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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. Are small positively charged particles
Pitch
Simple machines
Ampmeter
Protons
2. The more energy the electrons have
The higher the voltage
Simple machines
Convection
Kinetic Molecular theory
3. 1. Have some characteristics of metals & non - metals. 2. Properties do not follow patterns like metals & non - metals.
Chemical properties of metalliods
Protons
Composition reaction
Boyles law states
4. Where are protons an neutrons located?
Convection
Ions are
Potential energy
Inside the nucleus
5. 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
As the train approaches and blasts its whistle - the whistle sounds..
Destructive interference
Two types of wave interference are (sound related)
6. Average mass of various isotopes of the element.
Electrophoresis
Black
Atomic mass
Latent heat
7. The mechanical energy that a body has by virtue of its position Ex. Stored energy -
Straight line motion
potential energy
When a light hits a rough surface
Alkaline earth metals are
8. A functional group consisting of a phosphorus atom covalently bonded to four oxygen atoms. Ideal for energy transfer reactions (ATP).
Simple machines
Phosphate group
Insulin
Kilo
9. The number of electrons per second that flow past a point in a circut.
Current
Grounding Charge
On the periodic table which elements are grouped by color
Heat vaporization
10. Small uncharged particles in the nucleus they are neutral
Parallel Circut
Calorie
Neutrons
Non - electrolytes
11. The amount of energy required for the liquid at its boiling point to become a gas
Heat vaporization
Electrophoresis
Rubbing
Non - metals
12. 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
Push & Pull
Physical properties of Meralliods
As the train approaches and blasts its whistle - the whistle sounds..
Centrifuge
13. 'An object at rest will remain at rest - and an object moving at a constant velocity will continue moving at a constant velocity - unless it is acted upon by an unbalanced force.' Another name is Law of Inertia
Isotopes
newtons first law of motion
Dynamics
Pascal
14. Atoms with an equal # of protons and electrons.
Ions are
Ampmeter
Non - electrolytes
Conduction
15. Energy is added to a system one of two things must happen either thermal energy must increase or work must be done.
Laws of thermodynamic / Laws of conservation
Specific gravity
Heat vaporization
the mass number of an atom
16. Atoms of the same element that have different numbers of neutrons
Law of momentum conservation
Isotopes
Charles law
64.0 grams
17. Heat transferred by direct contact
Spectrophotometry
Linear acceleration
Conduction
Chordates
18. The buoyant force on an object is equal to the weight of the fluid displaced by the object
Archimedes principle
Mole
Seismographs
Mass
19. (physics and chemistry) the smallest component of an element having the chemical properties of the element
Electrochemistry
Atom
On the periodic table which elements are grouped by color
Isotopes
20. Substance that dissociates completely into its ions when added to water and conducts electricity well.
electrostatics
Strong electrolytes
Water
Carbonyl Group (Functional Group)
21. Decibels
The intensity of sound is measured in
Some characteristics of crystals
Atomic number
Hydrophilic
22. The branch of physics that deals with static electricity - study of stationary electric charges.
Strong electrolytes
electrostatics
Corona
Nucleus
23. Equal volumes of gases at the same temperature and pressure contain equal numbers of particles
Avogadros hypothesis
Archimedes principle
Pitch
Heat conduction
24. A temperature scale with the freezing point of water 32 degrees and the boiling point of 212 degrees.
Chromatography
Fahrenheit
Bernoulli principle
Potential energy
25. When measuring the volume of water in a graduated cylinder where does one read the measurement?
Isotopes
Electrons
At the bottom of the meniscus curve
Boyles law states
26. Removal of static electricity by conduction
same
chemically active
Grounding Charge
As the train approaches and blasts its whistle - the whistle sounds..
27. The interference that occurs when two waves combine to make a wave with a smaller amplitude
Heat Fusion
Destructive interference
Transverse Waves
Forces on objects at rest
28. 1. Make more coils - 2. put an iron cover (nail) inside the coils - use more battery power
Alkaline earth metals are
At the bottom of the meniscus curve
Kelvin
An electromagnet can be made more powerful in 3 ways
29. Mass & weight are not the ____ quality
Mole
Heat vaporization
same
Thermal contact
30. Is the transfer of energy by waves such as the electromagnetic waves emitted by stars the sun warms the earth by emitting radiant energy.
Insulator
The electromagnetic spectrum
Push & Pull
Radiation
31. Two or more simple machines working together EX. wheelbarrow it uses level - wheel & axle.
Circut
Convection
The presence of cells in the sample
Compound machines
32. What quantity of oxygen - O2 - contains very nearly the same number of molecules as 36.0 grams of water - H2O?
Magnetic field
Density
Inside the nucleus
64.0 grams
33. A free element replaces an element that is a part of a compound. Ex. A +BX -> AX + B
During ____ elements change into other elements change into other elements called _____ elements.
Condensation
Simple machines
Single replacement reaction
34. The transfer of heat by electromagnetic waves is called?
Radiation
Centrifuge
The intensity of sound is measured in
Pascal
35. A functional group consisting of a sulfur atom bonded to a hydrogen atom (
Convection
same
sulfhydryl group (Functional Group)
Mass
36. A Compound breaks down into 2 or more simpler substances EX. AB -> A+B
Decomposition reaction
Resistance
Two types of wave interference are (sound related)
Archimedes principle
37. Static friction - Kinetic friction - Push & pull - rubbing - pull of gravity - forces on objects at rest - forces on a moving object - inertia & circular motion.
Chordates
Types of Friction & Resistance
Semi - conductors
Pasteur's postulate
38. 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
alloy
Density
Celsius
Double replacement Reactions
39. Friction opposes the motion of one surface past another - Friction is common when slowing down a car or sledding down a hill.
Silicon
Rubbing
Gay - Lussac's Law
Insulin
40. When you step out of the shower the floor feels colder on your feet than the bathmat. Because heat is ______________ to the floor.
Calorimeter
Work
conducted more easily
Pull of gravity
41. Measures the amount of matter in an object
Semi - conductors
Mass
Inside the nucleus
Forces on objects at rest
42. Inclined plane - lever - wheel & axle - pulley.
Nuclear reaction
Black
maximum number of electrons that an atom holds with one energy level
Simple machines
43. Uses the transfer of heat from one substance to another to determine the specific heat of the substance.
types of nuclear reactions?
Calorimeter
Conduction
Deca
44. Current is measured with a device called...
Nuclear fission
Hydrophobic
Ampmeter
Spectrophotometry
45. The device (bell or Build) is an example of a load. A load is a device that uses energy.
Isotopes
Nuclear Fusion
Potential energy
Load & switch
46. 1/10 the base unit
electrostatics
Deci
Neutrons
Direct Variations
47. 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?
The presence of cells in the sample
Linear acceleration
The electromagnetic spectrum
potential energy
48. Negatively charged particles found outside the nucleus
Calorimeter
Electrons
Electromagnets
Evaporation
49. Used in electrical devices that have to function at temperatures too high for metals.
Newton's 3rd law motion
Ampmeter
Semi - conductors
Heat
50. Finding that a solution conducts an electric current shows conclusively that the solution...
Contains ions
Mass
Strong electrolytes
potential energy