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Test your basic knowledge |
Praxis General Science
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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. Conduction - Convection - & Radiation
Ionic Bonds
Non - electrolytes
Heat is transferred in 3 ways
Louis Pasteur
2. 1. nuclear reaction 2. radioactive
Convection
Nucleus
Mass
During ____ elements change into other elements change into other elements called _____ elements.
3. Number of protons
The presence of cells in the sample
Atomic number
Current
Covalent Bonds
4. The object is further than one focal length from the lens
A converging lens produces a real image when
same
Chemical properties of metalliods
Mass
5. 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.
Ions are
Kelvin
Work
Forces on objects at rest
6. Stored mechanical - Nuclear - Chemical - gravitational
Circut
Insulin
Types of potential energy?
chemically active
7. It scatters light in many directions
Doppler effect
Halogens
Atomic mass
When a light hits a rough surface
8. Alkaline earth metals
types of particles in the nucleus?
As the train approaches and blasts its whistle - the whistle sounds..
Group 2 on the periodic table
Spectrophotometry
9. Average mass of various isotopes of the element.
OHMS
Insulator
Atomic mass
Group 2 on the periodic table
10. Gram is the base unit of...
Catalysts
Mass
Semi - conductors
Kinetic energy
11. Heat transferred by direct contact
Metalloids
Conduction
64.0 grams
Parallel Circut
12. The principle of conservation of energy: Energy can be transferred and transformed - but it cannot be created or destroyed.
Lewis dot structures
Nuclear energy
First law of thermodynamics
Length
13. 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.
Composition reaction
isotopes of each other
Forces on a moving object
Inside the nucleus
14. 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?
Atom
When a light hits a rough surface
Group 1 on the periodic table are all
Linear acceleration
15. They form only over warm oceans
electrostatics
Types of kinetic energy?
same
true of hurricanes but not of tornadoes
16. Is a simple device used to indicate the existence of a positive or negative charge.
electroscope
Contains ions
Types of potential energy?
Neutrons
17. Used in electrical devices that have to function at temperatures too high for metals.
Semi - conductors
Double replacement Reactions
Stable electron arrangement
Rubbing
18. Small uncharged particles in the nucleus they are neutral
Kinetic Friction
Neutrons
Carbonyl Group (Functional Group)
Density
19. Submarines - diving weighting system - naval architecture - Flotation - Buoyancy compensator
Hydroxyl group ( Functional group)
Applications of Archimedes principle
Non - metal
Non - metals
20. 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
When light hits a smooth surface
types of particles in the nucleus?
Neutrons
21. When you step out of the shower the floor feels colder on your feet than the bathmat. Because heat is ______________ to the floor.
chemically active
When a light hits a rough surface
Double replacement Reactions
conducted more easily
22. Force of attraction that holds atoms together - when atoms are bonded chemically they give up their individual properties.
Chemical bond
Alkali metals are
Inside the nucleus
potential energy
23. 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.
Density
Seismographs
The electromagnetic spectrum
Insulin
24. Decibels
The intensity of sound is measured in
same
Parallel Circut
Excited electrons
25. Static friction - Kinetic friction - Push & pull - rubbing - pull of gravity - forces on objects at rest - forces on a moving object - inertia & circular motion.
A converging lens produces a real image when
Isotopes
Types of Friction & Resistance
Mass number
26. Elements in the middle of the periodic table - in groups 3-12.
Group 2 on the periodic table
Exothermic
Eyeglasses are ____ so the image will hit the retina
Transition elements
27. The agent most widely and most consistently at work changing the appearance of the Earth's surface
Water
Alkali metals are
same
Latent heat
28. Meter is the base unit of...
Two types of wave interference are (sound related)
Hecto
Length
Kinetic Friction
29. Symmetry - crystalline structures are universal - Crystallographic defects - Electrical properties - crystal system
Magnetic field
Volume
Refraction
Some characteristics of crystals
30. A functional group consisting of a sulfur atom bonded to a hydrogen atom (
Stable electron arrangement
Series circut
sulfhydryl group (Functional Group)
same
31. A temperature scale with the freezing point of water 32 degrees and the boiling point of 212 degrees.
Semi - conductors
Fahrenheit
Load & switch
Mass
32. 10x the base unit
Circut
Evaporation
Deca
Pasteur's postulate
33. What quantity of oxygen - O2 - contains very nearly the same number of molecules as 36.0 grams of water - H2O?
64.0 grams
Mole
Buret
On the periodic table which elements are grouped by color
34. A wave in which the particles of the medium move perpendicularly to the direction the wave is traveling
Chemical bond
Laws of thermodynamic / Laws of conservation
Chemical reactions
Transverse Waves
35. Solid has a definite shape and volume - Liquid has definite volume - but no shape - Gas has no shape of volume.
Pitch
Calorie
Phases of matter
Constructive interference
36. The relationship between voltage - current - and resistance - V=IR
Two types of wave interference are (sound related)
The intensity of sound is measured in
The electromagnetic spectrum
OHMS law
37. Parts of 2 compounds replace each other. Ex. Switch partners AX + BY -> AY + BX
Double replacement Reactions
Phosphate group
Spectrophotometry
Types of potential energy?
38. The mechanical energy that a body has by virtue of its motion - energy of a moving object.
Atomic mass
Kinetic energy
Potential energy
Archimedes principle
39. Way of keeping tract of valence electrons
Lewis dot structures
Composition reaction
The electromagnetic spectrum
sulfhydryl group (Functional Group)
40. Is done on an object when an applied force moves across a distance.
Work
Neutrons
3rd law of thermodynamics
Heat latent
41. Change in the apparent frequency of a wave as observer and source move toward or away from each other
Latent heat
Atomic mass
Doppler effect
Potential energy
42. An object's _____ gives it resistance to change its current state of motion it is also the measure of an objects resistance to acceleration.
Entropy
Mass
Noble gasses
Non - electrolytes
43. Mass & weight are not the ____ quality
Exothermic
Conduction
Weight
same
44. The centripetal force is provided by the high banking of the curved road & by friction between the wheels & the road.
Inertia & circular motion
The tilt of the Earth's axis of rotation relative to the ecliptic
Difference between metals & non - metals
Semi - conductors
45. The state of two or more objects or substances in thermal contact when they have reached a common temperature - EX. the affects after a hot cup of coffee meeting the desk temperature.
Insulator
Thermal equilibrium
Seismographs
Valence electrons
46. A wave in which the particles move parallel to the path of the wave
Corona
Excited electrons
Longitudinal Waves
Spectrophotometry
47. Formed when one or more electrons are transferred from one atom to another. Transfer of electrons happens when metals & non - metals bond.
Corona
Potential energy
Sonar technology
Ionic Bonds
48. Is the change from liquid to gas.
maximum number of electrons that an atom holds with one energy level
Evaporation
As the train approaches and blasts its whistle - the whistle sounds..
Chemical reactions
49. Is the transfer of energy by waves such as the electromagnetic waves emitted by stars the sun warms the earth by emitting radiant energy.
The tilt of the Earth's axis of rotation relative to the ecliptic
circut types
Mass
Radiation
50. A nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy
Nuclear Fusion
oscilloscope
Calorimeter
Halogens
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