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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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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. 1. Have some characteristics of metals & non - metals. 2. Properties do not follow patterns like metals & non - metals.
The higher the voltage
Deca
Nuclear Fusion
Chemical properties of metalliods
2. (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.
Direct Variations
Some substances have no noticeable odor because these substances
Nuclear reaction
Electricity charged objects share these characteristics (3)
3. An object's _____ gives it resistance to change its current state of motion it is also the measure of an objects resistance to acceleration.
Chemical bond
Transition elements
conducted more easily
Mass
4. A heat that required to change (water from liquid to solid) from one state to another.
Endothermic
Kinetic Friction
Circut
Heat latent
5. A unit of heat equal to the amount of heat required to raise the temperature of one kilogram of water by one degree at one atmosphere pressure. used by nutritionists to characterize the energy - producing potential in food
Dynamics
Charles law
Kilo - calorie
Deca
6. Is the path along which electrons flow
Fahrenheit
2nd law of thermodynamics
Mass
Circut
7. Describes the force of friction of 2 surfaces that are in contact but do not have any motion relative to eachother.
Electrons
Static friction
Straight line motion
Strong electrolytes
8. Substance that dissociates completely into its ions when added to water and conducts electricity well.
Strong electrolytes
Corona
When light hits a smooth surface
Heat is transferred in 3 ways
9. The force of attraction between two objects. Gravity exists not only on earth - but also between planets as well as in black wholes
Chromatography
Rubbing
Resistance
Pull of gravity
10. The centripetal force is provided by the high banking of the curved road & by friction between the wheels & the road.
Parallel Circut
Inertia & circular motion
Heat latent
Power
11. 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.
Latent heat
Parallel Circut
Convection
Buret
12. The branch of physics that deals with static electricity - study of stationary electric charges.
isotopes of each other
Specific gravity
electrostatics
Centrifuge
13. A nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy
Nuclear Fusion
Atomic mass
Strong electrolytes
Radioactive Particles
14. Animals in which of the following groups may have a backbone and a spinal cord?
OHMS law
Deca
Chordates
types of nuclear reactions?
15. The mechanical energy that a body has by virtue of its position Ex. Stored energy -
Grounding Charge
Pull of gravity
potential energy
Rubbing
16. 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.
Forces on a moving object
Grounding Charge
Condensation
Spectrophotometry
17. A wave in which the particles of the medium move perpendicularly to the direction the wave is traveling
Transverse Waves
Law of momentum conservation
Density
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?
18. (physics) the capacity of a physical system to do work - or supply heat.
Milli
Energy
Difference between metals & non - metals
Charles law
19. Solid has a definite shape and volume - Liquid has definite volume - but no shape - Gas has no shape of volume.
Phases of matter
Valence electrons
Heat transfer
Some substances have no noticeable odor because these substances
20. Conduction - Convection - & Radiation
Magnetic domains
Heat is transferred in 3 ways
Contains ions
Boyles law states
21. 1/10 the base unit
Buret
Lewis dot structures
Deci
Convection
22. Non - metals - group 18 - the most non - reactive elements
Thermal equilibrium
Noble gasses
Silicon
Destructive interference
23. Is the study of the relationship between motion & the forces affecting motion.
Contains ions
Dynamics
Nuclear Fusion
Condensation
24. 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.
Work
Kinetic Molecular theory
Nuclear energy
Types of kinetic energy?
25. Liter is the base unit of...
OHMS law
Sonar technology
Volume
Ampmeter
26. Objects are in thermal contact if they can affect each others temperature
Thermal contact
Ionic Bonds
The presence of cells in the sample
Chemical properties of metalliods
27. 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
Applications of Archimedes principle
Heat
Decomposition reaction
28. Electronic equipment that provides visual images of varying electrical quantities - Useful in studying waves b/c it gives a picture of the wave.
oscilloscope
Pasteur's postulate
chemically active
Calorimeter
29. The amount of energy required for the liquid at its boiling point to become a gas
Convection
Group 2 on the periodic table
Radiation
Heat vaporization
30. 100x the base unit
Contains ions
Some Uses of electricity
Hecto
Some characteristics of crystals
31. Two or more simple machines working together EX. wheelbarrow it uses level - wheel & axle.
Electricity charged objects share these characteristics (3)
Metalloids
Compound machines
The higher the voltage
32. They form only over warm oceans
Atomic number
Constructive interference
Covalent Bonds
true of hurricanes but not of tornadoes
33. The molecular weight of a substance expressed in grams - measures the amount of a substance
What are the 2 most common encountered forms of energy are
potential energy
Electromagnets
Mole
34. Uses the transfer of heat from one substance to another to determine the specific heat of the substance.
Nuclear reaction
Conduction
Calorimeter
Non - metal
35. Alkali metals
Length
Group 1 on the periodic table are all
Convection
potential energy
36. Number of protons
Weak Electrolytes
Atomic number
circut types
Pitch
37. # of electrons. Non - metals have 4-8 electrons in their outermost energy.
Difference between metals & non - metals
Forces on a moving object
Hydrophobic
Chordates
38. A material such as glass or porcelain with negligible electrical or thermal conductivity. Electric charges do not move easily - if at all.
maximum number of electrons that an atom holds with one energy level
The presence of cells in the sample
Mass
Insulator
39. Is the change from liquid to gas.
chemically active
Evaporation
Electromagnets
Law of momentum conservation
40. Change the chemical composition of a material - Computers can be made small enough to fit inside a plastic credit card - resistors are used to regulate volume on television or radio -
electrostatics
Some Uses of electricity
Series circut
Non - metal
41. Temporary magnets that lose their magnetism when electric current is removed
alloy
Electromagnets
Electrophoresis
Venturi effect
42. Have properties in between metals and non - metals found in groups 13-16
Nuclear fission
Boron
Metalloids
The higher the voltage
43. 1.) Protons 2.) Neutrons - They both have the same mass - but neutrons have no mass.
types of particles in the nucleus?
Thermal contact
birds
Convection
44. Current is measured with a device called...
Ampmeter
As the train approaches and blasts its whistle - the whistle sounds..
Chemical properties of metalliods
Seismographs
45. Reflects the light in one direction
When light hits a smooth surface
Series circut
Weight
Centrifuge
46. The buoyant force on an object is equal to the weight of the fluid displaced by the object
At the bottom of the meniscus curve
Straight line motion
Archimedes principle
Insulin
47. Friction opposes the motion of one surface past another - Friction is common when slowing down a car or sledding down a hill.
Evaporation
Rubbing
Bernoulli principle
Heat
48. The monovalent group - OH in such compounds as bases and some acids and alcohols. Makes the molecule polar which increases the solubility of a compound.
Hydroxyl group ( Functional group)
Electrons
OHMS law
Kelvin
49. A free element replaces an element that is a part of a compound. Ex. A +BX -> AX + B
Carbon Dioxide
Single replacement reaction
true of hurricanes but not of tornadoes
Current
50. 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
Atom
Carbon Dioxide
same
Newton's 3rd law motion
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