Computer/STEM & Robotics Exam(5-6)

What does STEM stand for?

• Science, Technology, Engineering, and Mathematics

• Science, Teaching, Engineering, and Mathematics

• Science, Technology, Environment, and Mathematics

• Science, Technology, Engineering, and Mechanics

What is the main goal of STEM?

• To learn individual subjects

• To combine areas to solve real-world problems

• To memorize scientific facts

• To study technology in isolation

What are the tiny particles that electricity is made of called?

• Protons

• Neutrons

• Electrons

• Atoms

What type of current does a battery produce?

• Alternating Current (AC)

• Direct Current (DC)

• Mixed Current (MC)

• Reverse Current (RC)

Which current is used in homes for larger appliances?

• Alternating Current (AC)

• Direct Current (DC)

• Mixed Current (MC)

• Forward Current (FC)

How many times per second does AC change direction in homes?

• 30

• 45

• 60

• 75

What do power plants use to generate electricity?

• Only coal

• Only solar power

• Various sources like coal, natural gas, wind, and water

• Only wind

What happens inside a generator to produce electricity?

• Water is heated

• Magnets spin near wires

• Batteries are charged

• Solar panels collect sunlight

What is static electricity?

• Electricity that moves in a circuit

• Electricity that stays in one place

• Electricity from a battery

• Electricity that powers homes

What materials are good conductors of electricity?

• Rubber and plastic

• Wood and glass

• Copper and aluminum

• Sand and cloth