EOY Bellwork 1: Forms and Transformations of Energy

What is an example of energy transformation from chemical to thermal energy?

• Burning wood

• Electricity powering a light bulb

• Photosynthesis

• A fan turning on

Answer explanation

Burning wood is an example of energy transformation from chemical to thermal energy, as the chemical energy stored in the wood is released as heat when it burns.

Which process involves the transfer of heat through direct contact?

• Evaporation

• Conduction

• Radiation

• Convection

Answer explanation

Conduction is the process of heat transfer through direct contact between materials. When two objects at different temperatures touch, heat moves from the hotter object to the cooler one, exemplifying conduction.

Which energy transformation occurs in photosynthesis?

• Electrical to mechanical

• Radiant to chemical

• Chemical to thermal

• Mechanical to sound

Answer explanation

In photosynthesis, plants convert radiant energy from sunlight into chemical energy stored in glucose. This transformation is essential for producing food, making 'radiant to chemical' the correct choice.

Tags

NGSS.MS-LS1-6

What is an example of thermal energy transfer through convection?

• Heat from the sun

• Touching a hot stove

• Boiling water

• Electricity powering a light bulb

Answer explanation

Boiling water is an example of convection, where heat is transferred through the movement of fluid. As water heats up, it rises, and cooler water moves down, creating a circulation pattern that transfers thermal energy.

Which of the following is a source of chemical energy?

• Wind

• Batteries

• Sound waves

• Sunlight

Answer explanation

Batteries are a source of chemical energy as they store energy in chemical form and release it as electrical energy when needed. In contrast, wind, sound waves, and sunlight are forms of kinetic or radiant energy, not chemical.