Body Fuel Slides Day 1 • 20 Min Science Energy in Living Things
Body Fuel:
How Food Powers You
You already know animals need food to live—now let's discover how your body turns bites of food into real physical energy!
Energy as Fuel
Body Heat
Growth & Repair
Think About It
Prior Knowledge Check
What Happens When You Skip Breakfast?
Your stomach rumbles, your eyelids feel heavy, and running across the playground feels like hard work. Why?
Your biological energy tank is running low!
Food Is Stored Fuel
Just like a sports car needs gasoline to turn wheels, your body needs food to power every muscle, breath, and heartbeat.
Food holds stored chemical energy!
Turn to your neighbor: What did you eat today that is powering your brain right now?
Where Does That Energy Go?
The 4 Big Jobs of Food
1. Motion
Walking, jumping, talking, and your heart pumping 24/7.
Muscles Move
2. Warmth
Keeping your internal body temperature around 98.6°F.
Thermal Heat
3. Growth
Building new bones, longer limbs, stronger muscles, and teeth.
New Cells
4. Repair
Healing scraped knees, fixing worn tissues, and fighting bugs.
Self-Healing
Even when you are fast asleep, your body uses food energy to stay warm, breathe, and repair!
How Does Food Turn into Energy?
Inside Your Cells
1
You Eat & Digest
Your stomach and intestines break down food into tiny nutrient molecules like glucose (sugar).
2
Blood Delivers Fuel
Your bloodstream acts as a highway, delivering food molecules and oxygen to trillions of living cells.
3
Cells Release Energy
Cells unlock the stored chemical energy in food, powering muscles, organs, and body heat!
Key Takeaway: Food is not just something tasty—it is stored chemical fuel for life!
NGSS 5-PS3-1
Independent Practice (10 Mins) Day 1 Mission
Ready for Your
Reading Comprehension Page?
Put your science thinking caps on! Read the brief passage on your handout and solve the four energy challenges.
Identify how your body uses energy (motion, heat, growth, repair)
Explain why sleeping still requires food fuel
Teaser for Tomorrow: Where did that food energy originally come from?
Time remaining: 10 minutes • Work independently or with your shoulder partner
Body Fuel Reading Science • Day 1 Energy & Living Systems
10-Minute Activity
Body Fuel: How Food Powers You
Read the passage below, then answer the questions to explain how your body uses energy.
Name:
Date:
Informational Text: Fueling the Human Engine
You already know that all animals must eat food to grow and stay alive. But what really happens inside you after you take a bite? Food is not just something delicious—it is stored chemical fuel ! Just like an automobile engine needs gasoline to drive down the highway, your body requires food to power every move you make.
Once your digestive system breaks food down into tiny nutrient molecules, your bloodstream carries them to trillions of cells. Your body spends this stored energy in four major ways:
1. Motion Running, kicking, speaking, and pumping blood.
2. Warmth Maintaining your 98.6°F internal body temperature.
3. Growth Building taller bones, new muscles, and teeth.
4. Repair Healing scrapes, mending tissues, and fighting illness.
A Quick Check (Choose the best answer)
1. In scientific terms, food is best described as:
A. An empty liquid that washes away waste
B. Stored chemical fuel your cells release for energy
C. Heat from the air that enters your lungs
2. Why does your body use food energy even when you are asleep?
A. To keep your heart beating, stay warm, and repair cells
B. Sleeping bodies do not use any food energy
C. Only to make your legs dream about sprinting
B Classify: Which of the 4 Jobs is at Work?
Write Motion , Warmth , Growth , or Repair next to each scenario:
A cut on your finger scabs over and heals:
You outgrew your shoes from last winter:
Your body shivers to stay at 98.6°F in snow:
You sprint to catch the school bus:
C Scientific Reasoning
A friend says: "Cars need fuel because they have engines, but people only eat food because they like the taste." How would you explain to your friend that your body actually uses food just like a car uses fuel?
Next Lesson: Where does the energy inside your food come from originally? Solar Powered Bodies • Day 1
Sun Power Slides Day 2 • 20 Min Science Tracing Energy to Its Source
Sun Power:
The Solar Secret in Your Food
Yesterday we discovered your body runs on food fuel. Today, prepare to be amazed: every single bite you take was powered by the sun!
Solar Radiance
Plant Energy Traps
Food Chains to You
The Energy Detective Mystery
Where Did the Energy Start?
Yesterday's Fact:
Food holds stored chemical energy that allows your muscles to move, your brain to think, and your cuts to heal.
Established in Lesson 1 ✓
Today's Mystery Question:
Animals cannot make energy out of thin air. So where did the energy inside an apple, a carrot, or a chicken nugget originate?
Answer: A star 93 million miles away!
Every single living creature on Earth is plugged into the same cosmic power plant!
Nature's Solar Panels: Plants!
How Solar Energy Becomes Food
1. Sunlight Shines Down
The sun beams down continuous light and heat energy across the entire planet.
Light Energy
2. Leaves Catch Light
Green plant leaves absorb sunlight, water, and carbon dioxide from the air.
Solar Collectors
3. Stored Chemical Energy
Plants lock that sunlight into sweet sugars and starch—the world's first food!
Food Is Born
Plants are the only living things on land that can capture sunlight and manufacture food energy!
Trace the Energy Trail
From Sun to You
Path A: Eating Plants Directly Example: Fresh Apple or Corn
Sun
Apple Tree
You! (Energy to run)
Path B: Eating Animal Products Example: Glass of Milk or Cheese
Sun
Pasture Grass
Cow (Makes Milk)
You!
Even if you eat meat or dairy, the cow got its energy from grass, which got its energy from the sun!
Independent Practice (10 Mins) Day 2 Mission
You Are Solar Powered!
When you run, talk, think, and stay warm today, you are releasing captured sunlight stored inside your food.
Read today's passage: Tracing Energy to the Stars
Trace a slice of cheese pizza back to sunlight
Write your scientific argument explaining why all animal energy comes from the sun
Time remaining: 10 minutes • Complete your Day 2 Reading Comprehension Page!
Sun Power Reading Science • Day 2 Tracing Energy to Its Source
10-Minute Activity
Sun Power: The Solar Secret in Every Meal
Read the passage below, then trace energy chains back to the sun and explain the science.
Name:
Date:
Informational Text: Earth's Cosmic Power Plant
Yesterday, we discovered that your body burns food as chemical fuel for motion, warmth, growth, and repair. But where did that energy originate? No animal on Earth can create energy from scratch. If you trace any meal backward, you will always arrive at the same blazing star: the sun !
Located 93 million miles away, the sun floods our planet with radiant light energy. Green plants act as Earth's natural solar panels. Their leaves trap sunlight and combine it with air and water to manufacture nutrient-rich sugars and starches. When you eat an apple, you take in that trapped solar energy directly. When you eat chicken or cheese, you eat an animal that ate grains or grass. In every bite of food you consume, you are unlocking stored sunlight !
A Concept Check (Choose the best answer)
1. Why are green plants essential for life on Earth?
A. They capture sunlight and convert it into edible chemical energy
B. They absorb heat from animal bodies to cool down the planet
C. They create sunlight deep underground inside their roots
2. If you eat scrambled eggs for breakfast, where did that energy start?
A. The hot frying pan that cooked the eggs
B. The sun, which grew grain that the chicken ate to make the egg
C. The refrigerator where the eggs were stored
B Energy Detective: Trace the Pizza Trail
Order the steps of energy flow from origin to an active student eating a slice of cheese pizza (Number 1 to 4):
Wheat & Grass Grow
Plants use sunlight to grow wheat for dough and grass for cows.
Step:
The Sun
Radiant light energy travels 93 million miles through space.
Step:
Student Runs
Your cells burn pizza fuel to run and kick a soccer ball.
Step:
Cow Makes Milk
Cows eat grass, storing energy in milk used to make mozzarella cheese.
Step:
C Construct an Explanation (Claim & Evidence)
A classmate says: "I don't need the sun for energy because I only eat meat and cheese, not vegetables." Write an explanation using evidence from food chains to prove why even meat and cheese are powered by the sun.
Unit Complete: You are officially walking, talking solar power! Solar Powered Bodies • Day 2
