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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 object is further than one focal length from the lens
A converging lens produces a real image when
chemically active
Longitudinal Waves
Spectrophotometry
2. What are the # of protons in the nucleus of an atom called?
Silicon
Atomic number
Phosphate group
Mass
3. A nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy
Deci
Nuclear fission
Ampmeter
Resistance
4. Friction opposes the motion of one surface past another - Friction is common when slowing down a car or sledding down a hill.
Compound machines
Rubbing
Kilo - calorie
Newton's 3rd law motion
5. Is the change from liquid to gas.
Evaporation
Inside the nucleus
same
Types of Friction & Resistance
6. Is the transfer of energy by waves such as the electromagnetic waves emitted by stars the sun warms the earth by emitting radiant energy.
Radiation
Charles law
Milli
Evaporation
7. It is the first element in group 13 - is a poor conductor of electricity at low temperature - however if temperature increases it will become a good conductor.
Group 1 on the periodic table are all
Push & Pull
Heat latent
Boron
8. 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)
Water
Nuclear energy
Push & Pull
At the bottom of the meniscus curve
9. Reduction in pressure of a fluid resulting from the speed increase as fluids are forced to flow faster through narrow spaces
Fahrenheit
Venturi effect
Endothermic
Insulin
10. Describes the force of friction of 2 surfaces in contact with eachother . When there is relative motion between the surface.
Electricity charged objects share these characteristics (3)
Atomic mass
Kinetic Friction
sulfhydryl group (Functional Group)
11. An electric circut with a single path
Dynamics
Series circut
Hydrocarbons
Two types of wave interference are (sound related)
12. Current is measured with a device called...
Rubbing
Forces on objects at rest
Physical properties of Meralliods
Ampmeter
13. Measure of the earth's pull
Compound machines
Non - metal
Weak Electrolytes
Weight
14. Temporary magnets that lose their magnetism when electric current is removed
Electromagnets
Seismographs
Kilo
Condensation
15. An isotope has a different number of...
Insulator
Corona
Neutrons
An electromagnet can be made more powerful in 3 ways
16. Average mass of various isotopes of the element.
potential energy
Milli
Atomic mass
Push & Pull
17. 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.
Hydroxyl group ( Functional group)
Thermal contact
Mass number
Buret
18. Are small positively charged particles
During ____ elements change into other elements change into other elements called _____ elements.
Neutrons
Protons
Carbonyl Group (Functional Group)
19. Elements in the middle of the periodic table - in groups 3-12.
Transition elements
Parallel Circut
Newtons 2nd law of motion
Inside the nucleus
20. 1000x the base unit
Kilo
Nucleus
Valence electrons
Venturi effect
21. Force of attraction that holds atoms together - when atoms are bonded chemically they give up their individual properties.
Chemical bond
Force
Weight
Types of kinetic energy?
22. '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
Louis Pasteur
newtons first law of motion
Neutrons
Ampmeter
23. A functional group consisting of a phosphorus atom covalently bonded to four oxygen atoms. Ideal for energy transfer reactions (ATP).
Phosphate group
Forces on a moving object
Electromagnets
Destructive interference
24. Solutes that have bonds; no electrically charged species are created when they dissolve in water; glucose; lipids; urea
Corona
Non - electrolytes
Heat conduction
Series circut
25. Rotate at very high speed in order to separate the liquids from the solids. The more dense part of the solution will sediment at the bottom of the test tube. while the lighter material will stay on top. Ex. centrifuge is used to separate blood from b
An electromagnet can be made more powerful in 3 ways
Weak Electrolytes
Centrifuge
Heat is transferred in 3 ways
26. A wave in which the particles of the medium move perpendicularly to the direction the wave is traveling
Volume
Transverse Waves
Decomposition reaction
Some substances have no noticeable odor because these substances
27. The theory that all matter is composed of particles (atoms and molecules) moving constantly in random directions
Kinetic Molecular theory
Volume
Nuclear fission
Parallel Circut
28. A gelatinous sample of material from a previously unexplored marine environment is thought to be living or to be composed of recently living material. Which of the following would most clearly confirm that the material has a biological origin?
maximum number of electrons that an atom holds with one energy level
The presence of cells in the sample
The tilt of the Earth's axis of rotation relative to the ecliptic
Phosphate group
29. Heat absorbed or radiated during a change of phase at a constant temperature and pressure - the amount of heat required to undergo a phase change
Latent heat
Law of momentum conservation
Evaporation
Seismographs
30. The amount of energy required to change a substance from the solid phase to the liquid phase at its melting point
Parallel Circut
Force
electrostatics
Heat Fusion
31. Electrons that can accept energy from outside sources and move farther away from the nucleus
Load & switch
Excited electrons
Condensation
Straight line motion
32. The agent most widely and most consistently at work changing the appearance of the Earth's surface
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?
Water
sulfhydryl group (Functional Group)
64.0 grams
33. The volume of a gas is directly proportional to the temperature of a gas
The intensity of sound is measured in
64.0 grams
Charles law
Alkaline earth metals are
34. Decibels
Non - metals
The intensity of sound is measured in
The tilt of the Earth's axis of rotation relative to the ecliptic
Heat latent
35. 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)
Decomposition reaction
Pasteur's postulate
36. Specific gravity is the ratio based on...
Carbonyl Group (Functional Group)
Mole
Single replacement reaction
Density
37. Submarines - diving weighting system - naval architecture - Flotation - Buoyancy compensator
Pitch
Forces on a moving object
Applications of Archimedes principle
Corona
38. The amount of energy required for the liquid at its boiling point to become a gas
Density
Heat vaporization
Eyeglasses are ____ so the image will hit the retina
Transverse Waves
39. 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.
Destructive interference
Thermal contact
Applications of Archimedes principle
Electrophoresis
40. Nuclear fission - Nuclear Fusion
Noble gasses
same
Black
types of nuclear reactions?
41. 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
Chemical reactions
Non - metal
Grounding Charge
42. Solid has a definite shape and volume - Liquid has definite volume - but no shape - Gas has no shape of volume.
conducted more easily
Electrophoresis
Hecto
Phases of matter
43. The interference that occurs when two waves combine to make a wave with a larger amplitude
Transverse Waves
Conduction
Constructive interference
Length
44. (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
Mass
The electromagnetic spectrum
Water
45. What quantity of oxygen - O2 - contains very nearly the same number of molecules as 36.0 grams of water - H2O?
Valence electrons
64.0 grams
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?
Ions are
46. # of protons + # of neutrons
Mass number
Newton's 3rd law motion
Nucleus
Pitch
47. Have properties in between metals and non - metals found in groups 13-16
Chordates
The tilt of the Earth's axis of rotation relative to the ecliptic
3rd law of thermodynamics
Metalloids
48. The sum of the protons and neutrons
Mass
the mass number of an atom
Black
Alkali metals are
49. A temperature scale with the freezing point of water 32 degrees and the boiling point of 212 degrees.
Resistance
Fahrenheit
Direct Variations
Sonar technology
50. Measures the amount of matter in an object
Straight line motion
Corona
Mass
Radiation