Energy Content of Food

The video tutorial demonstrates the energy content in food by burning a cream cracker in liquid oxygen, highlighting the role of oxygen in energy release. It compares the energy content of peanuts and dried potatoes using a food calorimeter, showing that peanuts, high in fat, have more energy than potatoes, high in carbohydrates. The process involves igniting the food in a calorimeter and measuring the temperature change in water, indicating the energy released. The tutorial concludes that fat significantly increases energy content in food.

What is demonstrated by burning a cream cracker in liquid oxygen?

• The melting point of the cracker

• The color change in oxygen

• The energy content of food

• The taste of the cracker

How does the body release energy from food?

• By storing it in the liver

• Through a controlled reaction using oxygen

• By converting it into fat

• By exhaling it as carbon dioxide

What is the purpose of a food calorimeter?

• To calculate the temperature of food

• To assess the color of food

• To measure the weight of food

• To determine the energy content of food

What is the initial temperature of water in the calorimeter when testing dried potato?

• 29°C

• 25°C

• 30°C

• 21°C

How much does the water temperature rise when 1 gram of dried potato is burned?

• From 20°C to 24°C

• From 21°C to 29°C

• From 21°C to 25°C

• From 25°C to 30°C

What is the energy content of 1 gram of peanuts compared to dried potato?

• 20 K per gram for peanuts, 10 K per gram for potato

• 15 K per gram for both

• 10 K per gram for peanuts, 20 K per gram for potato

• 5 K per gram for peanuts, 15 K per gram for potato

Why do peanuts have a higher energy content than dried potato?

• Because they are roasted

• Because they are high in fat

• Because they contain more water

• Because they are high in carbohydrates

What role does fat play in the energy content of food?

• It decreases the energy content

• It has no effect on energy content

• It makes food less digestible

• It significantly increases the energy content