Exploring Energy Transformations in Physics

What does the law of conservation of energy state?

• The total amount of energy decreases over time.

• Energy can neither be created nor destroyed, only transformed or transferred.

• Energy cannot be transformed or transferred.

• Energy can be created and destroyed.

What is the role of food in providing energy to humans?

• Food's role is only nutritional, not energetic.

• Food contains chemical energy that can be transformed into other forms.

• Food is converted into potential energy.

• Food provides kinetic energy directly.

What type of energy do plants convert sunlight into?

• Kinetic energy

• Thermal energy

• Chemical energy

• Electrical energy

Why do animals eat plants?

• To convert light energy directly into kinetic energy.

• To obtain chemical energy stored by plants.

• Animals do not eat plants.

• To transform chemical energy into potential energy.

What illustrates the concept of energy being neither created nor destroyed?

• A car converting fuel into motion.

• A light bulb turning off.

• Water evaporating into steam.

• A battery losing charge over time.

How is the kinetic energy of wind used by wind turbines?

• Used to produce sound energy.

• It is stored as potential energy.

• Converted into electrical or mechanical energy.

• Transformed into chemical energy.

What happens to the potential energy of water in hydroelectric power generation?

• It is converted into kinetic and then electrical energy.

• It remains constant.

• It is directly converted into electrical energy.

• It is lost as heat energy.

What is the primary purpose of solar cells?

• To convert solar energy into electrical energy

• To absorb thermal energy

• To store solar energy as chemical energy

• To reflect sunlight

How do solar panels contribute to energy transformation?

• By converting electrical energy into solar energy.

• By storing solar energy as potential energy.

• By transforming solar energy into electrical energy.

• Solar panels do not contribute to energy transformation.

What is the difference between energy transfer and transformation?

• Transformation involves movement, transfer involves change in form.

• Transfer involves movement, transformation involves change in form.

• There is no difference; they are the same.

• Transfer can only happen in solid objects, transformation in fluids.