U-Science-Gr7-Unit1-CBT Alfred Wegener observed that coastlines of continents appeared to match up and hypothesized that all continents were once joined in a single landmass and have since drifted apart. This hypothesis became known as
continental drift. Evidence supporting which statement was needed to accept continental drift?
Seismic waves from one earthquake can be recorded at many points on Earth's surface.
Earth's surface and arrangement of continents has changes over long periods of time.
Volcanoes and earthquakes often occur in similar locations.
Earth's interior contains layers of different states of matter.