Passage
Grades 5–8
How Many Valence Electrons Does Oxygen Have?
physical science · MS-PS1-2
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“oxygen production” worksheets and activities
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Grades 6–8
Mass Production and Assembly Lines
us history
$1.50
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Grades 3–5
Assembly Line Production
us history · D2.HIS.2.3-5
$1.50
Passage
Grades 3–8
What is the Relationship between the Oxygen Cycle and the Carbon Cycle?
life science
$1.50
Passage
Grades 5–8
How Cells Release Energy Without Oxygen
life science · MS-LS1-7
$1.50
Passage
Grades 5–8
What Was the Oxygen Revolution
earth science · MS-ESS1-4
$1.50
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Photosynthesis in Ecosystems
life science · MS-LS1-6
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Grade 6
Anaerobic Respiration
life science
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Passage
Grades 5–8
Photosynthesis
life science · MS-LS1-6
$1.50
Passage
Grade 6
Uses Of Algae
life science
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Passage
Grade 6
Aerobic Organisms
life science
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Passage
Grades 5–8
Vampire Squid Adaptations
science · MS-LS4-4
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Grade 6
Aerobic Respiration
life science
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Grade 6
Anaerobic Respiration in Yeast
life science
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Grades 3–5
How Heart and Lungs Work Together
life science · NGSS 4-LS1-1
$1.50
Passage
Grades 3–8
What are the products of Photosynthesis?
life science
$1.50
Passage
Grades 3–5
How the Lungs Work
life science · NGSS 4-LS1-1
$1.50
Passage
Grades 3–5
How Animal Lungs Work
life science · NGSS 4-LS1-1
$1.50
Passage
Grades 4–6
Effects of Deforestation
science · 5-ESS3-1
$1.50
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Grade 6
Conditions for Germination
life science
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Grades 2–4
How can planting trees help fight climate change?
weather and climate · RI.3.1
$1.50
Passage
Grades 6–8
How Do Humans Degrade and Pollute Soil
earth science · MS-ESS3-3
$1.50
Passage
Grade 6
Effects of High Altitude on the Human Body
science
$1.50
Passage
Grades 3–8
Is a Platypus a Mammal?
science · MS-LS1-1
$1.50
Passage
Grades 3–8
How Many Hearts Does an Octopus Have?
science
$1.50
Passage
Grades 3–5
How We Breathe
life science · NGSS 4-LS1-1
$1.50
Passage
Grades 6–8
How Humans Disrupt Earth's Cycles
earth science · MS-ESS2-1
$1.50
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Grades 4–6
How Forests Affect Air
science · 5-ESS2-1
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Interactive
Grades 3–5
Animal Groups
science
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Passage
Grades 3–5
How Animal Hearts Work
life science · NGSS 4-LS1-1
Free
Interactive
Grades 1–5
Animal Body Parts and Their Functions
science
$1.50
Passage
Grades 4–6
Rusting Is Chemical Change
physical science · 5-PS1-4
$1.50
Passage
Grades 3–5
What Does Blood Do
life science · NGSS 4-LS1-1
$1.50
Passage
Grades 5–8
Are Stars on Fire
earth science · MS-ESS1-1
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Grades 5–8
Integumentary System
life science · MS-LS1-3
Free
Passage
Grades K–2
Farm Machines
science
Free
Passage
Grades 5–8
Is the Sun a Planet
earth science · MS-ESS1-3
$1.50
Passage
Grades 5–8
Why Are Honeybees Important?
science · MS-LS2-4
Free
Passage
Grades 5–8
Why Are Pollinators Important?
science · MS-LS2-4
$1.50
Passage
Grades 3–5
Lungs vs Gills
life science · NGSS 4-LS1-1
$1.50
Passage
Grades 5–8
Reproductive System
life science · MS-LS1-3
$1.50
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Passage
Grades 5–8
Climate Threats to Freshwater Ecosystem
weather and climate · MS-LS2-4
$1.50
Passage
Grades 5–8
The Amazon River
earth science · RI.5.3
$1.50
Passage
Grades 5–8
Determining Earth's Carrying Capacity
science
$1.50
Passage
Grades 3–6
How Fish Breathe
life science
$1.50
Passage
Grades 6–8
Voting Rights Act 1965
us history · D2.HIS.2.3-5
$1.50
Passage
Grades 3–6
Animals with Armor
life science
$1.50
Passage
Grades 6–8
Factories Change America
us history
$1.50
Passage
Grades 3–5
How Heart Pumps Blood
life science · NGSS 4-LS1-1
$1.50
Passage
Grades 5–8
Photosynthesis and Respiration Connection
life science · MS-LS1-6
$1.50
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