| A | B |
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| __________ is the rate at which an objects velocity changes. | Acceleration |
| An objects __________ can be determined by dividing the distance traveled by the time taken to travel that distance. | Average Speed |
| When you state both an objects speed and direction you are describing an objects __________. | Velocity |
| The sum of all of the forces acting on an object is called the __________. | Net Force |
| __________ states that an object will remain at rest unless acted on by an outside force. | Newton's first law of motion |
| __________ states that the net force of an object is the product of its acceleration and its mass. | Newton's second law of motion |
| __________ states that every time there is an action force there is an equal and opposite reaction force. | Newton's third law of motion |
| __________ is a force that one surface exerts on another when the rub against each other. | Friction |
| __________ is the measure of the force of gravity on an object. | Weight |
| __________ is the measure of the amount of matter that an object contains. | Mass |
| The __________ of an object is the product of its mass and velocity. | Momentum |
| A __________ is pulled by gravity towards the earth and it stays in orbit because the earth curves at the same rate that it falls. | Satellite |
| __________ in a fluid decreases with altitude and increases with depth. | Pressure |
| The upward force on an object submerged in a fluid is called the __________. | Buoyant Force |
| __________ is done on an object when a force causes the object to move some distance. | Work |
| A __________ makes work easier by changing the direction or amount of force needed to do a task. | Machine |
| __________ is the ability to do work or produce change. | Energy |
| __________ is the energy an object has because of its motion. | Kinetic Energy |
| __________ is energy that is stored or held in readiness. | Potential energy |
| According to the __________, no energy can be created or destroyed. | Law of conservation of energy |
| __________ is potential energy stored in chemical bonds that hold chemical compounds together. | Chemical energy |
| __________ is the measure of the average kinetic energy of an object. | Temperature |
| Three temperature scales are __________. | Celsius, Kelvin, and Fahrenheit |
| The __________ occurs by conduction, convection, and radiation. | Transfer of heat |
| Matter can exist in 3 states: __________. | Solid, liquid, and gas |
| In general, __________ when it is heated and contracts when it is cooled. | Matter expands |
| A __________ is a disturbance that transfers energy from place to place. | Wave |
| __________ is a disturbance that travels through matter as a longitudinal wave. | Sound |
| __________ of sound is measured in decibels. | Loudness |
| The __________ of a sound is a description of how high or low the sound seems to a person. | Pitch |
| The __________ occurs as a source of sound moves towards a listener and has a higher pitch and frequency. | Doppler effect |
| __________ transfers energy by means of changing electric and magnetic fields. | Electromagnetic waves |
| The __________ is made up of radio waves, infrared rays, visible light, ultraviolet rays, X-rays, and gamma rays. | Electromagnetic spectrum |
| The colors in the visible light spectrum are __________. | Red, orange, yellow, green, blue, indigo, and violet |
| Cellular phones transmit and receive signals using __________. | High-frequency radio waves. |
| The __________ of a wave is a measure of how much a particle in the medium moves as it vibrates. | Amplitude |
| You see most objects because light __________, or bounces off of them. | Reflects |
| As pigments of color are added together, fewer colors of light are reflected and more are __________. | Absorbed |
| __________ has a light energy sensitive coating. | Photography film |
| When light rays enter a new medium at an angle, the change in speed of the light causes the light to __________ (bend). | Refract |
| __________ that are alike repel and __________ that are opposite attract each other. | Magnetic poles |
| __________ are a region around a magnet in which the magnetic attraction acts. | Magnetic fields |
| The Earth's __________ are not exactly located at the geographic poles. | Magnetic poles |
| __________ is electrical charges placed in motion when voltage is applied to a circuit. | Electricity |
| An electric current flows through a continuous loop known as a __________. | Circuit |
| __________ allow electrical current to flow freely. | Conductors |
| __________ do not allow electrical current to flow freely. | Insulators |
| __________ is the opposition to the movement of charges flowing through a material. | Resistance |
| __________ results when electrons move from one object to another. | Static Electricity |
| __________ is the potential difference between to places in a circuit. | Voltage |
| A __________ us a circuit in which charges have only one path to flow through. | Series circuit |
| A __________ is a circuit that contains different branches through which charges can flow. | Parallel circuit |
| Fuses, circuit breakers, and grounded plugs are all important __________ found in electrical circuits. | Electrical safety devices |
| Electrical current that flows in one direction is called __________. | Direct current |
| Electrical current that reverses its direction is called __________. | Alternating current |
| A __________ converts mechanical energy into electrical energy. | Generator |
| An __________ converts electrical energy into mechanical energy. | Electric motor |
| __________ makes up everything in the universe. | Matter |
| __________ of a substance can be used to identify the substance. | Properties |
| When __________ occur, one or more new substances are formed. | Chemical changes |
| __________ are pure substances that cannot be broken down in other substances. | Elements |
| __________ is how much space an object takes up. | Volume |
| __________ is an objects mass divided by its volume. | Density |
| Extremely small particles from which all elements are made are called __________. | Atoms |
| A __________ is a group of atoms joined together that act as a single unit. | Molecule |
| __________ have a definite shape and volume because the particles are packed tightly together. | Solids |
| __________ have no definite shape but do have definite volume. | Liquids |
| A __________ has no definite volume nor a definite shape. The particles spread apart to fill all the space. | Gas |
| __________ of matter include the following: Freezing, melting, boiling, evaporating, vaporizing, condensing, and sublimating. | Physical changes |
| An __________ can be determined by its location on the periodic table of the elements. | Elements properties |
| An __________ is made up of electrons, protons, and neutrons. | Atom |
| The __________ of an atom contains the protons and neutrons and is held together by nuclear forces. | Nucleus |
| The __________ is a chart of the elements showing the repeating pattern of their properties. | Periodic table |
| Most of the elements are __________. | Metals |
| Different elements on the periodic table were produced by __________ reactions occurring on stars. | Nuclear fusion |
| The element with one proton, one electron, and one electron is called __________. | Hydrogen |
| The element of living organisms is __________ with 6 protons, 6 neutrons, and 6 electrons. | Carbon |
| Color change, production of a gas, production of a solid, change in temperature are all indications of a __________. | Chemical change |
| The __________ shows the three things necessary to start a fire and keep it burning: fuel, oxygen, and heat. | Fire triangle |
| __________ form when atoms become charged after losing or gaining an electron. | Ions |
| __________ form when electrons are shared. | Covalent bonds |
| __________ tastes sour, turns litmus red, and forms hydrogen ions (H+) when dissolved in water. | Acids |
| __________ tastes bitter, turns litmus blue, and forms hydroxide ions (OH-) when dissolved in water. | Base |
| The __________ measures the acid and base level of a solution. | pH |
| __________ is the study of stars, moons, and other objects in space. | Astronomy |
| The earth has __________ because its axis is tilted at 23.5 degrees as it revolves around the sun. | Seasons |
| The earth's __________ on its axis causes day and night. | Rotation |
| __________ occur mainly because of differences in how much the moon pulls on different parts of the Earth. | Tides |
| Mercury, Venus, Earth, and Mars are the four inner planets. They are small and have rocky surfaces and are often called the __________. | Terrestrial planets |
| The 4 main outer planets, Jupiter, Saturn, Uranus, and Neptune are much larger than Earth, made mostly of gas and are called the __________. | Gas giants |
| __________ are chunks of ice and dust that have long, elliptical orbits. | Comets |
| Most __________ are objects that revolve around the sun between the orbits of Mars and Jupiter. | Asteroids |
| __________ are spinning of clouds of gases that radiate heat and light through nuclear fusion reactions. | Stars |
| According to the __________, the universe formed in an enormous explosion about 10 to 15 billion years ago. | Big bang theory |
| Patterns of stars in the sky , sometimes having stories told of their patterns, are called __________. | Constellations |
| Our planet earth is located in our solar system which is located in the __________. | Milky Way Galaxy |
| When you are making a prediction, or guess, about the outcome of an experiment you are making a scientific __________. | Hypothesis |
| A __________ is a factor in an experiment that can change. | Variable |
| The standard of measurement used by scientists around the world is the __________. | Metric system |
| Patterns with numbers often become clearer if you organize your data in a __________. | Table or graph |
