How people are changing Earth's systems
Earth and Space Science
PencilGoFree 9th Grade Worksheets
4,886 different free sheets for 9th grade: 281 topics across math, reading, science, social studies, each at three levels in 6 versions with an answer key. Pick a subject, or search.
Showing 97–130 of 130 topics, each at three levels in 6 versions
How stars make the elements
Earth and Space Science
How the solar system formed
Earth and Space Science
How thunderstorms, tornadoes and hurricanes form
Earth and Space Science
How water's properties change rock and land
Earth and Space Science
How we know past climates: ice cores, tree rings, sediments
Earth and Space Science
Judge and improve a solution that reduces human impact
Earth and Space Science
Kepler's three laws of planetary motion
Earth and Space Science
Layers of the atmosphere
Earth and Space Science
Optional. Scientific ideas about how life began
Earth and Space Science
Orbital cycles and ice ages
Earth and Space Science
People, resources and biodiversity: reading a model
Earth and Space Science
Pressure systems, fronts and weather maps
Earth and Space Science
Put rock layers in order
Earth and Space Science
Read a Hertzsprung-Russell diagram
Earth and Space Science
Read topographic and geologic maps
Earth and Space Science
Redshift and the expanding universe
Earth and Space Science
Seafloor spreading and why ocean crust is young
Earth and Space Science
Sunspots, the solar cycle and space weather
Earth and Space Science
Surface ocean currents and the Coriolis effect
Earth and Space Science
Telescopes and space missions
Earth and Space Science
The carbon cycle across rock, ocean, air and life
Earth and Space Science
The evidence for the Big Bang
Earth and Space Science
The geologic time scale and the great extinctions
Earth and Space Science
The greenhouse effect
Earth and Space Science
The Sun's layers and the fusion that powers it
Earth and Space Science
The Sun's life from start to finish
Earth and Space Science
Warming oceans, rising seas and melting ice
Earth and Space Science
What a star's light shows: spectra and color
Earth and Space Science
What forms at each kind of plate boundary
Earth and Space Science
What meteorites, Moon rocks and ancient crystals tell us
Earth and Space Science
What sets a region's climate
Earth and Space Science
Why the fossil record has gaps, and what fossils say about past environments
Earth and Space Science
Why the tides rise and fall
Earth and Space Science
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