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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. 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.
types of particles in the nucleus?
newtons first law of motion
Compound machines
Thermal equilibrium
2. Experiments may not be done on...
Bernoulli principle
Exothermic
Two types of wave interference are (sound related)
birds
3. Meter is the base unit of...
Kilo - calorie
electroscope
Length
potential energy
4. (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.
Stable electron arrangement
Heat conduction
Nuclear reaction
Applications of Archimedes principle
5. Record vibrations in earth & allow us to measure earthquake activity.
2nd law of thermodynamics
Contains ions
Noble gasses
Seismographs
6. 1.) Protons 2.) Neutrons - They both have the same mass - but neutrons have no mass.
Non - metal
Energy
types of particles in the nucleus?
Protons
7. The principle of conservation of energy: Energy can be transferred and transformed - but it cannot be created or destroyed.
Magnetic field
Entropy
First law of thermodynamics
birds
8. Submarines - diving weighting system - naval architecture - Flotation - Buoyancy compensator
Applications of Archimedes principle
Simple machines
Kinetic Friction
chemically active
9. 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
Inside the nucleus
sulfhydryl group (Functional Group)
Carbon Dioxide
Forces on a moving object
10. Is formed when 2 atoms share electrons - covalent bonding happens among non - metals.
Nuclear energy
A converging lens produces a real image when
Neutrons
Covalent Bonds
11. Inclined plane - lever - wheel & axle - pulley.
chemically active
Conduction
Simple machines
Pasteur's postulate
12. Way of keeping tract of valence electrons
Mole
circut types
Lewis dot structures
Heat conduction
13. Nuclear fission - Nuclear Fusion
Insulator
circut types
potential energy
types of nuclear reactions?
14. The number of electrons per second that flow past a point in a circut.
Forces on a moving object
birds
Current
Heat latent
15. The amount of energy required for the liquid at its boiling point to become a gas
Some Uses of electricity
Radiation
Compound machines
Heat vaporization
16. All processes cease when temperature approaches 0.
isotopes of each other
Non - metals
Gay - Lussac's Law
3rd law of thermodynamics
17. Have properties in between metals and non - metals found in groups 13-16
Load & switch
Metalloids
The presence of cells in the sample
Insulator
18. The theory that all matter is composed of particles (atoms and molecules) moving constantly in random directions
Kinetic Molecular theory
Heat transfer
The tilt of the Earth's axis of rotation relative to the ecliptic
Refraction
19. Not as easy to recognize as metal bc they do not always share physical properties. They are dull - brittle - & not good conductors of heat
birds
Non - metal
Load & switch
Newtons 2nd law of motion
20. Is a simple device used to indicate the existence of a positive or negative charge.
electroscope
Hydroxyl group ( Functional group)
Chemical properties of metalliods
An electromagnet can be made more powerful in 3 ways
21. Number of protons
Thermal equilibrium
Specific gravity
Atomic number
Applications of Archimedes principle
22. 1. Make more coils - 2. put an iron cover (nail) inside the coils - use more battery power
Grounding Charge
Celsius
Atomic number
An electromagnet can be made more powerful in 3 ways
23. Alkali Metals are the most _____________
Density
Atom
chemically active
Electrons
24. Inertia is the tendency of any object to resist change in motion. An object at rest tends to stay at rest. An object that is moving tends to keep moving.
Static friction
the mass number of an atom
Thermal contact
Forces on a moving object
25. A free element replaces an element that is a part of a compound. Ex. A +BX -> AX + B
Deci
Series circut
Single replacement reaction
Gay - Lussac's Law
26. Organic molecules that are composed of only carbon and hydrogen.
Sonar technology
Hydrocarbons
Non - electrolytes
chemically active
27. Static friction - Kinetic friction - Push & pull - rubbing - pull of gravity - forces on objects at rest - forces on a moving object - inertia & circular motion.
birds
Longitudinal Waves
Calorie
Types of Friction & Resistance
28. 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
Applications of Archimedes principle
Ions are
Chromatography
Specific gravity
29. Clustered regions of aligned magnetic atoms. When these regions are aligned with one another - the substance containing them is a magnet.
newtons first law of motion
Compound machines
Direct Variations
Magnetic domains
30. 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 -
Some Uses of electricity
Heat latent
Inertia & circular motion
Neutrons
31. It is second element in group 14 - semi - conductor. Sand is made of silicon - it is also used to manufacture glass and cement.
Heat Fusion
Spectrophotometry
electrostatics
Silicon
32. They form only over warm oceans
true of hurricanes but not of tornadoes
Specific gravity
Newtons 2nd law of motion
Double replacement Reactions
33. Current is measured with a device called...
Compound machines
Current
Ampmeter
Contains ions
34. The Earth's seasons can be attributed primarily to which of the following in conjunction with its revolution about the Sun?
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35. 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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36. A wave in which the particles of the medium move perpendicularly to the direction the wave is traveling
On the periodic table which elements are grouped by color
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?
Transverse Waves
37. 1. Constructive 2. Destructive
Two types of wave interference are (sound related)
Insulin
types of nuclear reactions?
Carbon Dioxide
38. 1. nuclear reaction 2. radioactive
Evaporation
Crystals is a regular repeating Arrangement of atoms - ions - or molecules. They are well Organized structures. The 2 kinds of structures are:
Potential energy
During ____ elements change into other elements change into other elements called _____ elements.
39. The centripetal force is provided by the high banking of the curved road & by friction between the wheels & the road.
Conduction
Kelvin
Kilo
Inertia & circular motion
40. Is done on an object when an applied force moves across a distance.
Excited electrons
Nuclear fission
Work
Straight line motion
41. Uses electrical charges of molecules to separate them according to their size the molecules such as DNA or proteins - are pulled through a gel towards either the positive end of the gel box.
isotopes of each other
Catalysts
Conduction
Electrophoresis
42. The sum of the protons and neutrons
Noble gasses
the mass number of an atom
Non - metals
Atomic number
43. Describes the force of friction of 2 surfaces that are in contact but do not have any motion relative to eachother.
Types of Friction & Resistance
Nucleus
conducted more easily
Static friction
44. Removal of static electricity by conduction
Grounding Charge
Doppler effect
At the bottom of the meniscus curve
Alkaline earth metals are
45. Causes motion
same
Force
Inertia & circular motion
Ampmeter
46. 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
Push & Pull
64.0 grams
Nuclear Fusion
47. A circut with two or more resistors where the electricity has more than one path to travel
Transition elements
Neutrons
Parallel Circut
Law of momentum conservation
48. Used in electrical devices that have to function at temperatures too high for metals.
Semi - conductors
Non - electrolytes
chemically active
3rd law of thermodynamics
49. Heat transferred by direct contact
Conduction
Parallel Circut
Chordates
The intensity of sound is measured in
50. Resistance is measured in...
the mass number of an atom
Atomic mass
Laws of thermodynamic / Laws of conservation
OHMS