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* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
The ability to do work (move an object over a distance) or cause a change is _____. energy The unit for measuring energy is _____. joules The energy of motion is called Kinetic energy Name 3 types of potential energy. Chemical potential energy Gravitational potential energy Elastic potential energy Name 6 forms of energy. Chemical Nuclear Electromagnetic Electrical Mechanical Thermal (Heat) Energy cannot be created or destroyed; it can be converted from one form to another is known as the _____. Law of Conservation of Energy When energy is transferred from one form to another, what form of energy is lost to the environment? Thermal (Heat) List the four phases of matter in order of least energetic molecules to most energetic molecules. Solid Liquid Gas plasma The total energy of all the particles in a substance is ____. Thermal energy The average kinetic energy of the particles in a substance is ____. temperature In what direction does thermal energy move? From objects of warmer temperature to objects of cooler temperature Name 3 methods of heat transfer. Conduction Convection Radiation The distance a wave travels in a certain amount of time is the _____. speed All electromagnetic waves have the same _____. speed Which electromagnetic waves have the longest wavelengths and the lowest frequencies? radio Electromagnetic waves can transfer energy without a _____. medium The range of electromagnetic waves placed in a certain order is called the _____. electromagnetic spectrum When a police officer uses radar for speed control, the officer is using what kind of electromagnetic waves? radio waves (more specifically – microwaves) Visible light has a higher frequency than ____. radio waves, microwaves and infrared rays Clear glass, water and air are examples of what kind of material? transparent A material that reflects or absorbs any light that strikes it is _____. opaque What happens when parallel rays of light hit a smooth surface? regular reflection Frosted glass and wax paper are translucent When the surface of a mirror curves inward, like the inside of a bowl, it is called a _____. concave What happens to the speed when light passes from air into water? It slows down. What happens to white light when it strikes a black object? All the light is absorbed. None is reflected. Name the primary colors of light. red, green, blue Any two primary colors of light combined in equal amounts produce _____. secondary colors A curved piece of glass or other transparent material that is used to refract light is called a lens What type of electromagnetic waves cause sunburn? ultraviolet The type of radio waves with the shortest wavelengths and the highest frequencies are called__. microwaves The part of the electromagnetic spectrum you can see is called _____ light. visible An opaque object has a particular color because it reflects some wavelengths of light and _____ the rest. absorbs _____ _____ occurs when parallel rays of light hit and bounce off a bumpy, or uneven, surface. Diffuse reflection The type of electromagnetic wave used to make images of bones inside the human body _____. X-rays Electromagnetic waves are classified as _____ waves. transverse Electromagnetic waves with the longest wavelengths are _____. radio Put the electromagnetic spectrum in order from longest to shortest wavelength. Radio waves, microwaves, infrared waves, visible light, ultraviolet, x-rays, gamma rays Electromagnetic waves that have wavelengths slightly shorter than those of visible light are called _____. ultraviolet A _____ lens is thicker in the center than at its edges. Convex Name the type of wave that has the highest frequency. Gamma rays Name the primary colors of pigment. Cyan, magenta and yellow When the primary colors of pigments are added together in equal amounts, the resulting color is _____. black What is a medium? A solid, liquid, or gas Can sound travel through outer space? No way! What type of wave does sound travel as? longitudinal You can hear sounds from around corners because of _____. diffraction The ability of a material to bounce back after being disturbed is called _____. elasticity Which will sound waves will travel fastest through—very elastic or not very elastic materials? Very elastic! Which will sound waves travel fastest through—more dense or less dense materials? Less dense! Which will sound waves will travel fastest through—warmer air or cooler air? Warmer air! Loudness, or sound level, is measured in units called _____. Decibels (dB) Sound waves with frequencies above the normal human range of hearing are called _____. Ultrasound The amount of energy a sound wave carries per second through a unit area is its _____. Intensity The pitch of a sound that you hear depends on the sound wave’s _____. Frequency The changing pitch of a police car’s siren as it moves by you is an example of _____. The Doppler effect Which term refers to how high or low a sound seems to a person? Pitch As a sound source moves toward a listener, what happens to the pitch? Appears to increase How well sounds can be heard in a particular room or hall is described by _____. Acoustics A system of detecting reflected sound waves is _____. SONAR What does SONAR stand for? SOund Navigation And Ranging Sound waves with frequencies above 20,000 Hz are called _____. Ultrasound Infrasound waves have what frequencies? Below 20 Hz What do bats use to locate food and to navigate? Echolocation A sonic _____ is a huge amount of energy released in the form of a shock wave. boom The repeating changes in loudness of two sound waves that are interfering are called _____. beats The _____ of a sound wave is the distance between a compression or rarefaction and the next compression or rarefaction. wavelength Sound travels the slowest through this medium: _____. air The “pile up” of sound waves as a vehicle travels almost as fast as the speed of sound is called (the) _____. Sound barrier True or False. Newton’s first law of motion applies to both moving and nonmoving objects. True According to Newton’s second law of motion, with force constant, if mass goes up acceleration _____. Goes down True or False. Weight is a force. True True or False. Weight is a scalar quantity. False The acceleration due to gravity on Earth is 9.8 m/s2 The acceleration due to gravity is 9.8 m/s2. After falling 5 seconds, an object would have a velocity of _____ 49 m/s, downward The weight of an object varies with the _____. The force of gravity When forces applied to an object are balanced, what happens to the motion of the object _____? No change Forces that are equal in strength and opposite in direction are called _____ forces. balanced The tendency of matter to resist a change in motion is called _____. inertia Which would have more inertia—a kilogram of feathers or a kilogram of iron? The have the same amount of inertia Which would have more inertia—a motorcycle or a full-size pick up truck? truck What kind of force always causes a change in motion? unbalanced How hard objects are pressed together and the type of surface that objects slide across determines the amount of _____ friction Rank the types of friction based on the least amount to the highest amount. Fluid, rolling, sliding Liquids and gases are called _____. Fluids When air resistance equals the force of gravity on a falling object, the object reaches _____. Terminal velocity The force that opposes motion is _____. friction Fluid friction that opposes the force of weight in a falling object is called _____. Air resistance A downhill skier experiences _____ friction. sliding A falling leaf is an example of ____ friction. fluid According to Newton’s Second Law of Motion, if the force exerted on an object increases, so will the ____. acceleration According to Newton’s Universal Law of Gravitation, the amount of the gravitational force between two objects depends on the _____ and _____ the objects. Mass and distance between If two stars move farther apart, the force of gravity between them will _____. decrease Because it has both magnitude and direction, a force is a _____ quantity. vector Calculating With what force will a car hit a tree if the car has a mass of 3500 kg and it’s accelerating at a rate of 4 m/s2? 14,000 N (kg m/s2) Calculating What is the mass of a falling rock if it hits the ground with a force of 490 N? 50 kg Calculating What is the weight of a 82 kg man? 803.6 N (kg m/s2) Calculating A skydiver with a weight of 775 N reaches terminal velocity. What is the force of air resistance acting on the skydiver? 775N (kg m/s2) What type of force occurs when an object from the external world touches a system and thereby exerts a force on it? contact Forces exerted without contact or at a distance, for example gravity, are called ___ forces. field The only force exerted on an object in free fall is _____. gravity What is it called when an object is moving both horizontally and vertically? Projectile motion voltage battery longer series They are not reusable series 1000 volts prevent an overload in the circuit Direct current the strength of the static force would decrease Static Electricity attract ohms the current will decrease The electron flow goes around the load so that it doesn’t work. voltage repel each other 10 ohms alternating chemical reaction 2.4 amps