Materials: new catalyst sheet and worksheet
Turn in biogeochemical cycles worksheet to the front tray.
Catalyst (5 min):
1. During the carbon cycle, in what form are carbon atoms
generaly returned to the atmosphere?
A.
B.
C.
D.
Simple sugars
Carbon Monoxide
Methane
Carbon Dioxide
2. What process is it when water vapor changes into
clouds?
3. How do animals get their nitrogen?
Materials: None
Get out Virus Transmission Lab Worksheet from
yesterday.
Catalyst (5 min): Brainstorm: Viruses are hard for
human beings to treat. Why do you think this is?
What do human beings use to treat viruses?
Explain in 3-5 sentences.
Elite Eight Trait Check-Up
1. Respect the Threshold
1. Everyone on time?
2. Silent for First Five?
2. Be Prepared (2 min)
1. Seated
2. Have materials
3. Working on catalyst
Class Motto
If there is a problem,
We look for a solution.
If there is a better way,
We find it.
If we need help,
We ask.
If a teammate needs help,
We give.
Announcements
• SWIM MEETING WEDNESDAY at 8am! Sign up
outside my door if interested! Get 3 forms from me
Objectives
• I can create a hypothesis regarding
the spread of a virus.
• I can draw conclusions regarding the
origin of the virus and what leads to
the spread of viral disease.
Objectives
• I can state the components of a virus.
• I can explain why a virus is considered
nonliving.
• I can explain the differences between a virus
and a bacteria.
• I can explain how a virus replicates.
Virus Video
What is a virus?
Coat of proteins
(called a Capsid)
Nucleic
Acid
Viruses are non-living
infectious agents.
Parts of a virus:
1. nucleic acid (DNA
or RNA)
2. protein coat.
Examples: influenza
(the flu), the common
cold, HIV, and the
West Nile Virus
What is a virus?
Viruses come in many shapes, some of which are coated in a
membrane, while others have tails.
What is a virus?
Viruses come in many shapes, some of which are coated in a
membrane, while others have tails.
What is a virus?
• Bacteriophage: a
virus that infects
bacteria.
Bacteria and viruses
both make human
beings ill, but are
different in many
ways.
Why aren’t viruses considered living things?
Viruses are not living
because:
1. Not made of cells
2. Do not grow or
develop
3. Do not use energy
4. Cannot reproduce
without a host
Close-up: How a virus uses host cells
to reproduce
LYTIC CYCLE
Close-up: How a virus uses host cells
to reproduce
Lysogenic Cycle
LYSOGENIC CYCLE
How do we treat viruses?
• Difficult to treat
• Try to prevent
them with
vaccines, which
train our immune
systems to fight
viruses.
• Also rest and fluids
Why is it hard to treat viruses?
• They are
constantly
mutating.
• Once scientists
develop a vaccine,
it is no longer
effective.
• Ex. Common Cold
Independent Practice: Venn Diagram
Make a Venn Diagram comparing and
contrasting Bacteria and Viruses.
Use the following words:
Self replicating, vaccine, cell wall, microscopic,
protein coat, prokaryotic, does not grow,
needs a host cell, antibiotics, harmful, DNA,
strep throat grows, cells, influenza
Independent Practice: Venn Diagram
self-replicating
vaccine
cell wall
cells
prokaryotic
killed by antibiotics
grow and develop
strep throat
microscopic
DNA
harmful
protein coat
Influenza
Do not grow and
develop
Need host cell
PANTHER PASS
1.
2.
3.
4.
5.
What are the 2 parts of a virus?
Are viruses living or nonliving? Give 2
reasons why.
How do we treat viruses?
How does evolution make it hard to treat
viruses?
Name one difference between a virus and
a bacteria.