unit 1: matter and energy in living systems · think, pair, share •working with a partner....
TRANSCRIPT
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Unit 1: Matter and Energy in Living
Systems
Unit Starter
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5/1/19 DO NOW
•PAGE 3 UNIT STARTER
•VIEW THE DIAGRAM
•ANSWER QUESTION # 1
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Think, Pair,
Share
• Working with a partner.
• Think about and identify 3 – 5 other organisms that might live in the pond.
• Discuss the feeding relationships of these living things in the pond ecosystem.
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Matter and Energy in Organisms
Exploration 1:
Describing Matter and Energy in Organisms
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What is Matter?
• Matter is anything that has
volume and mass.
• Matter is made of atoms
• Living or Nonliving.
• Energy can hold matter
together or break it apart
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States of Matter
Living things need matter to live because it provides them with materials needed to make food
What do you think matter is used for?
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Matter is made of Atoms.
• Matter is used to build bodies. It's also needed to carry out the processes of life.
• An atom is the smallest particle of any kind of matter
• Building blocks
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An atom consists of a
•Nucleus ( protons and neutrons) • electrons in space around the
nucleus.
The Atom
Nucleus
Electron cloud
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The Language of ChemistryCHEMICAL ELEMENTS -
• pure substances that cannot be broken down by ordinary means to other substances.
SodiumBromine
Aluminum
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There are 100 types + Elements
AN ATOM of an element
is the smallest particle of that element
Al atoms make up the element aluminum.
What is the smallest part of the element bromine?
AlBr
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Samples of elements
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The red compound is composed of• nickel (Ni) (silver)• carbon (C) (black)• hydrogen (H) (white)• oxygen (O) (red)• nitrogen (N) (blue)
COMPOUNDS: are composed of 2 or more different types of atoms. Different types of elements combined.
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Chemical compounds
2 or more elements chemically combined to form a new substance with new properties
Sodium
(Na)Chlorine
(Cl)
•Ex table salt (NaCl)
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Chemical compounds
• The two or more elements are in a fixed ratio
• 1 atom of Na joins with
• 1 atom of Cl
• Forms a molecule of the compound NaCl (table salt)
Sodium (Na)Chlorine (Cl)
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MOLECULE group of atoms held together by the chemical bond, chemical bonds stores energy.
Molecules are the smallest parts of a compound.
H2O C8H10N4O2 - caffeine
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Covalent Bonds Form when two or more
atoms SHARE electrons
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Matter and Energy in Organisms
Do Now: pg. 6-8 Questions 2-5
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GreenBlue
Red
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Energy• The ability to cause change
• In many forms:
❖ light energy from sun
❖ energy stored in bonds of food molecules (chemical energy)
❖ heat energy.
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How DO Organisms get Energy?
• All organisms need energy to live and grow
Producers: (autotrophs)
• Make their own food
Consumers: (heterotrohps)
• Get food from other living things
Decomposers:
• Get food from dead organisms & break it down
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ProducersPlants, algae, and some
bacteria:
• Use energy from Sunlight to make sugar
• Take matter from soil and air: water & carbon dioxide
• Use sugar as food.
• Breakdown sugar to get energy (used for life processes)
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Consumers:
• Organisms that get energy and matter by eating other organisms.
• Herbivores: consumers that eat only plants
• Carnivores: consumer that eat other animals
• Omnivores: consumers that eat both plants and animals
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DecomposersEarth’s recyclers
• Organisms that gets energy and matter by breaking down the remains of other organisms that have died.
• Use the bodies of other organisms as source of matter and energy
• Ex: fungi, bacteria, earthworms, slugs
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Conservationof
Energy andMatter
• Energy and matter cannot be created or destroyed
• Matter is limited.
• The flow of energy drives the cycling of matter through different parts of the environment.
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Chemical Reactions
Process in which atoms are rearranged to produce new substances
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What is Photosynthesis?A chemical reaction in which light energy is converted to chemical energy in
the form of glucose
Plants make their own food.
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Where does photosynthesis occur?
•Photosynthesis occurs in the leaves of a plant.
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What is needed for photosynthesis to occur?
•Light.
•The plant’s leaves use the light to make a sugar: glucose.
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Why do plants need glucose?Glucose is the food for the plant. It gives the plant energy to grow.
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How much glucose does a plant make?
• Plants make enough glucose to be used during the night and on cloudy days when they don’t get sunlight.
• The extra glucose is stored in the plant’s leaves and other parts as starch.
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What is the Equation for the Chemical Reaction of Photosynthesis?
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EQUATION FOR PHOTOSYNTHESIS
6CO2 + 6H2O +ENERGY C6H12O6 + 6O2
CARBON
DIOXIDE
WATER
GLUCOSE
OXYGEN
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What is the equation for the chemical reaction of photosynthesis?
Six molecules of carbon dioxide react with six
molecules of water to form 1 molecule of glucose
and six molecules of oxygen.
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Describe Photosynthesis
• The process of changing light energy to chemical energy
• Energy stored in sugar
• Plants and algae
• Plants need: light energy, CO2, and H2O
• Takes place in the chloroplasts, using chlorophyll, (green pigment in plants)
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What happens during photosynthesis?
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What happens during photosynthesis?
Plants capture light energy and use that energy to make glucose
Sunlight provides the energy needed by chlorophyll to change molecules of CO2 and H2O into glucose
Oxygen is released.
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Reactants
Products
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Cellular Respiration
• The breakdown of glucose molecules to release energy
• Takes place in all living things (Mitochondria)
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What is the chemical
equation for cellular
respiration?
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EQUATION FOR RESPIRATION
C6H12O6 +
GLUCOSE +
6O2
OXYGEN
6CO2 +
CARBON
DIOXIDE
6H2O + ENERGY
+ WATER + ATP
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PhotosynthesisVS
Respiration
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Overview of photosynthesis and respiration
PHOTOSYNTHESIS CELLACTIVITIES
RESPIRATION
SUN
RADIANT
ENERGY
GLUCOSE ATP(ENERGY)
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Photosynthesis &
Respiration
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