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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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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 agent most widely and most consistently at work changing the appearance of the Earth's surface
Heat is transferred in 3 ways
Non - electrolytes
Conduction
Water
2. 100x the base unit
Hecto
Conduction
Atomic number
Semi - conductors
3. Temporary magnets that lose their magnetism when electric current is removed
Electromagnets
Single replacement reaction
Heat latent
Nuclear Fusion
4. Stored mechanical - Nuclear - Chemical - gravitational
Atomic number
Inside the nucleus
Forces on objects at rest
Types of potential energy?
5. The object is further than one focal length from the lens
Linear acceleration
Resistance
A converging lens produces a real image when
Celsius
6. A gelatinous sample of material from a previously unexplored marine environment is thought to be living or to be composed of recently living material. Which of the following would most clearly confirm that the material has a biological origin?
The presence of cells in the sample
The electromagnetic spectrum
Gay - Lussac's Law
Work
7. Measures the amount of matter in an object
Magnetic domains
Ions are
Kilo - calorie
Mass
8. Making and breaking of chemical bonds between atoms bonds involve only the outer electrons & do not effect the nucleus
Archimedes principle
Energy
Centrifuge
Chemical reactions
9. # of protons + # of neutrons
Potential difference
Mass number
Inertia & circular motion
Pascal
10. Removal of static electricity by conduction
A converging lens produces a real image when
chemically active
3rd law of thermodynamics
Grounding Charge
11. 10x the base unit
Deca
Length
The electromagnetic spectrum
Pull of gravity
12. Formed when one or more electrons are transferred from one atom to another. Transfer of electrons happens when metals & non - metals bond.
Circut
Ionic Bonds
Nuclear reaction
Some Uses of electricity
13. An isotope has a different number of...
Protons
Refraction
Charles law
Neutrons
14. Gram is the base unit of...
Water
Mass
Radiation
Latent heat
15. Harder - denser - have higher melting points & are chemically active.
Conduction
Some characteristics of crystals
Alkaline earth metals are
Excited electrons
16. (of a chemical reaction or compound) occurring or formed with absorption of heat. Absorbs energy from its surroundings.
Insulin
Endothermic
Strong electrolytes
Law of momentum conservation
17. Electrons in the outermost energy level; they are involved in bond formation
Valence electrons
Kinetic Friction
Seismographs
Density
18. The acceleration of an object depends on the mass of the object and the amount of force applied.
Heat is transferred in 3 ways
Isotopes
Law of momentum conservation
Newtons 2nd law of motion
19. 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.
Hecto
Forces on objects at rest
Chemical reactions
Some substances have no noticeable odor because these substances
20. Is the path along which electrons flow
Energy
Circut
Neutrons
When light hits a smooth surface
21. Liter is the base unit of...
Heat Fusion
Density
Volume
chemically active
22. Heat energy that is transferred into or out of a system
64.0 grams
Heat transfer
Hydrophobic
Mole
23. Where are protons an neutrons located?
Volume
The presence of cells in the sample
Inside the nucleus
Insulator
24. Pressure is measures in a unit called
Archimedes principle
Pascal
Corona
Compound machines
25. The center of the atom.
Some Uses of electricity
Constructive interference
Heat is transferred in 3 ways
Nucleus
26. Most directly involved with controlling levels of sugar in blood
Celsius
Insulin
Phosphate group
Work
27. 1. Like charges repel one another - 2. Opposite charges attract each other - 3. charge is considered a neutral object has no net charge.
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?
Milli
Electricity charged objects share these characteristics (3)
Mass
28. An electric circut with a single path
Milli
Series circut
Destructive interference
Heat Fusion
29. Used in electrical devices that have to function at temperatures too high for metals.
Destructive interference
Valence electrons
Forces on a moving object
Semi - conductors
30. 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.
oscilloscope
Composition reaction
Mass
Boron
31. Describes the force of friction of 2 surfaces that are in contact but do not have any motion relative to eachother.
Weak Electrolytes
Potential energy
Volume
Static friction
32. Is the transfer of energy by waves such as the electromagnetic waves emitted by stars the sun warms the earth by emitting radiant energy.
Decomposition reaction
Simple machines
Refraction
Radiation
33. 2 or more substances combine to form a compound EX. A+B -> AB
Composition reaction
Physical properties of Meralliods
Kelvin
Difference between metals & non - metals
34. Polar molecules
Parallel Circut
oscilloscope
Centrifuge
Hydrophilic
35. Reflects the light in one direction
Deca
When light hits a smooth surface
Louis Pasteur
Spectrophotometry
36. Lacking affinity for water. Repels water. Non - polar
Hydrophobic
Types of potential energy?
Kinetic energy
Gay - Lussac's Law
37. The relationship between voltage - current - and resistance - V=IR
OHMS law
Volume
Heat
Lewis dot structures
38. Inclined plane - lever - wheel & axle - pulley.
Deci
Seismographs
Simple machines
Convection
39. Decibels
The intensity of sound is measured in
Mole
Two types of wave interference are (sound related)
What are the 2 most common encountered forms of energy are
40. Potential & Kinetic
Fahrenheit
Length
What are the 2 most common encountered forms of energy are
Hydrocarbons
41. Atoms of the same element that have different numbers of neutrons
Conduction
Thermal equilibrium
Isotopes
Physical properties of Meralliods
42. A boulder is sitting at the edge of the cliff it has which type of energy?
Potential energy
Deci
A converging lens produces a real image when
Types of Friction & Resistance
43. A wave in which the particles of the medium move perpendicularly to the direction the wave is traveling
Buret
Length
Transverse Waves
Some Uses of electricity
44. Parts of 2 compounds replace each other. Ex. Switch partners AX + BY -> AY + BX
Non - metal
Double replacement Reactions
When a light hits a rough surface
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
45. 1/1000 the base unit
Milli
Nuclear reaction
Some characteristics of crystals
Boyles law states
46. The amount of energy required to change a substance from the solid phase to the liquid phase at its melting point
Heat Fusion
2nd law of thermodynamics
conducted more easily
Bernoulli principle
47. The branch of physics that deals with static electricity - study of stationary electric charges.
Radioactive Particles
birds
A converging lens produces a real image when
electrostatics
48. It is second element in group 14 - semi - conductor. Sand is made of silicon - it is also used to manufacture glass and cement.
Group 2 on the periodic table
Isotopes
Silicon
Hydrophobic
49. Elements in the middle of the periodic table - in groups 3-12.
Metalloids
Transition elements
Law of momentum conservation
Potential difference
50. 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.
Kinetic Friction
Fahrenheit
Force
Thermal equilibrium
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