Week 1: Week 1 Content
Grade 7 Science | Rosche | Kairos Academies
**Scientists Like Us:** In this lesson, you'll work as a team of scientists investigating [topic-specific content]. Every scientist brings unique perspectivesβyour ideas matter!
**Community Connection:** This phenomenon affects our community in [topic-specific content]. You'll investigate how scientists use evidence to understand [topic-specific content] in places like ours.
**Progress Checkpoint:** You've completed [topic-specific content]. Next up: [topic-specific content].
**Pair-Share:** First, think about [topic-specific content] on your own (1 min). Then share with your partner (2 min). Finally, we'll discuss as a class.
Accessibility & Learning Support
- Need text read aloud? Chrome: Right-click then "Read aloud" | Edge: Click speaker icon in address bar
- Working from home? Look for the HOME ALTERNATIVE boxes at each station
- Need extra support? Click the green "Need help?" buttons for hints and sentence starters
- Stuck? Look for the red "Stuck?" boxes with step-by-step help
NGSS Standards Covered This Week
MS-LS1-1 (Primary)
What it means: Conduct an investigation to provide evidence that living things are made of cells; either one cell or many different numbers and types of cells.
In student language: I can investigate and prove that all living things are made of cells.
MS-LS1-2 (Primary)
What it means: Develop and use a model to describe the function of a cell as a whole and ways the parts of cells contribute to the function.
In student language: I can create a model that shows what cells do and how each cell part helps the cell function.
3-Dimensional Learning
| Dimension | What You'll Practice |
|---|---|
| SEP-3 Planning & Carrying Out Investigations | Observe cells from different organisms |
| SEP-2 Developing & Using Models | Create a cell model using an analogy |
| DCI LS1.A Structure & Function | Learn what cell parts do |
| CCC-6 Structure & Function | Connect cell structure to cell function |
Success Criteria - How You'll Know You've Got It
Target 1: Explain that all living things are made of cells
Self-check: Can I explain the Cell Theory in my own words?
Target 2: Identify major cell organelles and their functions
Self-check: Can I name 5 organelles and explain what each one does?
Target 3: Compare plant and animal cell structures
Self-check: Can I identify what plant cells have that animal cells don't?
Target 4: Create a functional analogy model for a cell
Self-check: Can I compare cell parts to parts of a factory, city, or school?
Why This Matters to YOU:
You started as one cell and became trillions. Understanding cells explains growth, healing, and diseases like cancerβthe foundation of all biology!
The Phenomenon: The One Cell Wonder
Consider this amazing fact:
- You started as ONE single cell - a fertilized egg
- That one cell divided and became 37 TRILLION cells
- You have over 200 different types of cells (brain cells, skin cells, muscle cells...)
- All of these cells came from just ONE original cell
How is this possible? How can one tiny cell become something as complex as YOU?
Focus Question: How can a single cell become a whole human being?
Learning Targets
By the end of this week, you will be able to:
Vocabulary
Cognate Strategy: Many science words look similar in English and Spanish β use your Spanish to learn science!
| Term | Spanish | Definition |
|---|---|---|
| cell | celula | The basic building block of all living things |
| nucleus | nucleo | The control center of a cell that contains DNA |
| mitochondria | mitocondria | The "powerhouse" that makes energy for the cell |
| cell membrane | membrana celular | The outer boundary that controls what enters/exits the cell |
| cytoplasm | citoplasma | The gel-like substance that fills the cell |
| organelle | organulo | A specialized part inside a cell that does a specific job |
| cell wall | β | A rigid outer layer found only in plant cells |
| Cell | CΓ©lula | La unidad bΓ‘sica de la vida / The basic unit of life |
| Organelle | OrgΓ‘nulo | Parte especializada dentro de una cΓ©lula que hace un trabajo especΓfico / Specialized part inside a cell that does a specific job |
| Nucleus | NΓΊcleo | Centro de control de la cΓ©lula que contiene el ADN / Control center of the cell that contains DNA |
| Mitochondria | β | Mitocondria |
| Cell Membrane | β | Membrana celular |
| Cell Wall | β | Pared celular |
| Cytoplasm | β | Citoplasma |
Worked Example
Problem Scenario
Review the problem scenario and work through each step below.
Problem Scenario
Review the problem scenario and work through each step below.
Key Organelles to Know:
| Organelle | Function | Analogy |
|---|---|---|
| Nucleus | Control center with DNA instructions | Brain / Main office |
| Mitochondria | Makes energy (ATP) for the cell | Power plant |
| Cell Membrane | Controls what enters/exits | Security gate |
| Cytoplasm | Gel that holds organelles | Jell-O / Air in a room |
| Ribosomes | Makes proteins | Factory workers |
Step-by-Step Problem Solving
Practice These Vocabulary Terms
Meet the Scientist: Elizabeth Blackburn
Elizabeth Blackburn is a molecular biologist who won the 2009 Nobel Prize in Physiology or Medicine for her groundbreaking discovery about how cells age. While studying a single-celled organism called a tetrahymena, she discovered telomeres - the protective caps at the ends of chromosomes that shorten each time a cell divides.
The Discovery: Blackburn found that cells have a built-in "aging clock." Every time your cells divide (which happens millions of times throughout your life), the telomeres get shorter. When telomeres get too short, the cell stops dividing and either becomes inactive or dies. This explains why our cells can only divide about 50-70 times before they wear out - it's a protection mechanism! But Blackburn also discovered an enzyme called telomerase that can rebuild telomeres, potentially extending cell life.
Why This Matters: Understanding telomeres helps explain aging and disease. In cancer cells, telomerase is often overactive, allowing cancer cells to divide infinitely - a key reason they're so dangerous. By studying cells at this level, Blackburn's work has opened new pathways for treating aging-related diseases, cancer prevention, and understanding why some organisms live longer than others. Her work shows that the answer to fundamental life questions often comes from studying cell structure and function!
Connection to Grade 7: In Week 1, you're learning that cells are the building blocks of life and that organelles control cell function. Blackburn's research shows that the nucleus (which contains telomeres) directly controls how long cells can live. The structure of telomeres determines the function of the entire cell!
"We are not just passive observers of our aging process. By understanding how our cells work, we can potentially intervene to extend healthy lifespan." - Elizabeth Blackburn
INTERACTIVE: Explore Cell Structures
Before answering questions, spend 5-10 minutes exploring this simulation. Click on different parts of the cell to see what they do!
How to use the simulation (click to expand)
- Start with "Plant Cell" in the dropdown menu
- Click on organelles to see their names and functions
- Switch to "Animal Cell" - what's different?
- Try "Prokaryote" (bacteria) - which parts are missing?
- Ask yourself: What do ALL cells have in common?
Remember: There's no wrong way to explore! Click around and discover.
Key Observation Questions:
- What structures do ALL cells share?
- What's different between plant and animal cells?
- How can a single cell like a paramecium do everything it needs to survive?
Need extra support? Click here for hints and sentence starters
Key Concept Reminder:
- ALL cells have a cell membrane (outer boundary)
- Plant cells have an extra rigid cell wall
- The nucleus is the "brain" of the cell
Sentence Starters:
- "All cells have _____ in common..."
- "Plant cells are different because they have..."
- "I was surprised that..."
Word Bank:
cell membrane, cell wall, nucleus, cytoplasm, organelle, chloroplast, mitochondria, boundary
Stuck? Click here for step-by-step help
Try these steps in order:
- Look at the onion cell image - find the thick outer boundary (that's the cell wall)
- Look at the cheek cell image - find the thin outer boundary (that's just the cell membrane)
- What structure is in BOTH cells? That's what all cells have in common!
- Watch: Search "Plant vs Animal Cell"
- Still stuck? Email Mr. Rosche with your specific question
COMPLETE THE STATION 1 FORM BELOW
Observe the cell images and answer the comparison questions.
[EMBED G7.C1.W1 Station 1 Form Here]
Form ID: ________________
Learning Support Tracker
I do + You watch
We do together
You do + I check
Expert Thinking (Full Walkthrough):
"First, I notice the cell membrane controls what enters and exits. I'll identify examples: glucose enters (selective), but large proteins don't (barrier). This shows Structure β Function."
Your Turn - Follow this 5-step process:
- Read the scenario carefully
- Identify the cell structure involved
- Connect structure to function
- Find evidence in the simulation
- Explain with CCC connection
WORKED EXAMPLE: Predicting Cell Survival
Learn by following an expert's thinking process. Week 1 shows ALL steps.
PROBLEM:
A scientist creates three artificial cells in the lab, each missing one key organelle. Cell A has no nucleus. Cell B has no mitochondria. Cell C has no cell membrane. Predict which cell would die first and explain your reasoning using structure-function relationships.
STEP 1: Identify the function of each missing organelle
Expert thinks: "Let me recall what each organelle does:"
- Nucleus: Contains DNA (all instructions), controls cell activities
- Mitochondria: Produces energy (ATP) for the cell
- Cell membrane: Controls what enters/exits, holds cell together
- "I need to figure out which function is most immediately critical"
STEP 2: Predict immediate vs. delayed consequences
Expert thinks: "Let me analyze the timeline of failure:"
- Cell A (no nucleus): Could survive SHORT-TERM using existing proteins, but can't make new ones or reproduce
- Cell B (no mitochondria): Could survive SHORT-TERM using stored ATP, but will run out of energy soon
- Cell C (no membrane): Would IMMEDIATELY fall apart - nothing holding it together!
- "The membrane is needed RIGHT NOW - without it, there's no 'cell' at all"
STEP 3: Apply structure-function reasoning
Expert thinks: "I need to connect STRUCTURE to FUNCTION:"
- Cell membrane STRUCTURE: Flexible barrier made of phospholipids
- Cell membrane FUNCTION: Defines cell boundary, keeps contents in, keeps unwanted substances out
- Without this structure β No containment β Cytoplasm spills out β Instant death
- "This is the most fundamental structure - you can't have a 'cell' without a boundary!"
STEP 4: State conclusion with evidence
Expert thinks: "Let me write my final answer:"
Cell C (no membrane) would die first - within seconds. The cell membrane is the most immediately critical structure because it defines the cell boundary and contains all cellular contents. Without it, the cytoplasm and organelles would instantly disperse into the surrounding environment. While Cell A and Cell B would eventually die (Cell B likely within hours as ATP runs out, Cell A within days as proteins degrade), Cell C wouldn't exist as a functional cell at all without a membrane. This demonstrates that structure determines function - the membrane's barrier structure is essential for the cell's most basic function: existing as a discrete unit.
SELF-EXPLANATION PROMPT:
Why did the expert rank the membrane as most critical? Try explaining in your own words: "The cell membrane is most important because... whereas the nucleus and mitochondria..." (Think about IMMEDIATE vs. DELAYED consequences)
Station 2 - Cell Structure Investigation
20 Points | ~15 Minutes
Your Mission: Learn What Each Organelle Does
Need extra support? Click here for hints
Memory Tricks:
- Nucleus = "Nuclear" like a nuclear power plant's control room
- Mitochondria = "Mighty-chondria" because it makes MIGHTY energy
- Membrane = "Member-brane" because it decides who's a "member" (allowed in)
Sentence Starters:
- "The nucleus is like a _____ because..."
- "Without mitochondria, a cell couldn't..."
- "The structure of the _____ helps it function by..."
COMPLETE THE STATION 2 FORM BELOW
Learn organelle functions and connect structure to function.
[EMBED G7.C1.W1 Station 2 Form Here]
Form ID: ________________
Station 3 - Design a Cell Model
25 Points | ~20 Minutes (Highest Value!)
Engineering Challenge: Cell as a _____ (You Choose!)
YOUR CHOICE: Select Your Analogy Approach
You have THREE analogy frameworks for modeling a cell. YOU choose the one that interests you most! All three can earn full points.
Option A: Cell as a Factory (Industrial System)
Model the cell as a manufacturing facility with production lines, power plants, shipping departments, and management offices. Emphasizes specialized roles and production efficiency. If you value efficiency, industry, and production systems, choose this path.
Option B: Cell as a City (Community System)
Model the cell as a city with government (nucleus), power plants (mitochondria), borders (membrane), and transportation networks. Emphasizes interconnected systems and organization. If you value community, organization, and interconnected systems, choose this path.
Option C: Cell as a Spaceship (Survival System)
Model the cell as a self-contained spacecraft with life support (mitochondria), command center (nucleus), hull (membrane), and resource management. Emphasizes survival and self-sufficiency. If you value exploration, self-reliance, and survival engineering, choose this path.
Why This Matters - Relevance to YOUR Life:
- Health: Understanding cell analogies helps you understand diseases - when doctors say "cancer is uncontrolled cell growth," you'll know what's breaking down!
- Careers: Cell biology analogies are used by biomedical engineers designing artificial organs, drug developers targeting specific organelles, and science educators teaching complex concepts
- Daily Life: Your body replaces 330 billion cells EVERY DAY - knowing how cells work helps you understand why nutrition, sleep, and exercise matter at the cellular level
Example: Cell as a Factory
| Cell Part | Factory Equivalent | Why? |
|---|---|---|
| Nucleus | Main Office | Contains all instructions (blueprints/DNA) |
| Mitochondria | Power Plant | Provides energy to run everything |
| Cell Membrane | Security Gates | Controls what comes in and goes out |
| Ribosomes | Assembly Line Workers | Build products (proteins) |
Need extra support? Click here for design hints
Design Tips:
- Pick something you know well!
- Focus on the FUNCTION, not what things look like
- Ask: "What does this job in my analogy?"
Sentence Starters:
- "I chose to compare a cell to a _____ because..."
- "In my analogy, the nucleus is like _____ because both..."
- "One limitation of my model is that..."
COMPLETE THE STATION 3 FORM BELOW
Design your cell analogy and explain your choices!
[EMBED G7.C1.W1 Station 3 Form Here]
Form ID: ________________
Exit Ticket - Cell Basics Integration
23 Points | ~15 Minutes
Show What You Learned
YOUR CHOICE: Select Your Response Format for Integration Question
For the integration question (connecting structure to function), YOU choose how to demonstrate your understanding:
Option A: Written Explanation
Write 3-4 sentences explaining how a cell structure relates to its function. Choose this if you express yourself best through writing.
Option B: Labeled Diagram
Draw and label a cell part showing HOW its structure enables its function (include arrows and annotations). Choose this if you think visually.
Option C: Analogy + Justification
Create an analogy that shows the structure-function relationship, then explain why your analogy works. Choose this if you like creative comparisons.
Question Types:
- 4 NEW - Cell Theory, organelle functions, plant vs animal
- 0 SPIRAL - This is Week 1! No review questions yet.
- 1 INTEGRATION - Connect structure to function (you choose your response format above!)
- 1 SEP-1 - Generate scientific questions about cells
Remember:
This is your first Exit Ticket! Starting next week, you'll also have spiral questions that review what you learned in previous weeks.
COMPLETE THE EXIT TICKET BELOW
This is your final assessment for Week 1. Take your time!
[EMBED G7.C1.W1 Exit Ticket Form Here]
Form ID: ________________
Enrichment & Extension
Optional deep dives for early finishers.
Optional content if you finish early or want to go deeper.
Scientist Spotlight
Research a scientist who contributed to this week's topic area and describe their key findings.
Environmental Justice Connection
Explore how this week's science concepts connect to environmental justice issues in our community.