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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. Excess energy is released into the environment
Halogens
Archimedes principle
Exothermic
Kilo
2. Uses sound waves to locate objects and is especially useful underwater the sound waves bounce off the object and are used to assist in location
A converging lens produces a real image when
Refraction
Sonar technology
Some Uses of electricity
3. Electrons in the outermost energy level; they are involved in bond formation
birds
Rubbing
Chemical reactions
Valence electrons
4. Measures the amount of matter in an object
Difference between metals & non - metals
Two types of wave interference are (sound related)
Mass
Mass number
5. The amount of heat it takes to change a solid to a liquid
Energy
What are the 2 most common encountered forms of energy are
Stable electron arrangement
Latent heat
6. Temporary magnets that lose their magnetism when electric current is removed
Heat Fusion
Potential difference
Electromagnets
The electromagnetic spectrum
7. Uses the principles of capillary action to separate substances such as plant pigments molecules of a larger size will migrate up the paper more quickly produce lines of pigment. - a process used for separating mixtures by virtue of differences in abs
Ionic Bonds
Water
Chromatography
Spectrophotometry
8. Friction opposes the motion of one surface past another - Friction is common when slowing down a car or sledding down a hill.
Rubbing
Density
Nuclear reaction
Electrochemistry
9. A circut with two or more resistors where the electricity has more than one path to travel
During ____ elements change into other elements change into other elements called _____ elements.
Atomic mass
Fahrenheit
Parallel Circut
10. The number of electrons per second that flow past a point in a circut.
Kinetic Molecular theory
Current
Forces on objects at rest
Types of Friction & Resistance
11. 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?
Magnetic domains
Ions are
Linear acceleration
Physical properties of Meralliods
12. Relates pressure & temp. and temp and volume.
Push & Pull
Simple machines
Direct Variations
Chromatography
13. That for a fixed amount of gas at a constant temperature - the volume of a gas increases as its pressure decreases
Boyles law states
Straight line motion
Sonar technology
Bernoulli principle
14. Polar molecules
Doppler effect
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?
Hydrophilic
Strong electrolytes
15. The branch of physics that deals with static electricity - study of stationary electric charges.
Black
electrostatics
Kinetic energy
Charles law
16. The volume of a gas is directly proportional to the temperature of a gas
Buret
Hydrocarbons
Charles law
Forces on objects at rest
17. Atoms of the same element that have different numbers of neutrons
Radiation
Density
Isotopes
The higher the voltage
18. Stored mechanical - Nuclear - Chemical - gravitational
Types of potential energy?
Stable electron arrangement
Catalysts
newtons first law of motion
19. (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.
Nuclear reaction
types of nuclear reactions?
Ampmeter
Electricity charged objects share these characteristics (3)
20. A wave in which the particles move parallel to the path of the wave
Louis Pasteur
First law of thermodynamics
Hydrophobic
Longitudinal Waves
21. Mass of the substance contained per unit of volume
Transverse Waves
Evaporation
Density
Nuclear Fusion
22. The mechanical energy that a body has by virtue of its position Ex. Stored energy -
Pitch
potential energy
Nuclear fission
Atomic mass
23. They are neither precise nor accurate.
Corona
potential energy
Compound machines
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?
24. The centripetal force is provided by the high banking of the curved road & by friction between the wheels & the road.
types of nuclear reactions?
Nucleus
Heat
Inertia & circular motion
25. Atoms of the same element that have different numbers of neutrons
Isotopes
Nuclear Fusion
Constructive interference
Thermal equilibrium
26. The theory that all matter is composed of particles (atoms and molecules) moving constantly in random directions
Charles law
Weak Electrolytes
Condensation
Kinetic Molecular theory
27. 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?
Semi - conductors
Water
Longitudinal Waves
Black
28. Substance that dissociates completely into its ions when added to water and conducts electricity well.
Strong electrolytes
Newtons 2nd law of motion
Longitudinal Waves
circut types
29. A free element replaces an element that is a part of a compound. Ex. A +BX -> AX + B
Single replacement reaction
Specific gravity
Laws of thermodynamic / Laws of conservation
Compound machines
30. Way of keeping tract of valence electrons
Lewis dot structures
Physical properties of Meralliods
Celsius
Neutrons
31. '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
The tilt of the Earth's axis of rotation relative to the ecliptic
Excited electrons
Some characteristics of crystals
newtons first law of motion
32. Experiments may not be done on...
Series circut
birds
Neutrons
Thermal equilibrium
33. 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.
Nucleus
Nuclear energy
Longitudinal Waves
Radioactive Particles
34. 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.
Charles law
Convection
birds
Mass
35. The center of the atom.
Mass
Sonar technology
Hecto
Nucleus
36. Heat transferred by fluid current
The tilt of the Earth's axis of rotation relative to the ecliptic
Contains ions
Convection
Group 1 on the periodic table are all
37. The interference that occurs when two waves combine to make a wave with a larger amplitude
maximum number of electrons that an atom holds with one energy level
Buret
Resistance
Constructive interference
38. 1/10 the base unit
Deci
Calorimeter
Charles law
OHMS
39. Record vibrations in earth & allow us to measure earthquake activity.
Rubbing
Semi - conductors
Neutrons
Seismographs
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.
Atomic mass
Semi - conductors
circut types
Potential difference
41. Clustered regions of aligned magnetic atoms. When these regions are aligned with one another - the substance containing them is a magnet.
Circut
Pitch
Insulator
Magnetic domains
42. A material such as glass or porcelain with negligible electrical or thermal conductivity. Electric charges do not move easily - if at all.
Eyeglasses are ____ so the image will hit the retina
Dynamics
electroscope
Insulator
43. Change from gas to liquid
Condensation
Exothermic
Potential energy
Circut
44. Animals in which of the following groups may have a backbone and a spinal cord?
Condensation
Current
Semi - conductors
Chordates
45. The amount of energy required to change a substance from the solid phase to the liquid phase at its melting point
Heat Fusion
Covalent Bonds
Boron
Electromagnets
46. F - branch of chemistry that deals with the chemical action of electricity and the production of electricity by chemical reactions
Compound machines
Electrochemistry
Boron
The presence of cells in the sample
47. 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
Calorie
Work
Carbon Dioxide
The tilt of the Earth's axis of rotation relative to the ecliptic
48. Is a simple device used to indicate the existence of a positive or negative charge.
Milli
electroscope
isotopes of each other
Isotopes
49. 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)
Series circut
64.0 grams
Radiation
50. A functional group consisting of a phosphorus atom covalently bonded to four oxygen atoms. Ideal for energy transfer reactions (ATP).
types of nuclear reactions?
Latent heat
Hydrophobic
Phosphate group