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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. Shiny - softer & less dense. Mostly chemically active
Phases of matter
Alkali metals are
Convection
Charles law
2. 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?
64.0 grams
Black
Isotopes
sulfhydryl group (Functional Group)
3. 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.
Push & Pull
Nuclear energy
Hydrophobic
Radiation
4. 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
As the train approaches and blasts its whistle - the whistle sounds..
Density
Centrifuge
Chemical reactions
5. 1. nuclear reaction 2. radioactive
Kinetic Molecular theory
Nuclear energy
During ____ elements change into other elements change into other elements called _____ elements.
Non - metal
6. Non - metals - group 18 - the most non - reactive elements
Laws of thermodynamic / Laws of conservation
Noble gasses
Kilo - calorie
Alkali metals are
7. Is the study of the relationship between motion & the forces affecting motion.
Pasteur's postulate
Atomic number
Dynamics
Non - metal
8. A mixture containing two or more metallic elements or metallic and nonmetallic elements usually fused together or dissolving into each other when molten Ex. Brass is an alloy of zinc and copper
Simple machines
Types of potential energy?
Kilo - calorie
alloy
9. Gram is the base unit of...
Isotopes
Mass
Constructive interference
maximum number of electrons that an atom holds with one energy level
10. A free element replaces an element that is a part of a compound. Ex. A +BX -> AX + B
Single replacement reaction
Thermal equilibrium
Nuclear energy
Black
11. 2 or more substances combine to form a compound EX. A+B -> AB
Composition reaction
Endothermic
Eyeglasses are ____ so the image will hit the retina
Neutrons
12. The process of heat transfer via solid contact
Volume
Heat conduction
Deca
Heat Fusion
13. 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.
Inside the nucleus
Group 1 on the periodic table are all
Thermal equilibrium
Metalloids
14. 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
Fahrenheit
Sonar technology
Specific gravity
Types of potential energy?
15. Two or more simple machines working together EX. wheelbarrow it uses level - wheel & axle.
Static friction
Compound machines
Ionic Bonds
Convection
16. Change in the apparent frequency of a wave as observer and source move toward or away from each other
Types of potential energy?
Longitudinal Waves
newtons first law of motion
Doppler effect
17. Is the measure of energy temperature is a measure of the heat in an object.
Electrophoresis
Single replacement reaction
Heat
Neutrons
18. Potential & Kinetic
Atomic number
What are the 2 most common encountered forms of energy are
Spectrophotometry
Ampmeter
19. Animals in which of the following groups may have a backbone and a spinal cord?
Chordates
Force
Alkaline earth metals are
Pascal
20. The total entropy of a system plus that of its surroundings always increase.
Celsius
2nd law of thermodynamics
Mass
Applications of Archimedes principle
21. Electrons that can accept energy from outside sources and move farther away from the nucleus
Law of momentum conservation
Heat vaporization
Excited electrons
Pitch
22. 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?
alloy
The intensity of sound is measured in
Linear acceleration
circut types
23. 100x the base unit
Boron
Non - metals
What are the 2 most common encountered forms of energy are
Hecto
24. 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
Carbon Dioxide
Mass
First law of thermodynamics
Insulator
25. Excess energy is released into the environment
Exothermic
Kinetic Friction
chemically active
Specific gravity
26. The transfer of heat by electromagnetic waves is called?
Decomposition reaction
Valence electrons
Some Uses of electricity
Radiation
27. # of electrons. Non - metals have 4-8 electrons in their outermost energy.
Volume
Heat latent
Difference between metals & non - metals
Calorie
28. The speed of light changes in different materials this is due to__
Destructive interference
Inside the nucleus
Water
Refraction
29. Used in electrical devices that have to function at temperatures too high for metals.
types of nuclear reactions?
Semi - conductors
Potential difference
3rd law of thermodynamics
30. Clustered regions of aligned magnetic atoms. When these regions are aligned with one another - the substance containing them is a magnet.
Noble gasses
Metalloids
Magnetic domains
Straight line motion
31. What quantity of oxygen - O2 - contains very nearly the same number of molecules as 36.0 grams of water - H2O?
electroscope
64.0 grams
OHMS
3rd law of thermodynamics
32. It scatters light in many directions
Compound machines
Contains ions
newtons first law of motion
When a light hits a rough surface
33. Uses the transfer of heat from one substance to another to determine the specific heat of the substance.
Phases of matter
Inertia & circular motion
Chromatography
Calorimeter
34. The volume of a gas is directly proportional to the temperature of a gas
Forces on objects at rest
Charles law
electrostatics
Nuclear reaction
35. Nuclear fission - Nuclear Fusion
Heat vaporization
Pitch
Thermal contact
types of nuclear reactions?
36. Lacking affinity for water. Repels water. Non - polar
Density
Hydrophobic
Series circut
Straight line motion
37. 1. Make more coils - 2. put an iron cover (nail) inside the coils - use more battery power
First law of thermodynamics
Mass
An electromagnet can be made more powerful in 3 ways
Milli
38. It is second element in group 14 - semi - conductor. Sand is made of silicon - it is also used to manufacture glass and cement.
Phosphate group
Silicon
Rubbing
Magnetic domains
39. Are small positively charged particles
Entropy
Gay - Lussac's Law
Protons
Chemical bond
40. The device (bell or Build) is an example of a load. A load is a device that uses energy.
Forces on a moving object
Nuclear reaction
Load & switch
Silicon
41. Pressure is measures in a unit called
Inside the nucleus
electrostatics
Pascal
Heat Fusion
42. The center of the atom.
Nucleus
Nuclear reaction
Chemical bond
Seismographs
43. Inclined plane - lever - wheel & axle - pulley.
Chordates
Atomic mass
An electromagnet can be made more powerful in 3 ways
Simple machines
44. Elements in the middle of the periodic table - in groups 3-12.
electrostatics
circut types
types of particles in the nucleus?
Transition elements
45. 1000x the base unit
Spectrophotometry
circut types
Kilo
Circut
46. 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.
Newton's 3rd law motion
Corona
Phases of matter
Electrophoresis
47. The principle of conservation of energy: Energy can be transferred and transformed - but it cannot be created or destroyed.
Eyeglasses are ____ so the image will hit the retina
Forces on a moving object
First law of thermodynamics
Radiation
48. The mechanical energy that a body has by virtue of its motion - energy of a moving object.
Calorimeter
Phosphate group
Milli
Kinetic energy
49. Harder - denser - have higher melting points & are chemically active.
Mass
Boron
Alkaline earth metals are
isotopes of each other
50. A Compound breaks down into 2 or more simpler substances EX. AB -> A+B
Circut
Decomposition reaction
Phosphate group
Forces on objects at rest