11/17

• 1. current science• 2. energy refresher, application to biology & ATP• 3. energy worksheet apply your new knowledge!• RAFT on ATP• HW: finish RAFT, exit slip next class

IN BIOLOGY

ENERGY

1ST LAW

•Energy is never created or destroyed

•Energy DOES change form

FORMS OF ENERGY

KINETIC - movement POTENTIAL-Stored

EXAMPLE OF 1ST LAW AND CHEMICAL ENERGY

SUN DOESN’T CREATE ENERGY

Nuclear Potential Energy (Hydrogen atoms)

Light energy

Fun trivia knowledge! •600 million tons of hydrogen are converted to helium EVERY SECOND•The sun will continue to get brighter, so in about 3.5 billion years it will be too hot to have liquid water. •In about 6 billion years the sun will run out of hydrogen and expand into a red giant, consuming Mercury and Venus and possibly Earth (it won’t go supernova and create a black hole at least)

SUN PROVIDES ENERGY FOR LIFE

ENERGY TRANSFER MOLECULE OF LIFE

ATP IS MADE FROM ADP AND P

ATP RELEASES ENERGY

AdenosineDiPhosphateAdenosineTriPhosphate

From an energy source like food

To do work

To flex muscle, start reaction or do anything really

ATP HYDROLYSIS

ATP

ADP

Pi

EXAMPLES OF ATP USE

ENERGY COUPLING

•Exothermic reactions (like the splitting of ATP) provide energy for endothermic reactions

Requires 3.4kCal

Releases 7.3kCal

EVERYTHING YOU DO REQUIRES ATP

• Each cell contains about 1 billion ATP molecules

• Which means about 10^23 molecules in the body

• The average ATP is used and reformed about 3 times per minute

2 MAJOR ENERGY REACTIONS WE WILL STUDY

PHOTOSYNTHESIS

• Sunlight Sugar• Light energy

Chemical energy

CELLULAR RESPIRATION

• Food ATP• Chemical energy

Chemical energy

WORK THROUGH SHEET TOGETHER

•Check with your teacher periodically•When finished begin work on your RAFT (HW)

RAFT

• Role: ATP• Audience: ADP• Format: Entirely up to you (letter, poem, song, tweets, facebook posts, social media I don’t even know about etc.)• Topic: Explain the role of ATP in conservation of energy of living things

•May work with 1 partner ONLY if there is a performance (e.g. singing or acting out)