Download presentation
Presentation is loading. Please wait.
1
Unit 1: Energy TCHS Biology
2
Biology B-Day 8/20/18 Bellringer What is the definition of energy?
What is the equation for photosynthesis? Agenda Bellringer Why Humans Can’t Live off Sunlight Article Notes Photosynthesis and Medicine Lab-Background
3
Biology B-Day 8/20/18 Bellringer What is the definition of energy?
The capacity/ability to do work What is the equation for photosynthesis? Sunlight + 6 H2O + 6 CO2 C6H12O6 + 6 O2 Agenda Bellringer Why Humans Can’t Live off Sunlight Article Notes Photosynthesis and Medicine Lab-Background
4
Biology B-Day 8/22/18 Bellringer
Why can’t humans live off of sunlight? Why do plants perform photosynthesis? Agenda Bellringer Notes Spinach Leaf Lab
5
Biology B-Day 8/22/18 Bellringer
Why can’t humans live off of sunlight? We are not autotrophs, we have to consume other things to obtain energy Why do plants perform photosynthesis? To produce food and store energy Agenda Bellringer Notes Spinach Leaf Lab
6
Biology A-Day 8/23/18 Bellringer
Why was it important to create a vacuum in the syringe? Why did the leaf discs float? Agenda Bellringer Finish Lab Photosynthesis Video
7
Biology A-Day 8/23/18 Bellringer
Why was it important to create a vacuum in the syringe? To get all the oxygen out so the discs wouldn’t float Why did the leaf discs float? With the added light, the process of photosynthesis was occurring- producing oxygen which allowed the discs to float Agenda Bellringer Finish Lab Photosynthesis Video
8
Biology B-Day 8/29/18 Bellringer
Which leaf would be better to use in medication? Why? Which type of energy is stored in bonds? Agenda Bellringer Discuss Last Class Elodea and Snail Virtual Lab
9
Biology B-Day 8/29/18 Bellringer
Which leaf would be better to use in medication? Why? Leaf A, because they floated to the top quicker Which type of energy is stored in bonds? Chemical Energy Agenda Bellringer Discuss Last Class Elodea and Snail Virtual Lab
10
Biology A-Day 8/30/18 Bellringer
What are the two reactions that take place in photosynthesis? What organelle does photosynthesis occur in? Agenda Bellringer Snail and Elodea Virtual Lab Cellular Respiration Video & Questions
11
Biology A-Day 8/30/18 Bellringer
What are the two reactions that take place in photosynthesis? Light-dependent and Light- independent What organelle does photosynthesis occur in? Chloroplast Agenda Bellringer Snail and Elodea Virtual Lab Cellular Respiration Video & Questions
12
Biology B-Day 9/5/18 Bellringer
Why do snails need elodea in their tanks? Why was the control test tube green? Agenda Bellringer Amoeba Sisters Video Photosynthesis vs. Cellular Respiration Comparison Cellular Respiration Notes
13
Biology B-Day 9/5/18 Bellringer
Why do snails need elodea in their tanks? Elodea release oxygen into the tank for the snails to take in and Elodea take in the excess CO2 in the tank Why was the control test tube green? There is CO2 in the atmosphere already Agenda Bellringer Amoeba Sisters Video Photosynthesis vs. Cellular Respiration Comparison Cellular Respiration Notes
14
Partner Thoughts…. What are some sources of energy on Earth?
How is energy distributed around the Earth? What are some characteristics that make something “living”?
15
Characteristics of Living Things
responsiveness to the environment growth and change ability to reproduce have a metabolism and breathe maintain homeostasis being made of cells passing traits onto offspring (Containing DNA)
16
Characteristics of Life
17
Energy is the capacity to do work
Energy is the capacity to do work. It can not be created or destroyed, but can be converted or transferred.
18
Types of Energy: Kinetic vs Potential Kinetic is energy of motion including waves, electrons, and atoms Potential is energy of position including gravitational and chemical Chemical energy is a form of potential energy stored in the bonds of atoms Radiant energy – light, gamma rays, microwaves, radiowaves Thermal energy is transfer of energy (heat) from higher temperature to lower temperature substances.
19
Identify the types of energy
20
Whiteboard Challenge: How many energy types do you recognize in these jellyfish?
21
How do plants obtain energy?
Plants convert radiant energy into chemical energy through photosynthesis 6 H2O + 6 CO2 C6H12O6 + 6 O2 Whiteboard: Where does the oxygen from plants originate from?
22
How do plants store energy?
A pigment is a chemical substance that absorbs photon energy from light. Chlorophyll is the main pigment in plants that absorbs red and blue light (green light is reflected) When photons of red or blue light reach chlorophyll particular electrons become excited and move to a higher energy level for a fraction of a second and are quickly used in the production of glucose. Plants can only store small amounts of glucose so if there is rapid photosynthesis plants convert glucose into starch for storage. If not used they release heat as they go back to their ground state
24
How is energy released in cells?
Molecules such as glucose or fat contain a large amount of chemical energy and are used to make a large number of molecules that have smaller amounts of energy. This is done through cellular respiration which converts it into a phosphate bond on adenosine triphosphate (ATP)
25
If oxygen is used, the process is aerobic respiration
If oxygen is not available, the process of anaerobic respiration is used, but it produces much less ATP because it can not fully break down the glucose. This is why alcohol can burn – energy remains in the molecules.
27
Glucose cannot be made directly into ATP
Three step process Glycolysis Krebs Cycle Electron Transport Chain Takes place in the cytoplasm Breaks glucose down into 2 pyruvic acid/pyruvates (3-carbon compounds) Makes 2 molecules of ATP Anaerobic – no oxygen needed
28
KREBS CYCLE Also known as the Citric Acid Cycle Takes place in the matrix of the mitochondria Breaks down pyruvic acid into carbon dioxide Produces 2 ATP ELECTRON TRANSPORT CHAIN Energy carrying molecules (NADH) from glycolysis and the Krebs cycle enter the ETC Occurs in the inner mitochondrial membrane Use oxygen Makes 34 ATP molecules Heat, energy (ATP) and water are byproducts
29
Cellular Respiration Equation
C6H12O6 + 6O2 6CO2 + 6H2O + energy (ATP)
30
Anaerobic Respiration
Occurs without oxygen in the cell Anaerobic Releases energy from food and occurs with Glycolysis Two main types: Alcoholic fermentation Lactic acid fermentation
31
Learning Check Name the three parts of cellular respiration.
Where do they occur? What is needed for cellular respiration to occur? What is released at the end of cellular respiration? Write the balanced equation for cellular respiration. What are the two types of fermentation? When does lactic acid fermentation occur? How are ATP, NADPH and NADH similar?
32
How is thermal energy generated and lost in living organisms
How is thermal energy generated and lost in living organisms? Whenever energy changes form inside cells some of it is changed into thermal energy. The energy change causes particles to move more rapidly so their temperature rises. Chemical reactions can also release heat. Why do we get hot when we run?
33
Why do we got hot when we run
Why do we got hot when we run? Chemical energy in glucose generates kinetic energy and some of the chemical energy changes to heat in our muscles. Generation of thermal energy in organisms makes them hotter than surroundings and heat is transferred to the environment.
34
How do animals obtain energy
How do animals obtain energy? Animals obtain energy by consuming other organisms. Each cell is supplied with substances produced by digesting consumed organisms to release chemical energy such as from fats and carbohydrates.
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.