Energy Energy = ______________________ – Waves carry energy from one place to another – Light and sound both move in Waves

Characteristics of Waves Crest - ____________________ Trough - ____________________ _____________ = distance from crest to crest Amplitude = Height of the wave Frequency = ______________________

Wave Diagram

Light Light - form of energy that travels in waves – light travels in _____________= RAYS – Beam ___________________________________ – Speed of Light = 186,282 miles/ sec

Light Visible light = light we see _______________ – red – orange – yellow – green – blue – indigo – violet

Light cont. Ultraviolet light = ______________that we can’t see Infared light = ________________of light we can’t see

What happens when light strikes a surface? 1. Reflection - _______________off a surface – ex. Mirror

– Refraction - ________________when it travels through a substance Ex. Water = slows light – image appears to be closer than it is.

Color Color = ___________ of a wavelength of light – visible light Visible = ROYGBIV

____________- triangular shaped objects made of clear glass – _____________into individual wavelengths – ROYGBIV

Sound Form of energy that ________________ - million times _________ than Light -Made by _________________________ -______________ best through ___________ - __________ amplitude = louder sound

Electrical Currents Conductors - materials that _________________________________ – metals, copper, gold, iron – allow electrons to flow through

Magnetic Fields Each end of a magnet has a __________ Pole = ____________________________ – ________ poles = same = they _______each other – _________ poles = _________ each other + and -

__________ = any piece of stone, metal that attracts iron or steel Magnetism = property of all matter only some materials have a strong enough magnetism to be noticed

cont The magnetic force = _________ at the poles ___________ = create magnetic pull When a magnet is heated or hammered the magnetic field of the electron return to their random positions

Insulators _________________= materials that electricity can’t travel through well. Ex. Rubber and Plastic= coating on a wire or plug.

Batteries Batteries = change ________energy to ________ energy - made of two metals and an acid acid _________ ___________ from one metal and adds it to another One metal becomes positively charged One is negatively charged

Circuit Circuit = ________ __________ of electricity flows through Usually contains a battery (energy) source, switch, and resistor (light) switch = open= electricity cannot flow switch = closed = electricity can flow