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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.
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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 done on an object when an applied force moves across a distance.
Insulator
Applications of Archimedes principle
Work
Nuclear Fusion
2. Liter is the base unit of...
Mass
Chordates
Circut
Volume
3. The transfer of heat by electromagnetic waves is called?
The presence of cells in the sample
Covalent Bonds
Radiation
Resistance
4. 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
Heat is transferred in 3 ways
Heat Fusion
Kinetic Friction
5. Alkaline earth metals
3rd law of thermodynamics
Gay - Lussac's Law
Group 2 on the periodic table
alloy
6. The amount of heat it takes to change a solid to a liquid
Neutrons
Convection
same
Latent heat
7. 100x the base unit
Hecto
Heat Fusion
chemically active
Heat is transferred in 3 ways
8. What are the # of protons in the nucleus of an atom called?
Valence electrons
Atomic number
Length
Evaporation
9. 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
Linear acceleration
Eyeglasses are ____ so the image will hit the retina
Pull of gravity
10. Mass & weight are not the ____ quality
same
Decomposition reaction
Magnetic domains
Group 1 on the periodic table are all
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.
Dynamics
Electromagnets
Length
Law of momentum conservation
12. Organic molecules that are composed of only carbon and hydrogen.
What are the 2 most common encountered forms of energy are
Hydrocarbons
Kinetic energy
Latent heat
13. Excess energy is released into the environment
Potential difference
Mass
Heat transfer
Exothermic
14. A boulder is sitting at the edge of the cliff it has which type of energy?
same
Potential energy
maximum number of electrons that an atom holds with one energy level
Simple machines
15. Symmetry - crystalline structures are universal - Crystallographic defects - Electrical properties - crystal system
Isotopes
Some characteristics of crystals
Heat conduction
Magnetic domains
16. (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.
Magnetic domains
Ionic Bonds
Strong electrolytes
Nuclear reaction
17. Solids - gasses - and 1 liquid (Bromine)
Nuclear Fusion
Non - metals
Evaporation
Sonar technology
18. An electric circut with a single path
64.0 grams
Composition reaction
Difference between metals & non - metals
Series circut
19. The total entropy of a system plus that of its surroundings always increase.
2nd law of thermodynamics
Milli
64.0 grams
At the bottom of the meniscus curve
20. Elements in the middle of the periodic table - in groups 3-12.
Deca
Conduction
Transition elements
Black
21. 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)
Halogens
Push & Pull
Lewis dot structures
Gay - Lussac's Law
22. Small uncharged particles in the nucleus they are neutral
Neutrons
Electrophoresis
Magnetic field
Evaporation
23. 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
Energy
Thermal equilibrium
Kelvin
24. Measures the amount of matter in an object
Group 1 on the periodic table are all
Mass
Archimedes principle
Latent heat
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.
Electrochemistry
Centrifuge
Isotopes
Forces on a moving object
26. The number of electrons per second that flow past a point in a circut.
Atomic mass
Current
Charles law
Water
27. The process of heat transfer via solid contact
Stable electron arrangement
Heat conduction
Milli
Ionic Bonds
28. Temporary magnets that lose their magnetism when electric current is removed
Electromagnets
Magnetic domains
Doppler effect
Celsius
29. 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.
potential energy
Noble gasses
The electromagnetic spectrum
Linear acceleration
30. 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
Constructive interference
types of particles in the nucleus?
Centrifuge
Rubbing
31. A nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy
The presence of cells in the sample
Nuclear Fusion
Phases of matter
Excited electrons
32. The mechanical energy that a body has by virtue of its motion - energy of a moving object.
Kinetic energy
Potential energy
Deci
Conduction
33. The force of attraction between two objects. Gravity exists not only on earth - but also between planets as well as in black wholes
When light hits a smooth surface
Refraction
Nucleus
Pull of gravity
34. Alkali Metals are the most _____________
chemically active
Atomic mass
Kelvin
Entropy
35. Energy is added to a system one of two things must happen either thermal energy must increase or work must be done.
Simple machines
Laws of thermodynamic / Laws of conservation
When light hits a smooth surface
Nuclear Fusion
36. Most directly involved with controlling levels of sugar in blood
Electricity charged objects share these characteristics (3)
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?
Insulin
Silicon
37. Describes the force of friction of 2 surfaces in contact with eachother . When there is relative motion between the surface.
Phases of matter
chemically active
Kilo - calorie
Kinetic Friction
38. Harder - denser - have higher melting points & are chemically active.
Alkaline earth metals are
the mass number of an atom
Black
Radiation
39. They form only over warm oceans
true of hurricanes but not of tornadoes
Nuclear energy
Non - electrolytes
Kilo
40. Solutes that have bonds; no electrically charged species are created when they dissolve in water; glucose; lipids; urea
Sonar technology
Non - electrolytes
Radiation
Heat vaporization
41. Submarines - diving weighting system - naval architecture - Flotation - Buoyancy compensator
Avogadros hypothesis
Push & Pull
Applications of Archimedes principle
Calorimeter
42. Measure of the disorder or randomness of the particles that make of a system (measurement of movement of particles in a spontaneous reaction) EX. entropy increases as matter and energy in the universe degrade to an ultimate state of inert uniformity.
Convection
conducted more easily
Entropy
newtons first law of motion
43. A carbon atom linked by a double bond to an oxygen atom. - c=o.
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
Carbonyl Group (Functional Group)
Conduction
Energy
44. A mixture containing two or more metallic elements or metallic and nonmetallic elements usually fused together or dissolving into each other when molten Ex. Brass is an alloy of zinc and copper
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?
alloy
Two types of wave interference are (sound related)
Gay - Lussac's Law
45. 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.
Bernoulli principle
The presence of cells in the sample
Inertia & circular motion
Hydrophobic
46. Decibels
The intensity of sound is measured in
Some substances have no noticeable odor because these substances
Heat vaporization
Deci
47. A principle that states that for every action there is an equal reaction in the opposite direction
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48. Electrons in the outermost energy level; they are involved in bond formation
Direct Variations
Boron
Celsius
Valence electrons
49. Is the work done divided by the amount of the time it took to do it. P= w/t
Newtons 2nd law of motion
On the periodic table which elements are grouped by color
Power
Inside the nucleus
50. Making and breaking of chemical bonds between atoms bonds involve only the outer electrons & do not effect the nucleus
Mass
Chemical reactions
2nd law of thermodynamics
Kinetic Friction
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