Read a Hertzsprung-Russell diagram
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 241–281 of 281 topics, each at three levels in 6 versions
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
Birth rates, death rates and the demographic transition
World Geography
Choose the right map, and see what each projection distorts
World Geography
Earthquakes, hurricanes, floods and droughts: where and why
World Geography
Farming around the world, and where food comes from
World Geography
How cities grow: urban, suburban and rural patterns
World Geography
How languages and customs spread
World Geography
Kinds of work and how geographers measure development
World Geography
Plate tectonics and how landforms are made
World Geography
Read population pyramids
World Geography
Read satellite images and before-and-after photos
World Geography
Rivers, watersheds and groundwater, and who uses the water
World Geography
Scale, distance and exact location
World Geography
Shipping routes, canals and chokepoints
World Geography
What makes climate, and the world's biomes
World Geography
Where resources are, and renewable vs nonrenewable energy
World Geography
Why people migrate: push and pull factors and their effects
World Geography
Work out the time anywhere with a time-zone map
World Geography
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