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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. Measure of the earth's pull
Single replacement reaction
As the train approaches and blasts its whistle - the whistle sounds..
An electromagnet can be made more powerful in 3 ways
Weight
2. A Compound breaks down into 2 or more simpler substances EX. AB -> A+B
Decomposition reaction
Magnetic field
What are the 2 most common encountered forms of energy are
Covalent Bonds
3. Harder - denser - have higher melting points & are chemically active.
Buret
Parallel Circut
Current
Alkaline earth metals are
4. The ability of the material to oppose the flow of electrons through it all
Resistance
Some substances have no noticeable odor because these substances
Forces on objects at rest
Hydrophobic
5. Are small positively charged particles
Fahrenheit
Grounding Charge
Protons
Types of Friction & Resistance
6. 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.
Catalysts
Spectrophotometry
Electrochemistry
Hydrophobic
7. The mechanical energy that a body has by virtue of its position Ex. Stored energy -
Atom
Insulin
potential energy
alloy
8. Meter is the base unit of...
Chemical reactions
Ionic Bonds
Length
Constructive interference
9. A temperature scale with the freezing point of water 32 degrees and the boiling point of 212 degrees.
Heat transfer
Radiation
types of particles in the nucleus?
Fahrenheit
10. 1/1000 the base unit
Charles law
Milli
Mass number
When a light hits a rough surface
11. Force of attraction that holds atoms together - when atoms are bonded chemically they give up their individual properties.
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?
Boyles law states
Chemical bond
OHMS
12. Mass of the substance contained per unit of volume
Non - electrolytes
Noble gasses
64.0 grams
Density
13. The speed of light changes in different materials this is due to__
Chordates
Atomic mass
Refraction
Heat transfer
14. The amount of heat it takes to change a solid to a liquid
Rubbing
same
Latent heat
Alkali metals are
15. According to some scientists - the Earth's average surface temperature is rising as a result of the greenhouse effect. An increase in the atmospheric concentration of which of the following gases is considered to be primarily responsible
Sonar technology
Load & switch
Carbon Dioxide
Pascal
16. (of a chemical reaction or compound) occurring or formed with absorption of heat. Absorbs energy from its surroundings.
Heat conduction
Endothermic
Pitch
Heat is transferred in 3 ways
17. Is the measure of energy temperature is a measure of the heat in an object.
Heat
Valence electrons
Alkaline earth metals are
Silicon
18. 1. Like charges repel one another - 2. Opposite charges attract each other - 3. charge is considered a neutral object has no net charge.
Electricity charged objects share these characteristics (3)
Semi - conductors
Electrons
OHMS law
19. Heat energy that is transferred into or out of a system
Heat transfer
Types of kinetic energy?
newtons first law of motion
When light hits a smooth and shiny surface
20. Pushing a vacuum cleaner or pulling a bowstring applies muscular force when the muscles expand & contract elastic force occurs when an object returns to its original shape (for example - when a bow is released)
Push & Pull
Water
Applications of Archimedes principle
Hydrocarbons
21. Substance that dissociates completely into its ions when added to water and conducts electricity well.
Non - metals
Strong electrolytes
Double replacement Reactions
Inside the nucleus
22. Which of the following parts of the Sun is easily visible only during a total solar eclipse
Circut
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?
Pascal
Corona
23. P1/T1=P2/T2. States that the pressure of a fixed amount of gas in a fixed volume is proportional to its temperature.
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24. Removal of static electricity by conduction
Excited electrons
Grounding Charge
Metalloids
Law of momentum conservation
25. Electrical - Light (radiant) - Heat (thermal) - Movement
Types of kinetic energy?
Conduction
Heat vaporization
Some substances have no noticeable odor because these substances
26. Pressure is measures in a unit called
Black
Magnetic domains
Pascal
Decomposition reaction
27. Average mass of various isotopes of the element.
Length
Types of kinetic energy?
Alkali metals are
Atomic mass
28. Inclined plane - lever - wheel & axle - pulley.
Magnetic field
Simple machines
Mass
electroscope
29. The region around a magnet where the magnetic force is exerted
Mass
Difference between metals & non - metals
Some characteristics of crystals
Magnetic field
30. Transfer of thermal energy with in a fluid. The particles in a fluid transfer the thermal energy from hot areas to cooler areas EX. the warmed up rising air from a heat source such as a fire or electric heater.
Convection
Destructive interference
isotopes of each other
Latent heat
31. 1. nuclear reaction 2. radioactive
Alkali metals are
Non - metals
Resistance
During ____ elements change into other elements change into other elements called _____ elements.
32. Metric unit for measuring temperature; On this scale water freezes at zero and boils at 100.
Buret
Dynamics
Celsius
Condensation
33. Higher because it has higher apparent frequency.
Forces on a moving object
As the train approaches and blasts its whistle - the whistle sounds..
Boron
electroscope
34. Not as easy to recognize as metal bc they do not always share physical properties. They are dull - brittle - & not good conductors of heat
Exothermic
Mole
Non - metal
OHMS law
35. Lacking affinity for water. Repels water. Non - polar
Simple machines
Grounding Charge
Hydrophobic
Milli
36. Alkali Metals are the most _____________
Mass
Mole
The higher the voltage
chemically active
37. Is the transfer of energy by waves such as the electromagnetic waves emitted by stars the sun warms the earth by emitting radiant energy.
Thermal contact
Stable electron arrangement
Black
Radiation
38. Where are protons an neutrons located?
Non - electrolytes
same
Lewis dot structures
Inside the nucleus
39. Do not have molecules with one of the two molecular arrangements required to give an odor
Some substances have no noticeable odor because these substances
Archimedes principle
sulfhydryl group (Functional Group)
Thermal equilibrium
40. The difference in electrical charge between two points in a circuit expressed in volt. When an electron goes through a load it does work & loses some energy.
Potential difference
Doppler effect
Insulin
Magnetic domains
41. Potential & Kinetic
Louis Pasteur
Non - metal
Types of Friction & Resistance
What are the 2 most common encountered forms of energy are
42. 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
Chemical bond
alloy
The intensity of sound is measured in
Deca
43. The volume of a gas is directly proportional to the temperature of a gas
Charles law
Newton's 3rd law motion
Chromatography
Boyles law states
44. The branch of physics that deals with static electricity - study of stationary electric charges.
Convection
Covalent Bonds
First law of thermodynamics
electrostatics
45. The theory that all matter is composed of particles (atoms and molecules) moving constantly in random directions
types of nuclear reactions?
Kinetic Molecular theory
An electromagnet can be made more powerful in 3 ways
Corona
46. A buret is used to deliver solution in precisely - measured - variable volumes. deliver one reactant until the precise end point of the reaction is reached.
Buret
Hecto
oscilloscope
Mass
47. Atoms of the same element that have different numbers of neutrons
Circut
Chordates
newtons first law of motion
Isotopes
48. The relationship between voltage - current - and resistance - V=IR
Buret
OHMS law
Mass number
Constructive interference
49. The amount of energy required to change a substance from the solid phase to the liquid phase at its melting point
Force
Heat Fusion
Chromatography
Some characteristics of crystals
50. (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.
Corona
Bernoulli principle
Law of momentum conservation
Nuclear reaction