Transcript Section 2 The Necessities of Life

Chapter 2
Section 2 The Necessities of Life
What You Will Learn
CA Standard
7.1.a Students know
cells function similarly
in all living organisms.
What It Means
Why It Matters
Cells perform the same
actions in all living
things.
At the cellular level, all
living organisms share
common traits.
< Back
Next >
Preview
Main
Chapter 2
Section 2 The Necessities of Life
Every organism needs:
1. Water
• makes up about
70% of your cells
• needed for most of
the chemical
reactions involved in
metabolism
< Back
Next >
Preview
Main
Chapter 2
Section 2 The Necessities of Life
Every organism needs:
2. Air
•
•
•
•
air = oxygen + nitrogen + carbon dioxide
oxygen releases energy from food
plants need carbon dioxide to make food
some organisms can live without air and are called
anaerobic
< Back
Next >
Preview
Main
Chapter 2
Section 2 The Necessities of Life
Every organism needs:
3. A Place to Live
• place must have all of the things they need to
survive
• Often organisms compete for the best places to
live. Space is limited, especially space that
includes food, water, and other necessities.
• The amount of space needed to survive varies
from organism to organism.
< Back
Next >
Preview
Main
Chapter 2
Section 2 The Necessities of Life
Every organism needs:
< Back
Next >
Preview
Main
Chapter 2
Section 2 The Necessities of Life
Every organism needs:
4. Food
• need food for
energy and raw
materials to
make cells and
build body parts
< Back
Next >
Preview
Main
Chapter 2
Section 2 The Necessities of Life
Every organism needs:
• three groups based on how they get their food:
– producers make their own food through
photosynthesis
ex: plants, algae, and some types of bacteria
– consumers must eat other organisms, such as
plants or animals, to get food
– decomposers are a group of consumers that
get their food from breaking down the nutrients
in dead organisms and their wastes
ex: mushroom, fungus
< Back
Next >
Preview
Main
Chapter 2
It's Alive!! Or Is It?
BrainPop: Food Chain
< Back
Next >
Preview
Main
Chapter 2
Section 2 The Necessities of Life
Nutrients
Producers, consumers, and decomposers
must all break down their food to use the
nutrients.
< Back
Next >
Preview
Main
Chapter 2
It's Alive!! Or Is It?
Appointments
< Back
Next >
Preview
Main
Chapter 2
It's Alive!! Or Is It?
Reinforcement Worksheet:
Compounds in Cells
Directions: Instead of taking notes, complete the
worksheet as we go over the slides.
< Back
Next >
Preview
Main
Chapter 2
Section 2 The Necessities of Life
Nutrients
1. proteins
– molecule made of
amino acids
– need for body
repair, growth,
and to regulate
processes in the
body
– ex: hemoglobin,
enzymes
< Back
Next >
Preview
Main
Chapter 2
It's Alive!! Or Is It?
Check your answer with your Earth
appointment.
< Back
Next >
Preview
Main
Chapter 2
Section 2 The Necessities of Life
Nutrients
2. carbohydrates
• molecules made of
sugars
• provide energy for
the cell
• store energy for
later use
• ex: sugar, starch
< Back
Next >
Preview
Main
Chapter 2
It's Alive!! Or Is It?
Check your answer with your plants
appointment.
< Back
Next >
Preview
Main
Chapter 2
It's Alive!! Or Is It?
BrainPop: Carbohydrates
< Back
Next >
Preview
Main
Chapter 2
Section 2 The Necessities of Life
Nutrients
3. lipids
• fat molecules
• cannot mix with
water
• some store energy
• some form the
membranes of cells
that protect the cell
• ex: fats and oils
< Back
Next >
Preview
Main
Chapter 2
It's Alive!! Or Is It?
Check your answer with your heredity
appointment.
< Back
Next >
Preview
Main
Chapter 2
Section 2 The Necessities of Life
Nutrients
4. Nucleic Acids
– carry the
directions for
making
proteins
– ex: DNA
– Made of
nucleotides
< Back
Next >
Preview
Main
Chapter 2
It's Alive!! Or Is It?
Check your answer with your genes
appointment.
< Back
Next >
Preview
Main
Chapter 2
Section 2 The Necessities of Life
BrainPop: Body Chemistry
< Back
Next >
Preview
Main