In a lab activity, a student connects a battery to a lamp using wires, and when the switch is closed, the light turns on. The circuit is closed and allows the electricity to flow through it, making the lamp light up. What is the name of the electricity that flows through a closed path? 

A child is assembling a circuit at home. They have a battery, wires, and a lamp. When they connect everything, they realize the lamp does not turn on. The child notices that the switch is in the "open" position. The circuit is only completed when the switch is closed, allowing the flow of electricity. What must the switch do to complete the circuit? 

 During a class activity, the teacher connects two batteries in series to a lamp to compare its brightness with that of a single battery. The teacher asks the students to observe how the intensity of the light changes when more batteries are added to the circuit. If you connect two batteries instead of one, what happens to the light of the lamp? 

A student is checking a circuit at home. The lamp is off, but they know the battery has enough charge. The student checks that the wire is broken. If the lights are off, and the wires are broken what is the status of the circuit? 

During a technology class, the teacher introduces several types of machines. They explain that simple machines are those that help perform tasks with less effort. The teacher shows examples such as a lever, pulley, and ramp, explaining how they make work easier. What is a simple machine? 

In a science activity, students are learning about different simple machines. The teacher shows them examples of how to use these machines to make work easier. The students see how levers, pulleys, and ramps are used to lift or move heavy objects more easily. What are simple machines used for? 

An engineer is explaining how complex machines are used in the industry. These machines have many components that work together to perform difficult tasks. Students watch how a complex machine, such as a crane, is used to lift large loads in construction. What are complex machines used for? 

During a physics class, the teacher explains the function of various components in an electric circuit. The teacher highlights that a resistor is used to limit the flow of electric current, allowing for better control of how much current flows to other components. What is the role of a resistor in a circuit? 

In a science demonstration, the teacher rubs a balloon on their hair and shows how the balloon can stick to a wall. The students learn that this phenomenon is due to static electricity, which is the buildup of electric charge on the surface of objects. What is static electricity?