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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. Polar molecules
Hydrophilic
Radioactive Particles
Kinetic Molecular theory
Pascal
2. 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
Some Uses of electricity
Heat is transferred in 3 ways
Centrifuge
Density
3. Solutes that have bonds; no electrically charged species are created when they dissolve in water; glucose; lipids; urea
Non - electrolytes
Kilo
64.0 grams
Destructive interference
4. Is the change from liquid to gas.
Evaporation
On the periodic table which elements are grouped by color
Heat latent
Archimedes principle
5. Electrons in the outermost energy level; they are involved in bond formation
isotopes of each other
electrostatics
Spectrophotometry
Valence electrons
6. # of electrons. Non - metals have 4-8 electrons in their outermost energy.
Difference between metals & non - metals
Atomic number
Two types of wave interference are (sound related)
Circut
7. The agent most widely and most consistently at work changing the appearance of the Earth's surface
Hydrophilic
Atomic number
Water
Nuclear fission
8. Substance that dissociates completely into its ions when added to water and conducts electricity well.
Weight
Electromagnets
Strong electrolytes
chemically active
9. A boulder is sitting at the edge of the cliff it has which type of energy?
Chemical bond
Potential energy
Dynamics
During ____ elements change into other elements change into other elements called _____ elements.
10. The ability of the material to oppose the flow of electrons through it all
Resistance
An electromagnet can be made more powerful in 3 ways
At the bottom of the meniscus curve
Carbon Dioxide
11. A circut with two or more resistors where the electricity has more than one path to travel
Radiation
Kilo - calorie
Parallel Circut
Seismographs
12. Metric unit for measuring temperature; On this scale water freezes at zero and boils at 100.
The presence of cells in the sample
Celsius
Simple machines
When light hits a smooth and shiny surface
13. 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.
Nucleus
Protons
Thermal equilibrium
Decomposition reaction
14. Potential & Kinetic
What are the 2 most common encountered forms of energy are
Louis Pasteur
Double replacement Reactions
Thermal contact
15. Conduction - Convection - & Radiation
Law of momentum conservation
Heat is transferred in 3 ways
Convection
Mole
16. Elements in the middle of the periodic table - in groups 3-12.
Water
Transition elements
maximum number of electrons that an atom holds with one energy level
Ionic Bonds
17. 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.
Kelvin
Bernoulli principle
Newton's 3rd law motion
Composition reaction
18. A temperature scale with the freezing point of water 32 degrees and the boiling point of 212 degrees.
Phosphate group
Weak Electrolytes
Pull of gravity
Fahrenheit
19. It scatters light in many directions
Ions are
When a light hits a rough surface
The electromagnetic spectrum
Transition elements
20. Mass & weight are not the ____ quality
same
Constructive interference
Mass
Mole
21. 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
true of hurricanes but not of tornadoes
Push & Pull
Deci
alloy
22. 1. nuclear reaction 2. radioactive
Series circut
Static friction
Atomic mass
During ____ elements change into other elements change into other elements called _____ elements.
23. What are the # of protons in the nucleus of an atom called?
Atomic number
Composition reaction
Mass
Mass
24. Gram is the base unit of...
Mass number
Heat
Mass
Heat latent
25. When force is applied to an object it moves in a straight line and adding force can make it go faster or slow down.
chemically active
Conduction
Mass
Straight line motion
26. When measuring the volume of water in a graduated cylinder where does one read the measurement?
Chemical bond
At the bottom of the meniscus curve
Density
Push & Pull
27. The amount of energy required to change a substance from the solid phase to the liquid phase at its melting point
Latent heat
Carbon Dioxide
Grounding Charge
Heat Fusion
28. Series circut - Parallel circut
isotopes of each other
Radiation
Latent heat
circut types
29. The process of heat transfer via solid contact
Types of potential energy?
Heat conduction
electroscope
2nd law of thermodynamics
30. Solid has a definite shape and volume - Liquid has definite volume - but no shape - Gas has no shape of volume.
Nuclear fission
Phases of matter
circut types
Heat Fusion
31. The same pathogen must be found in every person with the same disease - the pathogen must be isolated & grown in a culture - when the organism is re - introduced in an experimental animal - that animal should develop the same disease originally seen
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32. Parts of 2 compounds replace each other. Ex. Switch partners AX + BY -> AY + BX
Double replacement Reactions
Boron
Nuclear Fusion
Deca
33. Submarines - diving weighting system - naval architecture - Flotation - Buoyancy compensator
chemically active
Applications of Archimedes principle
Noble gasses
Heat latent
34. Where are protons an neutrons located?
Carbonyl Group (Functional Group)
Nuclear fission
Phosphate group
Inside the nucleus
35. The amount of energy that it takes to raise one gram of water one degree celsius.
Types of kinetic energy?
Kelvin
Hecto
Calorie
36. The volume of a gas is directly proportional to the temperature of a gas
Charles law
Types of potential energy?
Radiation
First law of thermodynamics
37. Force of attraction that holds atoms together - when atoms are bonded chemically they give up their individual properties.
Work
First law of thermodynamics
Covalent Bonds
Chemical bond
38. It is second element in group 14 - semi - conductor. Sand is made of silicon - it is also used to manufacture glass and cement.
Atom
Silicon
Ions are
Carbon Dioxide
39. The force of attraction between two objects. Gravity exists not only on earth - but also between planets as well as in black wholes
Metalloids
Corona
Transition elements
Pull of gravity
40. The energy released by a nuclear reaction - binding energy is released when the nuclei of atoms are split apart in a nuclear reaction this binding energy is called nuclear energy.
Nuclear energy
Covalent Bonds
Atomic mass
During ____ elements change into other elements change into other elements called _____ elements.
41. 100x the base unit
Double replacement Reactions
Hecto
Heat is transferred in 3 ways
Force
42. The more energy the electrons have
The higher the voltage
Non - metal
Calorie
Deci
43. The center of the atom.
Kinetic energy
Chemical reactions
Simple machines
Nucleus
44. 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
Gay - Lussac's Law
Parallel Circut
Chordates
45. Heat transferred by fluid current
Simple machines
Venturi effect
Black
Convection
46. Way of keeping tract of valence electrons
Lewis dot structures
Electrons
Transverse Waves
Atom
47. Concave
Simple machines
Atomic number
Eyeglasses are ____ so the image will hit the retina
Length
48. They form only over warm oceans
true of hurricanes but not of tornadoes
Kinetic Molecular theory
Alkali metals are
Boron
49. F - branch of chemistry that deals with the chemical action of electricity and the production of electricity by chemical reactions
Calorimeter
Electrochemistry
Noble gasses
Single replacement reaction
50. Is formed when 2 atoms share electrons - covalent bonding happens among non - metals.
Convection
Kinetic Friction
Covalent Bonds
Evaporation