1. WARM UP In your IAN Notebook, write the following: 1.NAME of the 4 Major Biomolecules 2.Where each Biomolecule is synthesized in the cell (Two organelles should be stated for one of them) 3.One function of each Biomolecule (Two different functions should be stated for one of them) 4.No STAMPS will be given until completed!

2. Heat Transfer Unit 12: Energy and Ecology

3. DEMOS Pay attention to what you see and write down your observations in your notebook. Later today, I will ask you what type of Heat Transfer you observed!

4. Thermodynamics The study of how heat moves

5. Heat Transfer Heat moves from HOT to COLD Insulators slow down heat transfer Conductors easily allow heat transfer

6. Heat Transfer Heat transfer continues until BOTH objects are in Thermal Equilibrium. This means that both objects are at the SAME TEMPERATURE!

7. Heat Transfer There are 3 types of Heat Transfer Conduction Convection Radiation

8. Heat Transfer Conduction - Heat transfer through objects that are touching each other Example: Metal spoon in hot pot

9. Heat Conduction When you heat a metal strip at one end, the heat travels to the other end. As you heat the metal, the particles vibrate, these vibrations make the adjacent particles vibrate, and so on and so on, the vibrations are passed along the metal and so is the heat.

10. Heat Transfer Convection - Heat transfer through moving currents in liquids or gases Examples: Hot air rises, cold air falls creating wind in storms; currents in heated water.

11. Convection Currents

14. Much of Earth’s climate is regulated by giant convection currents in the ocean

15. Heat Transfer Radiation - Heat transfer through electromagnetic waves. Examples: Sun warms the Earth; standing far from a fire but feeling the warmth

16. Heat Transfer?