生命元素

 This lesson is an introduction to the rest of the course. Topics studied will include:
~ Definition of elements
~ The names of the six elements needed by all living things
~ Atoms are the smallest pieces of elements
~ The names and locations of protons, neutrons, and electrons in atoms 

 Learners will understand the nature of molecules. Topics studied will include:
~ How molecules form by sharing electrons
~ Chemical energy and where it comes from
~ Our bodies need chemical energy to carry out functions
~ Draw a molecule of table salt and understand the chemical energy in this molecule 

 Learners will focus on the unique properties of carbon and why it is necessary for life. Specific topics include:
~ Draw an atom of carbon
~ Properties of carbon atoms including its ability to form many important molecules
~ Carbon in sugars, lipids, proteins, and DNA
~ Carbon is reused by living things in the carbon cycle 

 Learners will understand why oxygen is required for all living things by doing the following:
~ Draw an atom of oxygen
~ Study properties of oxygen, including its reactivity
~ Learn how different life forms get their needed oxygen
~ Understand that cellular respiration gives us energy for daily activities