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Atomic Structure
physical science · MS-PS1-1+2
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“molecule” worksheets and activities
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Covalent Bonds
physical science · MS-PS1-1
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Hydrogen Bonds
physical science · MS-PS1-1
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What Is Air Pressure
weather and climate
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Grades 3–8
What is a Polar Covalent Bond
physical science
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Chemical Bonds
physical science · MS-PS1-1+2
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Particle Model of Matter
physical science · MS-PS1-1+1
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What Mars Rovers Have Discovered
earth and space science · MS-ESS1-3
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Parts of an Atom
physical science · MS-PS1-1+2
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The Cytoplasm: The Cell's Inner World
science
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Grade 6
Aerobic Respiration
life science
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Mass of a Proton
physical science · MS-PS1+3
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Do Protons and Electrons Have the Same Mass
physical science · MS-PS1+3
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What Charge Does a Neutron Have
physical science · MS-PS1+3
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How Many Neutrons Does Hydrogen Have
physical science · MS-PS1+3
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Grades 5–8
What Is the Charge of a Proton
physical science · MS-PS1+3
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Grades 5–8
How Many Valence Electrons Does Oxygen Have
physical science · MS-PS1-2+1
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Grades 5–8
How Many Valence Electrons Does Chlorine Have
physical science · MS-PS1-2+1
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What is an Ionic Bond
physical science
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How to Name Ionic Compounds
physical science
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What are Valence Electrons
physical science
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What is Radioactivity
physical science
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Grades 3–8
What is Radioactive Decay
physical science
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Grade 6
What Is Bioluminescence?
science
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Grade 6
Barnacles and Biofouling
science
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Grade 6
Aortic Pathway
science
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The Idea of the Atom
physical science · MS-PS1-1
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What are Ions
physical science · MS-PS1-1
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Nucleus of the Atom
physical science · MS-PS1-1
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Grades 5–8
How Atoms Differ
physical science · MS-PS1-1
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Grades 5–8
Isotopes
physical science · MS-PS1-1
$1.50
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Grades 5–8
Metallic Bonds
physical science · MS-PS1-1
$1.50
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Grades 5–8
Chemical Bonding
physical science · MS-PS1-1
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Types of Radiation
physical science · MS-PS1-2
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Nuclear Fission
physical science · MS-PS1-1+1
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Nuclear Power Plants
physical science · MS-PS3-4+1
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Grades 5–8
Nuclear Safety and Waste
physical science · MS-PS3-4+2
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Radiocarbon Dating
physical science · MS-PS1-1+1
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Nuclear Fusion
physical science · MS-PS1-1+1
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Internal Structures of Plants
science
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Internal Structures of Animals
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External Structures of Animals
science
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How Animals Sense and Respond
science
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Grades 3–5
Nervous System and Senses
science
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Grades 5–8
Marie Curie and Radioactivity
physical science · CCSS RI.6.3
$1.50
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Grades 3–6
External Structures of Plants
science
$7.99
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Grade 6
Are Plants Autotrophs
life science
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Grades 5–8
Could There Be Life on Enceladus
earth and space science · MS-ESS1-1
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Grades 5–8
Air Temperature: A Key Weather Variable
weather and climate · 7.RI.7.1
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Air Pressure: A Key Weather Variable
weather and climate · 7.RI.7.3
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