Download - Energy and Life
Energy and LifeCh 8-1
Energy and Life
• Energy is the ability to do work
• All living things require energy just like our household appliances need energy to function
Autotrophic vs heterotrophic
• When talking about the energy of life we can break all of life up into two categories
• Autotrophs
• Heterotrophs
• Autotrophs are any living organisms that have the ability to make their own food
• Plants are an example of autotrophs because they make their own food through photosynthesis
Autotrophic vs heterotrophic
• Heterotrophs are any organism that must consume food in order to obtain energy because they can not make it themselves
• Animals are all heterotrophic
Autotrophic vs heterotrophic
Chemical Energy• Energy can come in many forms
• Energy can also be stored in chemical compounds
• Example: Carbon and Hydrogen in a candle combine with Oxygen in the air to produce water and Carbon Dioxide
Chemical Energy• We will look at chemical energy with three compounds
• AMP -- Adenosine Monophosphate
• ADP -- Adenosine Diphosphate
• ATP -- Adenosine Triphosphate
AMP• AMP is Adenosine Monophosphate
• AMP is made up of Adenine, Ribose and a Phosphate group that only has 1 Phosphate molecule
• AMP will store the least amount of energy of our chemicals
ADP• ADP is Adenosine Diphosphate
• ADP is made up of Adenine, Ribose and a Phosphate group that only has 2 Phosphate molecules
• ADP will store more energy than AMP but we will still need to store even more energy
ATP• ATP is Adenosine Triphosphate
• ATP is made up of Adenine, Ribose and a Phosphate group that only has 3 Phosphate molecules
• ATP will store the most amount of energy, like a fully charged battery
Glucose• Even though ATP store alot of energy, this energy only lasts for a few seconds
• Cells need to store energy for the long term as well
• They do this by storing energy in carbohydrates like glucose