IC3 Common Assessment (updated 2024)

Front

What conclusion can you draw about the energy released when food is burned outside the body compared to when it is metabolized with oxygen inside the body?

Back

The energy released from burning food outside the body is similar to the energy released when food reacts with oxygen inside the body.

Front

Why do fats yield more energy per gram than carbohydrates?

Back

Fats yield more energy per gram than carbohydrates because their chemical structure contains more energy-rich bonds.

Front

During our class experiment, why did the water temperature increase more when burning the oil sample compared to the marshmallow sample?

Back

Because the energy to heat the water came from the food, and since the oil sample caused a greater temperature increase, fats provide more energy than carbohydrates when burned.

Front

What happens to starch molecules in rice as they are processed in your mouth?

Back

Rice contains the carbohydrate, starch. When I eat rice, it is chewed and mixed with saliva in my mouth. An enzyme in the saliva helps starch react with water to break down into smaller carbohydrate molecules.

Front

Is food the only way your body gets the energy it needs to function?

Back

Yes. Food provides the chemical energy that the body transforms into usable energy for all its activities.

Front

Why is Charlotte's body always using energy even when she is not eating?

Back

I store food in my body when I eat. My body uses this stored food later on to give me the energy to do things when I am not eating.

Front

How do children use the food they eat to increase their body size?

Back

Children use food molecules to build larger molecules that form new body tissues, helping them grow.

Front

What is the main source of a plant's increased mass when a small seed grows into a large plant?

Back

It uses sunlight to create food from carbon dioxide and water through photosynthesis.

Front

Process of cellular respiration in living organisms.

Back

glucose + O2 → CO2 + H2O

Front

How is the chemical reaction for food burning related to photosynthesis, the chemical reaction plants use to make food molecules?

Back

The burning of food releases energy from glucose, which is produced by photosynthesis in plants.