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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. 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.
Convection
Spectrophotometry
Hecto
Magnetic field
2. The transfer of heat by electromagnetic waves is called?
Forces on a moving object
Corona
Radiation
Nucleus
3. When you step out of the shower the floor feels colder on your feet than the bathmat. Because heat is ______________ to the floor.
Kinetic Molecular theory
Longitudinal Waves
First law of thermodynamics
conducted more easily
4. Mass & weight are not the ____ quality
newtons first law of motion
same
Weak Electrolytes
true of hurricanes but not of tornadoes
5. Is done on an object when an applied force moves across a distance.
types of particles in the nucleus?
Work
Phosphate group
Insulin
6. When force is applied to an object it moves in a straight line and adding force can make it go faster or slow down.
Some characteristics of crystals
Louis Pasteur
Straight line motion
Series circut
7. The sum of the protons and neutrons
Applications of Archimedes principle
Types of kinetic energy?
the mass number of an atom
Isotopes
8. 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?
Linear acceleration
Louis Pasteur
electrostatics
Magnetic field
9. 1000x the base unit
Kilo
Mass
Length
Corona
10. Is the measure of energy temperature is a measure of the heat in an object.
Heat
Phosphate group
Chemical bond
Some Uses of electricity
11. The interference that occurs when two waves combine to make a wave with a larger amplitude
Single replacement reaction
Calorie
Radioactive Particles
Constructive interference
12. A piece of paper that appears blue in sunlight is illuminated solely by a red light that is passed through a green filter. What color does the paper appear under this illumination?
Spectrophotometry
Volume
Phases of matter
Black
13. It is second element in group 14 - semi - conductor. Sand is made of silicon - it is also used to manufacture glass and cement.
Silicon
When light hits a smooth and shiny surface
Boron
Halogens
14. Liter is the base unit of...
Physical properties of Meralliods
Chemical properties of metalliods
Volume
Radiation
15. The number of electrons per second that flow past a point in a circut.
Current
Mass number
64.0 grams
Alkaline earth metals are
16. Submarines - diving weighting system - naval architecture - Flotation - Buoyancy compensator
Electrophoresis
Applications of Archimedes principle
Mole
Magnetic domains
17. A wave in which the particles of the medium move perpendicularly to the direction the wave is traveling
Transverse Waves
Latent heat
Neutrons
Density
18. Elements in the middle of the periodic table - in groups 3-12.
Types of Friction & Resistance
Carbon Dioxide
Catalysts
Transition elements
19. 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
types of particles in the nucleus?
First law of thermodynamics
Nuclear energy
20. Equal volumes of gases at the same temperature and pressure contain equal numbers of particles
Sonar technology
Kinetic Molecular theory
Insulator
Avogadros hypothesis
21. A principle that states that for every action there is an equal reaction in the opposite direction
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22. Measure of the earth's pull
Heat is transferred in 3 ways
Weight
Mass number
Condensation
23. 1. nuclear reaction 2. radioactive
During ____ elements change into other elements change into other elements called _____ elements.
Potential difference
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?
2nd law of thermodynamics
24. F - branch of chemistry that deals with the chemical action of electricity and the production of electricity by chemical reactions
Electrochemistry
During ____ elements change into other elements change into other elements called _____ elements.
Deci
birds
25. 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)
Chromatography
Exothermic
Difference between metals & non - metals
26. Change in the apparent frequency of a wave as observer and source move toward or away from each other
Doppler effect
Atomic mass
Simple machines
Pasteur's postulate
27. Harder - denser - have higher melting points & are chemically active.
Newton's 3rd law motion
Excited electrons
Atomic number
Alkaline earth metals are
28. Excess energy is released into the environment
Direct Variations
true of hurricanes but not of tornadoes
Exothermic
Dynamics
29. Used in electrical devices that have to function at temperatures too high for metals.
Semi - conductors
Nuclear energy
Isotopes
Thermal equilibrium
30. Pressure is measures in a unit called
Pascal
The presence of cells in the sample
Chromatography
Kinetic Friction
31. The interference that occurs when two waves combine to make a wave with a smaller amplitude
Specific gravity
Destructive interference
Conduction
Density
32. The speed of light changes in different materials this is due to__
sulfhydryl group (Functional Group)
Refraction
Heat Fusion
The higher the voltage
33. 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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34. A Compound breaks down into 2 or more simpler substances EX. AB -> A+B
Decomposition reaction
The intensity of sound is measured in
Heat Fusion
Group 1 on the periodic table are all
35. An isotope has a different number of...
Neutrons
Double replacement Reactions
Atomic mass
Work
36. Formed when one or more electrons are transferred from one atom to another. Transfer of electrons happens when metals & non - metals bond.
Seismographs
Mass
Ionic Bonds
The higher the voltage
37. The amount of heat it takes to change a solid to a liquid
Latent heat
Straight line motion
Black
Weak Electrolytes
38. The ability of the material to oppose the flow of electrons through it all
Entropy
Convection
Resistance
The intensity of sound is measured in
39. A free element replaces an element that is a part of a compound. Ex. A +BX -> AX + B
Calorimeter
Rubbing
Archimedes principle
Single replacement reaction
40. Electronic equipment that provides visual images of varying electrical quantities - Useful in studying waves b/c it gives a picture of the wave.
Heat Fusion
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?
oscilloscope
chemically active
41. Is an atom that has all of its electrons in the lowest possible energy levels
Refraction
Milli
Stable electron arrangement
Work
42. 1. Like charges repel one another - 2. Opposite charges attract each other - 3. charge is considered a neutral object has no net charge.
Covalent Bonds
Electricity charged objects share these characteristics (3)
chemically active
Mass
43. A nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy
Seismographs
Protons
newtons first law of motion
Nuclear fission
44. Objects are in thermal contact if they can affect each others temperature
Thermal contact
Boyles law states
Bernoulli principle
Stable electron arrangement
45. 2 or more substances combine to form a compound EX. A+B -> AB
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?
Gay - Lussac's Law
The electromagnetic spectrum
Composition reaction
46. The process of heat transfer via solid contact
Deci
Hydrophobic
Heat conduction
electroscope
47. Energy is added to a system one of two things must happen either thermal energy must increase or work must be done.
Some characteristics of crystals
Valence electrons
Laws of thermodynamic / Laws of conservation
Push & Pull
48. The mechanical energy that a body has by virtue of its position Ex. Stored energy -
2nd law of thermodynamics
Two types of wave interference are (sound related)
potential energy
Black
49. Removal of static electricity by conduction
Grounding Charge
Convection
Chemical properties of metalliods
Covalent Bonds
50. Measure of the disorder or randomness of the particles that make of a system (measurement of movement of particles in a spontaneous reaction) EX. entropy increases as matter and energy in the universe degrade to an ultimate state of inert uniformity.
Entropy
Kinetic Friction
Radiation
Catalysts