Circuits
What type of energy is the battery used to power the circuit?
Chemical Energy-Potential (stored)
What is an example of an object that emits both heat and light?
cell phone, sun, television, light
What is mechanical energy?
Energy in movement
How does sound energy travel?
Sound energy travels in waves from vibrations
What is renewable energy?
Energy that never runs out
Why are wires covered in plastic?
So electricity does not escape, the wires do not get hot, prevent fires
How do particles move when heated?
Particles move faster and farther apart (boiling water)
What can slow down or stop movement of mechanical energy?
Friction
What creates sound?
vibrations
Define and give 3 examples of physical change.
Physical Change-substance changes its size, shape or state.
cut, tear melt, chop, any part of water cycle
How does a switch work in a closed circuit?
A switch opens and closes the circuit to control the electricity from flowing to stopping. (Open=off) Closed=on)
How does heat travel?
Heat moves from warmer objects to cooler objects.
What is potential energy and give 1 example.
Stored energy-hand pulled back, top of a hill, a bow and arrow pulled back
In which material does sound travel the fastest?
Solids
Define and give 3 examples of chemical change
When a substance changes into a new substance
burning, cooking, digestion, rusting
What are conductors and insulators? Give 2 examples for each.
Conductors are materials that electricity and heat travel through. Conductors include metals, copper, aluminum, gold, and water.
Insulators resist the flow of electricity and heat.
Examples-rubber, glass, plastic, and wood.
What types of renewable energy can we get from heat and light?
Solar Energy and Geothermal Energy
What is kinetic energy and give 3 examples.
Energy moving-down a hill, closed circuit, moving bike, running
What are 3 materials materials travel through from slowest to fastest?
Slowest-gas, liquid, fastest-solid
What is the difference between a mixture and a solution and give an example of each.
Mixture-two or more items that can be separated easily: oil and water, salad rocks and sand
Solution-not easily separated-salt water, lemonade
What does a circuit need to work properly?
Battery (energy source), conductors for energy to flow through, a closed pathway with no gaps.
What are 3 examples of how light interacts when it hits an object?
reflect-bounces back-a mirror
bend (refract) when it changes mediums or hits a clear object
absorbs-the darker the color the more it absorbs into it
Give 3 examples of situations that have both potential and kinetic energy working together.
Roller Coaster-top of hill, going down a hill
Bike ride-stopped and peddling
Person-standing still, moving
What kind of sound will you get with slower and faster vibrations?
slower-lower sounds
faster-higher sounds
Name and explain 4 types of renewable energy.
Hydroelectric-from moving water
Biomass-Plants, animals and their waste
Wind-moving wind
Solar-sun
Geothermal-Heat inside the Earth