Mechanical, Thermal, & Sound Energy
Mechanical energy is the energy of _____.
Motion
Why are wires wrapped in plastic or rubber?
The plastic/rubber acts as an insulator to stop the flow of electricity from burning people or catching things on fire.
Light travels in ______ lines.
Straight
What is the difference between a conductor and an insulator?
A conductor allows heat or electricity to flow through, while an insulator stops the flow of energy.
What is the nearest planet to the sun?
Mercury
Sound waves are created by the ______ of air molecules.
In order to complete a circuit and turn on an appliance, a switch must be _______.
Closed
What are the 3 B's of refraction?
Bent, bigger, broken!
What is refraction?
The slowing down or speeding up of light as it travels through a new medium, which causes it to change direction. This makes objects appear bent, bigger, and broken.
What is the largest known animal?
Blue whale
What is the name of the process in which gas changes states to a liquid?
Condensation
What causes shadows?
Light traveling in a straight line gets absorbed when it hits an object, and creates an absence of light in the shape of the object.
Name an example of a medium.
Air, water, glass, plastic, etc.
How many bones are there in the human body?
206
Name something that converts electrical energy into mechanical energy.
Answers vary, but may be things like an electric fan, electric pencil sharpener, or electric toaster.
What is the purpose of a fuse?
A fuse is used to stop the flow of electricity in a circuit. If the current gets too high, the metal in the fuse melts or breaks, disconnecting the circuit.
Translucent
What is the process through which plants use sunlight to gain energy?
Photosynthesis
What is the hardest known natural material?
Diamonds
Which form of heat transfer is used when cooking food directly on a hot griddle (through direct contact)?
Conduction
C- Switch Z only
D- The laser (The angle at which a light ray strikes a mirror is the same angle at which it will bounce back!)
What is the item (typically made of glass or plastic) that separates white light into all of the colors of the rainbow through the process of refraction?
Prism
How many hearts does an octopus have?
Three!