Electricity & Circuits
A circuit must be ______ for electricity to flow.
Closed
Q: Light travels in a _______ line.
A: Straight
Q: A solid, liquid, and gas are examples of what?
A: Physical states of matter
Q: Sugar stirred into water is an example of which mixture type?
A: A solution
Q: A material that allows electricity to flow is called a _______.
A: Conductor
What type of energy change occurs when a circuit lights a bulb?
Electrical → Light
Q: When light bounces off a surface, it is called ______.
A: Reflection
Q: If an object sinks in water, its density is _______ compared to water.
A: Greater
Q: When salt dissolves in water, is it a physical or chemical change?
A: Physical change
Q: A material that does NOT allow electricity to flow is called a(n) _______.
A: Insulator
A battery is an example of what part of a circuit?
Energy source
Q: When light bends passing from one material to another (like water to air), it is called ______.
A: Refraction
Q: Name a physical property: mass, magnetism, solubility, relative density, or conductivity?
A: Any correct physical property
Q: Electrical energy changed into sound is an example of energy ______.
A: Transformation
Q: Name one object that is magnetic.
A: Iron, nickel, or cobalt
A circuit that has a break and does NOT work is called what?
An open circuit
Q: A pencil looks bent in water. Which behavior of light causes this?
A: Refraction
Q: Salt dissolving in water forms what?
A: A solution
Q: A wire becomes warm when current passes through it. Electrical energy is transformed into what kind of energy?
A: Thermal (heat)
Q: Why is plastic used to coat electrical wires?
A: It is an insulator and keeps us safe
Q: Name two forms of energy electrical energy can change into in a complete circuit.
A: Light, heat, sound, or motion
Q: When light is taken in by an object instead of reflected or refracted, what happens to it?
A: It is absorbed
Q: What property tells whether a material allows heat or electricity to pass through?
A: Conductivity
Q: If lemon juice is added to water, what happens to the physical properties of the mixture?
A: The solution’s properties change (taste, smell, appearance)
Q: A magnet attracts only certain metals. Name one metal a magnet attracts and one it does NOT.
A: Attracts: iron/nickel/cobalt;
Does not attract: copper/aluminum/gold, etc.