Removal of static electricity by conduction
Metalloids
When light hits a smooth surface
Electrophoresis
Grounding Charge
20. The centripetal force is provided by the high banking of the curved road & by friction between the wheels & the road.
Phosphate group
Inertia & circular motion
Insulin
Exothermic
21. Substance that dissociates completely into its ions when added to water and conducts electricity well.
Strong electrolytes
types of nuclear reactions?
Mass
OHMS
22. The theory that all matter is composed of particles (atoms and molecules) moving constantly in random directions
Magnetic domains
Kinetic Molecular theory
Nuclear Fusion
Volume
23. Electrons in the outermost energy level; they are involved in bond formation
Compound machines
Valence electrons
Phosphate group
Forces on a moving object
24. 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
Centrifuge
Mole
Circut
Simple machines
25. Excess energy is released into the environment
Push & Pull
electrostatics
Heat
Exothermic
26. 1/10 the base unit
Linear acceleration
When a light hits a rough surface
Deci
Two types of wave interference are (sound related)
27. Most directly involved with controlling levels of sugar in blood
Longitudinal Waves
Transverse Waves
Nuclear reaction
Insulin
28. 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 kinetic energy?
Forces on a moving object
Dynamics
Isotopes
29. The acceleration of an object depends on the mass of the object and the amount of force applied.
Fahrenheit
Mass
Newtons 2nd law of motion
The electromagnetic spectrum
30. Current is measured with a device called...
Ampmeter
Corona
Volume
chemically active
31. 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.
Newtons 2nd law of motion
Mass number
Types of Friction & Resistance
Boron
32. 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 -
Heat conduction
Halogens
Some Uses of electricity
Inside the nucleus
33. A carbon atom linked by a double bond to an oxygen atom. - c=o.
Halogens
Carbonyl Group (Functional Group)
At the bottom of the meniscus curve
Transition elements
34. A functional group consisting of a sulfur atom bonded to a hydrogen atom (
sulfhydryl group (Functional Group)
Inside the nucleus
Magnetic domains
Group 1 on the periodic table are all
35. 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.
Magnetic field
Bernoulli principle
During ____ elements change into other elements change into other elements called _____ elements.
Hydrocarbons
36. 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?
OHMS law
Linear acceleration
Physical properties of Meralliods
electroscope
37. 1. Constructive 2. Destructive
Neutrons
Two types of wave interference are (sound related)
Mass number
Hydroxyl group ( Functional group)
38. Solids - gasses - and 1 liquid (Bromine)
Static friction
Non - metals
Nuclear Fusion
Calorimeter
39. Nuclear fission - Nuclear Fusion
types of nuclear reactions?
Chemical reactions
Force
Kilo - calorie
40. (of a chemical reaction or compound) occurring or formed with absorption of heat. Absorbs energy from its surroundings.
oscilloscope
potential energy
Longitudinal Waves
Endothermic
41. Objects are in thermal contact if they can affect each others temperature
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
Inertia & circular motion
Mass
Thermal contact
42. That for a fixed amount of gas at a constant temperature - the volume of a gas increases as its pressure decreases
Charles law
Physical properties of Meralliods
Boyles law states
Stable electron arrangement
43. The interference that occurs when two waves combine to make a wave with a smaller amplitude
Destructive interference
Convection
Heat conduction
Kelvin
44. The mechanical energy that a body has by virtue of its motion - energy of a moving object.
Kinetic energy
Sonar technology
Potential difference
Convection
45. Measures the amount of matter in an object
Metalloids
Atomic number
Stable electron arrangement
Mass
46. 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.
Forces on objects at rest
Fahrenheit
Nuclear Fusion
Calorie
47. Non - metals - group 18 - the most non - reactive elements
Radiation
Pascal
Noble gasses
Chemical bond
48. Ratio of the density of a substance to the density of water
Parallel Circut
Deci
Specific gravity
Pull of gravity
49. A material such as glass or porcelain with negligible electrical or thermal conductivity. Electric charges do not move easily - if at all.
conducted more easily
Calorimeter
Eyeglasses are ____ so the image will hit the retina
Insulator
50. An isotope has a different number of...
Neutrons
Nuclear reaction
Centrifuge
Exothermic