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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. Group 17; contains nonmetals; 7 electrons in its outermost energy level; very reactive; poor conductors of electric current; never in its uncombined form in nature; combine with most metals to form salts
Halogens
Alkaline earth metals are
Work
When light hits a smooth and shiny surface
2. A Compound breaks down into 2 or more simpler substances EX. AB -> A+B
Eyeglasses are ____ so the image will hit the retina
When light hits a smooth surface
Decomposition reaction
Inertia & circular motion
3. The centripetal force is provided by the high banking of the curved road & by friction between the wheels & the road.
Strong electrolytes
2nd law of thermodynamics
true of hurricanes but not of tornadoes
Inertia & circular motion
4. The ability of the material to oppose the flow of electrons through it all
Weight
Types of potential energy?
Resistance
Archimedes principle
5. Is the measure of energy temperature is a measure of the heat in an object.
Heat
First law of thermodynamics
Static friction
Calorie
6. 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.
Static friction
3rd law of thermodynamics
Pasteur's postulate
Hydroxyl group ( Functional group)
7. The total entropy of a system plus that of its surroundings always increase.
Thermal contact
Force
Pull of gravity
2nd law of thermodynamics
8. Animals in which of the following groups may have a backbone and a spinal cord?
Thermal contact
Chordates
Work
Pitch
9. The relationship between voltage - current - and resistance - V=IR
Phosphate group
OHMS law
Chemical bond
Destructive interference
10. Parts of 2 compounds replace each other. Ex. Switch partners AX + BY -> AY + BX
Double replacement Reactions
Pascal
chemically active
Atomic mass
11. The property of sound that varies with variation in the frequency of vibration.
Pitch
Semi - conductors
Non - electrolytes
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?
12. When you step out of the shower the floor feels colder on your feet than the bathmat. Because heat is ______________ to the floor.
Some characteristics of crystals
Endothermic
conducted more easily
Kilo - calorie
13. 1. Constructive 2. Destructive
Eyeglasses are ____ so the image will hit the retina
During ____ elements change into other elements change into other elements called _____ elements.
Two types of wave interference are (sound related)
Density
14. 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
Strong electrolytes
alloy
When light hits a smooth surface
Metalloids
15. 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
Phosphate group
Mass
Heat Fusion
16. The molecular weight of a substance expressed in grams - measures the amount of a substance
Mole
Kinetic energy
Heat vaporization
Eyeglasses are ____ so the image will hit the retina
17. Mass & weight are not the ____ quality
Destructive interference
Hecto
Direct Variations
same
18. Small uncharged particles in the nucleus they are neutral
An electromagnet can be made more powerful in 3 ways
Some substances have no noticeable odor because these substances
Nuclear energy
Neutrons
19. The principle of conservation of energy: Energy can be transferred and transformed - but it cannot be created or destroyed.
Fahrenheit
Difference between metals & non - metals
Non - metals
First law of thermodynamics
20. 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
Noble gasses
oscilloscope
Heat vaporization
21. Friction opposes the motion of one surface past another - Friction is common when slowing down a car or sledding down a hill.
Rubbing
Pitch
Group 2 on the periodic table
Mole
22. 1/10 the base unit
Deci
Inside the nucleus
Group 2 on the periodic table
Nuclear energy
23. Electrical - Light (radiant) - Heat (thermal) - Movement
Phases of matter
Spectrophotometry
conducted more easily
Types of kinetic energy?
24. (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.
Nuclear reaction
Chemical bond
Milli
Length
25. Heat transferred by fluid current
The higher the voltage
Deca
Electrophoresis
Convection
26. Nuclear fission - Nuclear Fusion
types of nuclear reactions?
Noble gasses
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
Covalent Bonds
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
Sonar technology
Black
alloy
Some characteristics of crystals
28. Have properties in between metals and non - metals found in groups 13-16
Metalloids
Thermal equilibrium
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
Composition reaction
29. 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.
Entropy
Evaporation
Heat conduction
Bernoulli principle
30. Energy is added to a system one of two things must happen either thermal energy must increase or work must be done.
During ____ elements change into other elements change into other elements called _____ elements.
true of hurricanes but not of tornadoes
Laws of thermodynamic / Laws of conservation
Latent heat
31. A heat that required to change (water from liquid to solid) from one state to another.
Kilo
Electrochemistry
Heat latent
sulfhydryl group (Functional Group)
32. They form only over warm oceans
true of hurricanes but not of tornadoes
Nuclear Fusion
An electromagnet can be made more powerful in 3 ways
maximum number of electrons that an atom holds with one energy level
33. The transfer of heat by electromagnetic waves is called?
Radiation
Evaporation
Electromagnets
Electrons
34. Solid has a definite shape and volume - Liquid has definite volume - but no shape - Gas has no shape of volume.
OHMS law
Phases of matter
Ionic Bonds
Catalysts
35. That for a fixed amount of gas at a constant temperature - the volume of a gas increases as its pressure decreases
Isotopes
Double replacement Reactions
Boyles law states
The intensity of sound is measured in
36. Describes the force of friction of 2 surfaces that are in contact but do not have any motion relative to eachother.
Nuclear energy
Water
Static friction
Parallel Circut
37. Inclined plane - lever - wheel & axle - pulley.
Simple machines
Evaporation
The intensity of sound is measured in
Bernoulli principle
38. Atoms of the same element that have different numbers of neutrons
Types of kinetic energy?
Heat Fusion
Isotopes
types of particles in the nucleus?
39. 1.) Protons 2.) Neutrons - They both have the same mass - but neutrons have no mass.
Atomic number
Isotopes
types of particles in the nucleus?
Charles law
40. The interference that occurs when two waves combine to make a wave with a larger amplitude
Group 2 on the periodic table
3rd law of thermodynamics
OHMS law
Constructive interference
41. Objects are in thermal contact if they can affect each others temperature
Electrophoresis
types of particles in the nucleus?
Pitch
Thermal contact
42. Not as easy to recognize as metal bc they do not always share physical properties. They are dull - brittle - & not good conductors of heat
Non - metal
Types of Friction & Resistance
Centrifuge
Heat latent
43. 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.
Specific gravity
Types of potential energy?
Forces on objects at rest
Law of momentum conservation
44. Resistance is measured in...
OHMS
Carbon Dioxide
Grounding Charge
Boyles law states
45. Specific gravity is the ratio based on...
3rd law of thermodynamics
Neutrons
Kilo
Density
46. Symmetry - crystalline structures are universal - Crystallographic defects - Electrical properties - crystal system
Some characteristics of crystals
birds
Heat is transferred in 3 ways
Potential difference
47. 8 electrons
maximum number of electrons that an atom holds with one energy level
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
Non - metal
Electrons
48. When measuring the volume of water in a graduated cylinder where does one read the measurement?
Laws of thermodynamic / Laws of conservation
Deca
At the bottom of the meniscus curve
Celsius
49. When force is applied to an object it moves in a straight line and adding force can make it go faster or slow down.
Insulator
Straight line motion
Longitudinal Waves
Corona
50. Negatively charged particles found outside the nucleus
Composition reaction
Deci
Electrons
Phosphate group