Energy Transformations in Digestion

Which of the following energy transformations takes place during digestion?

• Thermal energy mechanical energy

• Mechanical energy → chemical energy

• Chemical energy mechanical energy

• Solar energy chemical energy

In which of the following scenarios is chemical energy being transformed into thermal energy?

• A squirrel uses the energy in seeds to build structures in its body.

• A tree captures sunlight to produce the sugars it uses for food.

• A fish is able to swim using the energy it gets from eating plants.

• A lion's temperature increases as it uses the energy it gets from its prey.

Animals can move as a result of what energy conversion?

• Chemical energy → mechanical energy

• Radiant energy → chemical energy

• Thermal energy mechanical energy

• Mechanical energy → kinetic energy

Energy obtained by an organism when it consumes food is

• absorbed into the bloodstream.

• transformed into other forms of energy.

• completely used during digestion.

• passed through the body as waste.

When the energy stored in food is used by animals to create signals sent by the brain to muscles, this is an example of which of the following energy conversions?

• Chemical energy → electrical energy

• Radiant energy → thermal energy

• Mechanical energy → chemical energy

• Thermal energy → electrical energy

Which of the following organisms transforms radiant energy into chemical energy?

• Butterfly

• Grass

• Mouse

• Deer

Mammals maintain a constant body temperature by converting -

• radiant energy to thermal energy

• chemical energy to electrical energy

• electrical energy to mechanical energy

• chemical to thermal energy

What is the law of conservation of energy and how does it relate to energy transfers?

• Energy can be created and destroyed at will

• Energy can only be transferred to living organisms

• Energy cannot be created or destroyed, only transferred or transformed from one form to another.

• Energy can be transformed into matter