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CSET Physical Science 3

Subjects : cset, 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. Occurs when light travels only in straight lines - An object is visible because light is reflected from the object into our eyes






2. The north pole of one magnet attracts the ___________ of another - but like poles repel each other - Either pole can attract unmagnetized iron objects






3. Top: Output force (resistance) Middle: Input force (effort) End: Fulcrum Examples: baseball bat - fishing pole - shovel






4. A compound and portable inclined plane - A triangular - shaped tool used to separate two objects or portions of an object - lift an object - or hold an object in place - It functions by converting a force applied to its blunt end into forces perpendi






5. The number of waves produced in a given time






6. For smooth surfaces - the angle at which light is incident on the surface equals the angle at which it is reflected






7. Hard matter is ______ with soft matter






8. The mechanical advantage of a wedge is given by the ______________________ - Although a short wedge with a wide angle may do a job faster - it requires more force than a long wedge with a narrow angle






9. Explains why objects appear bent as light passes from one transparent object into another - Light travels at different speeds through different objects (faster through air than through water or glass) - Responsible for rainbows and for the splitting






10. Height of the bounce of an object dropped o the material - related to elasticity






11. Are inclined planes - Can convert a rotational force (torque) to a linear force - and vice versa - The ratio of threading determines the mechanical advantage of the machine - More threading increases the mechanical advantage






12. Some gases can transition directly to a solid Example: the formation of frost






13. Results when electrical charges buildup or increase on the surface of a material - here - there is no current flowing as would be found in electrical outlets - When certain materials are rubbed together - electrons can move from one object to the oth






14. A hypothesis is an attempt to answer the question or predict the outcome - - A hypothesis is a possible explanation for a set of observations






15. The number of protons of that element - No two elements have the same atomic number - Elements in the periodic table are arranged in order of increasing atomic number






16. Heat tends to move from a high - temperature region to a low- temperature region - This heat transfer may occur by the mechanisms of conduction - radiation - and convection






17. Unlike incandescent lamps - fluorescent lamps always require a ______ to regulate the flow of power through the lamp






18. The ability to perform work - _______ transformations result when a change of form takes place - All forms of ________ can be converted into other forms






19. For a homogeneous object - density is determined by dividing the mass by the volume (D = M/V) The mass is normally measured with an appropriate scale or balance - The volume may be measured directly (from the geometry of the object) or by the displac






20. A water - soluble mixture of different dyes extracted from lichens - It is often absorbed onto filter paper






21. The amount of matter in a chemical substance - In everyday usage - is commonly confused with weight






22. Elements with similar properties fall into the same vertical columns on the preriodic table to form _____ - Properties of elements change greatly across any one row (period)






23. A source of electric light that works by incandescence - An electric current passes through a thin filament - heating it until it produces light - The enclosing glass bulb prevents the oxygen in the air from reaching the hot filament - which otherwis






24. Scratch hardness - indentation hardness - and rebound hardness






25. Also generates a magnetic field - demonstrating an intimate connection between electricity and magnetism






26. Anything that has mass and occupies space - Everything you see and touch is composed of matter






27. The top of a wave's 'hill'






28. The earth's __________ orients the iron needles of navigational compasses






29. A first - class lever - In its simplest form it consists of a rod attached to a wheel so that their movements are coupled when one of the parts is turned






30. Displayed by permanent magnets and around electric currents






31. Form a question (state the problem) - A scientific question is one that can be answered on the basis of evidence and that can be measured - The question often asks - 'What effect will something have






32. Atoms are made up of several tiny parts - At the center of an atom is a core called the __________ - which is made up of particles called protons and neutrons






33. Resistance to plastic (permanent) deformation due to a constant load from a sharp object






34. Symbol: H Protons: 1 Neutrons: 0 Mass: 1






35. Lever - Pulley - Inclined plane - Screw - Wedge - Wheel and axle






36. The ratio of the output to the input force - Also called leverage - Results in less force applied over a greater distance - Helps to make work easier






37. These are the factors that are kept exactly the same in an experiment. In an experiment on plant growth - the variables could include amount of sunlight - type of soil - amount of water - and type of plant. Only one factor at a time is changed - whil






38. In optics - refraction occurs when light waves travel from a medium with a given refractive index to a medium with another index Example: A ray of light will refract as it enters and leaves glass - assuming there is a change in the refractive index.






39. The law of inertia - Without outside forces (such as gravity or friction) - an object at rest will remain at rest - while an object in motion will never stop or deviate from its course

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40. Made up of molecules with the composition H20 - One _____ molecule is built from two atoms of hydrogen and one atom of oxygen






41. After a rainstorm - the air is full of tiny drops of water - Each drop acts as a prism - splitting the light into the colors of the spectrum






42. The distance between two consecutive points on a wave (crest to crest)






43. Energy generated from natural sources (such as sunlight - wind - rain - tides - and geothermal heat) which are renewable (naturally replenished)






44. A grooved wheel with a rope or other item wrapped around it - used to change the direction of an applied force - change the amount of force - transmit rotational motion - or realize a mechanical advantage in either a linear or a rotational system of






45. Some of the light is reflected - the angle of reflection being equal to the...






46. Major greenhouse gases






47. Protons have a __________ electrical charge - and neutrons have no charge






48. Characterized by their ability to retain their shape - Relatively incompressible - Melt when heated and vaporize only slightly - All substances become solid if cooled sufficiently Examples: rocks - crystals - wood - feather - ice






49. The burning of coal also contributes to the formation of...






50. The beginning of scientific wisdom - The physicist's first reaction to a new idea is to ask: Can it be measured? Can I describe it with numbers?