How Are Fossil Fuels Formed — Reading Comprehension
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3
4
5
Standards
NGSS 4-ESS3-1
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This 250-word reading passage introduces fourth-grade students to the formation of fossil fuels, aligned with NGSS standard 4-ESS3-1 and the Disciplinary Core Idea ESS3.A. Students discover how coal, oil, and natural gas formed from the remains of ancient plants and animals that lived millions of years ago. The passage explains the process of decomposition, burial, and transformation through heat and pressure deep underground. Students learn why fossil fuels are considered nonrenewable resources and understand the connection between ancient sunlight energy captured by plants through photosynthesis and the energy stored in fossil fuels today. Written at a fourth-grade reading level, the passage uses accessible language and relatable examples to build foundational understanding. Audio integration supports diverse learners by providing multiple ways to access the content. The passage is accompanied by differentiated versions, Spanish translations, vocabulary glossary, comprehension questions, writing activities, and graphic organizers to reinforce learning and support various learning styles in the elementary science classroom.
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Dead plants and plankton become fossil fuels through heat and pressure.
Fossil fuels are energy sources like coal, oil, and natural gas that formed from the remains of ancient plants and animals. These fuels power our cars, heat our homes, and generate electricity.
Millions of years ago, plants used sunlight to grow in forests and swamps. When these plants died, they fell into water and mud. Tiny sea creatures called plankton also died and sank to the ocean floor. Layer after layer of dead plants and animals piled up over time.
As more layers built up, the remains got buried deeper and deeper underground. The weight of all those layers created tremendous pressure, like stacking hundreds of heavy books on top of each other. Deep underground, it also became very hot. This combination of heat and pressure slowly changed the plant and animal remains into different types of fossil fuels.
Plants that grew in swamps turned into coal. Tiny ocean creatures became oil and natural gas. This transformation took millions of years to complete. Think of it like making a peanut butter and jelly sandwich and pressing it in your lunchbox—but imagine that pressure lasting for millions of years!
Because fossil fuels take millions of years to form, they are called nonrenewable resources. Once we use them up, we cannot make more in our lifetime. The energy in fossil fuels originally came from ancient sunlight that plants captured long ago.
What are fossil fuels made from?
Rocks and mineralsAncient plants and animalsSand and waterModern trees and grass
Which is NOT a fossil fuel?
CoalOilWaterNatural gas
How long does it take to form?
A few daysA few yearsHundreds of yearsMillions of years
Why are fossil fuels called nonrenewable?
They are too expensiveThey take millions of years to formThey are found only undergroundThey pollute the environment
What helps turn remains into fossil fuels?
Wind and rainHeat and pressureIce and snowLight and air
What did swamp plants become?
Natural gasOilCoalWater
Fossil fuels originally came from ancient sunlight.
TrueFalse
What are plankton?
Large ocean fishTiny sea creaturesTypes of rocksUnderground plants
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