Science-Input/Output Energy Practice

Front

Input energy form of a lamp

Back

electrical

Answer explanation

The input energy form of a lamp is electrical. It converts electrical energy into light energy, which is why 'electrical' is the correct choice, while thermal, light, and sound are not forms of input energy.

Front

Input energy form of an electric motor

Back

electrical

Answer explanation

The input energy form of an electric motor is electrical energy. This energy is converted into mechanical energy to produce motion, making 'electrical' the correct choice.

Front

Energy output form of a fan

Back

motion

Answer explanation

The energy output form of a fan is primarily in the form of motion, as it creates airflow by rotating its blades. While it may produce sound and some heat, the main function is to generate motion.

Front

Input energy for these items:

Back

electrical energy

Answer explanation

The input energy for all these items is electrical energy, as it powers devices and systems that convert it into other forms of energy like motion, sound, or thermal energy.

Front

Rubbing hands together generates heat, converting kinetic energy into _____

Back

thermal energy

Answer explanation

When you rub your hands together, the kinetic energy from the motion is transformed into thermal energy, which is why your hands feel hot. Thus, the correct answer is thermal energy.

Front

Part of the system that converts sunlight to motion energy.

Back

solar panel

Answer explanation

The solar panel is the part of the system that converts light energy from the sun into motion energy. It captures sunlight and transforms it into electrical energy, which can then be used to power devices like motors or fans.

Front

What does the oven do?

Back

Converts electrical energy to thermal energy.

Answer explanation

The correct answer is that the oven converts electrical energy to thermal energy. This process allows the oven to heat up and cook food, making it safe and palatable.

Front

Output energy form of a radio

Back

sound

Answer explanation

A radio converts electrical energy into sound energy. It receives radio waves and processes them to produce audible sound, making 'sound' the correct output energy form.