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SSA Review - Physics

Physical Science SSA Review

QuestionAnswer
Law of Conservation of Energy Energy can NOT be created or destroyed... but it CAN change forms.
Potential Energy Stored energy
Kinetic Energy Energy of movement
Force A push or a pull on an object
Balanced Force Does NOT change the speed or direction of the object
Unbalanced Force Changes the speed and/or direction of the object in the direction of the stronger force
Law of Gravity The force of attraction between objects. Its strength depends on the mass of the objects and their distance from each other.
Speed (Velocity) Distance divided by time
Mechanical Energy The combined energy of motion (kinetic) and position (potential)
Chemical Energy Energy stored in chemical bonds
Thermal Energy Heat
Sound Energy Vibrations
Radiation Energy that can travel through empty space EX: heat from the sun
Reflection When light bounces off a surface Ex: a mirror
Refraction When light bends as it goes through a material Ex: objects look larger/distorted in water
Absorption When light stops at the object and is not reflected or refracted
Waves How energy moves
Chemical Property A property that involves changing the substance into something else Ex: the ability to rust or burn
Physical Property A property that can be observed without changing the substance
Density Mass divided by Volume
Volume The amount of space an object fills
Mass The amount of matter in an object
Weight The amount of gravity pulling on an object. This can change if you go to another planet.
Chemical Change Changes what a substance IS. Ex: Burning wood turns to ash
Physical Change Changes the appearance of an object, it it is still the same substance. Ex: tearing a piece of paper
Atom The smallest unit of an element
Protons Positive charge, found in the nucleus
Neutron Neutral charge, found in the nucleus
Electron Negative charge, found in the electron cloud
Element One type of atom, represented by each square of the periodic table
Molecule More than one atom joined together
Solid Atoms are tightly packed together. Have constant shape and volume.
Liquid Atoms are more loosely packed. The volume is constant, but the shape can change.
Acid pH of 0-6. Sour taste, react with metals. Ex: citrus juice, vinegar
Base pH of 8-14. Bitter taste, feel slippery. Ex: Soap, ammonia, baking soda
Neutral pH of 7. Ex: water
Homogeneous Mixture substances are combined and can not be easily separated
Heterogeneous Mixture substances can be easily separated
Gas Atoms are spread far apart and move around freely. Can change volume and shape.
Created by: Stszerdy