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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. (of a chemical reaction or compound) occurring or formed with absorption of heat. Absorbs energy from its surroundings.
Push & Pull
Mole
Endothermic
Nuclear energy
2. You see your reflection
When light hits a smooth and shiny surface
Alkali metals are
Louis Pasteur
Composition reaction
3. Heat absorbed or radiated during a change of phase at a constant temperature and pressure - the amount of heat required to undergo a phase change
Two types of wave interference are (sound related)
Composition reaction
Physical properties of Meralliods
Latent heat
4. When measuring the volume of water in a graduated cylinder where does one read the measurement?
At the bottom of the meniscus curve
Kinetic Molecular theory
OHMS law
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?
5. Finding that a solution conducts an electric current shows conclusively that the solution...
Pitch
Condensation
Contains ions
Types of potential energy?
6. 1. Liquid crystals - when certain solids melt their crystal lattices disintegrate & their particles lose their 3- dimensional pattern. 2. Solid - as a liquid substance cools & forms a solid. The strong attractive forces between oppositely charges ion
Mass
Ionic Bonds
OHMS law
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
7. The relationship between voltage - current - and resistance - V=IR
Boron
OHMS law
conducted more easily
isotopes of each other
8. Two or more simple machines working together EX. wheelbarrow it uses level - wheel & axle.
Types of Friction & Resistance
Louis Pasteur
Compound machines
alloy
9. ______ of an atom is equal to the # of protons plus the # of protons plus the # of neutrons
Atomic mass
Calorie
Hydrocarbons
Kinetic Molecular theory
10. The device (bell or Build) is an example of a load. A load is a device that uses energy.
Latent heat
Alkali metals are
Group 2 on the periodic table
Load & switch
11. 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.
Thermal equilibrium
Density
isotopes of each other
As the train approaches and blasts its whistle - the whistle sounds..
12. The property of sound that varies with variation in the frequency of vibration.
Mass number
On the periodic table which elements are grouped by color
Pitch
Endothermic
13. Non - metals - group 18 - the most non - reactive elements
Power
Noble gasses
The electromagnetic spectrum
Gay - Lussac's Law
14. Compounds that speed up chemical reactions. Sometimes without Catalysts reactions cant occur.
Some substances have no noticeable odor because these substances
Hecto
Venturi effect
Catalysts
15. The number of electrons per second that flow past a point in a circut.
Latent heat
Condensation
Current
Some characteristics of crystals
16. Average mass of various isotopes of the element.
Hydrocarbons
alloy
Atomic mass
Insulator
17. Liter is the base unit of...
Some characteristics of crystals
Atom
Volume
Nuclear Fusion
18. F - branch of chemistry that deals with the chemical action of electricity and the production of electricity by chemical reactions
Electrochemistry
Doppler effect
Thermal equilibrium
Group 1 on the periodic table are all
19. Potential & Kinetic
Contains ions
Louis Pasteur
Nuclear energy
What are the 2 most common encountered forms of energy are
20. 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
Resistance
Straight line motion
Kilo
21. Is a simple device used to indicate the existence of a positive or negative charge.
Eyeglasses are ____ so the image will hit the retina
electroscope
The intensity of sound is measured in
Newtons 2nd law of motion
22. Is the transfer of energy by waves such as the electromagnetic waves emitted by stars the sun warms the earth by emitting radiant energy.
Radiation
Chemical bond
types of particles in the nucleus?
Deci
23. Gram is the base unit of...
Black
Insulator
Milli
Mass
24. Atoms with an equal # of protons and electrons.
Ions are
Thermal contact
Semi - conductors
Pull of gravity
25. Pressure is measures in a unit called
Pascal
Nuclear Fusion
Mass number
Fahrenheit
26. A wave in which the particles of the medium move perpendicularly to the direction the wave is traveling
Difference between metals & non - metals
Avogadros hypothesis
Transverse Waves
Carbon Dioxide
27. 1/1000 the base unit
Radiation
Milli
Louis Pasteur
Isotopes
28. Alkaline earth metals
Alkali metals are
Radioactive Particles
Compound machines
Group 2 on the periodic table
29. Equal volumes of gases at the same temperature and pressure contain equal numbers of particles
electroscope
Gay - Lussac's Law
Avogadros hypothesis
Condensation
30. Is the path along which electrons flow
true of hurricanes but not of tornadoes
Destructive interference
Circut
types of nuclear reactions?
31. Temporary magnets that lose their magnetism when electric current is removed
Electromagnets
Rubbing
Chromatography
Heat Fusion
32. Is the change from liquid to gas.
Laws of thermodynamic / Laws of conservation
Entropy
Heat vaporization
Evaporation
33. Harder - denser - have higher melting points & are chemically active.
Isotopes
Celsius
Inertia & circular motion
Alkaline earth metals are
34. Submarines - diving weighting system - naval architecture - Flotation - Buoyancy compensator
Applications of Archimedes principle
alloy
Heat vaporization
When light hits a smooth surface
35. An electric circut with a single path
Series circut
Physical properties of Meralliods
Atomic mass
Magnetic field
36. Uses percent light absorbance to measure a color change - thus giving qualitative data using quantitative value - measures light intensity as a function of color - or more specifically - the wavelength of light.
Spectrophotometry
Catalysts
Conduction
Compound machines
37. The acceleration of an object depends on the mass of the object and the amount of force applied.
Newtons 2nd law of motion
Fahrenheit
sulfhydryl group (Functional Group)
Nuclear fission
38. The buoyant force on an object is equal to the weight of the fluid displaced by the object
Semi - conductors
Archimedes principle
Carbonyl Group (Functional Group)
chemically active
39. Atoms of the same element that have different numbers of neutrons
Thermal equilibrium
Isotopes
Radiation
Energy
40. Ratio of the density of a substance to the density of water
Specific gravity
OHMS law
Forces on a moving object
oscilloscope
41. Do not have molecules with one of the two molecular arrangements required to give an odor
Louis Pasteur
Some substances have no noticeable odor because these substances
same
Kinetic energy
42. Discovered in the late 1800s that micro organisms play a casual role in onset of a disease
Louis Pasteur
Some substances have no noticeable odor because these substances
true of hurricanes but not of tornadoes
Evaporation
43. Decibels
The intensity of sound is measured in
Kilo - calorie
Types of kinetic energy?
Deci
44. A nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy
maximum number of electrons that an atom holds with one energy level
Nuclear fission
Mass
Carbon Dioxide
45. A circut with two or more resistors where the electricity has more than one path to travel
maximum number of electrons that an atom holds with one energy level
Difference between metals & non - metals
Push & Pull
Parallel Circut
46. The principle of conservation of energy: Energy can be transferred and transformed - but it cannot be created or destroyed.
Atomic number
First law of thermodynamics
64.0 grams
Neutrons
47. Heat transferred by direct contact
Kinetic Molecular theory
Conduction
Mass number
Bernoulli principle
48. The theory that all matter is composed of particles (atoms and molecules) moving constantly in random directions
Eyeglasses are ____ so the image will hit the retina
Chemical bond
Insulator
Kinetic Molecular theory
49. 1. Have some characteristics of metals & non - metals. 2. Properties do not follow patterns like metals & non - metals.
Pasteur's postulate
Laws of thermodynamic / Laws of conservation
Chemical properties of metalliods
Pitch
50. Most directly involved with controlling levels of sugar in blood
Volume
Kinetic energy
Potential energy
Insulin