Which statement explains why ammonites are a good example of an index fossil?(1 point) Responses Ammonites existed for a relatively limited period of time. Ammonites existed for a relatively limited period of time. Ammonites existed in a small geographic area. Ammonites existed in a small geographic area. Ammonites existed long before the dinosaurs. Ammonites existed long before the dinosaurs. Ammonites existed only in the oceans.
The statement "Ammonites existed for a relatively limited period of time" is the correct explanation for why ammonites are a good example of an index fossil.
What is the theory that describes the movement of landmasses on Earth’s surface?(1 point) Responses subduction subduction divergence divergence continental drift continental drift plate tectonics
The correct theory that describes the movement of landmasses on Earth's surface is plate tectonics.
How does the fern Glossopteris provide evidence for the movement of the continents?(1 point) Responses It lived at the same time as Lystrosaurus. It lived at the same time as Lystrosaurus . It was found on many continents. It was found on many continents. It is the oldest plant on Earth. It is the oldest plant on Earth. It existed in the Permian period.
The statement "It was found on many continents" is the correct explanation of how the fern Glossopteris provides evidence for the movement of the continents. This indicates that the continents were once connected in a way that allowed the fern to spread across them.
Which is a result of Earth’s magnetic poles reversing over time?(1 point) Responses magma rising to the ocean floor at mid-ocean ridges magma rising to the ocean floor at mid-ocean ridges distinct bands in rocks that contain magnetic particles distinct bands in rocks that contain magnetic particles volcanoes occurring at tectonic plate boundaries volcanoes occurring at tectonic plate boundaries high amounts of iron found in ocean rocks
The correct result of Earth's magnetic poles reversing over time is "distinct bands in rocks that contain magnetic particles." This occurs because as the Earth's magnetic field changes, the magnetic minerals in rocks align themselves in different directions, creating bands of alternating magnetic orientations in the rocks. This phenomenon is known as magnetic polarity reversal and is used as evidence for plate tectonics and the movement of continents.
How are earthquakes at continental plate boundaries different from earthquakes at mid-ocean ridges?(1 point) Responses They are shorter in duration. They are shorter in duration. They begin closer to Earth’s surface. They begin closer to Earth’s surface. They begin deeper in Earth’s crust. They begin deeper in Earth’s crust. They are longer in duration.
The statement "They begin deeper in Earth's crust" is the correct difference between earthquakes at continental plate boundaries and earthquakes at mid-ocean ridges. Earthquakes at continental plate boundaries typically occur at deeper depths within the Earth's crust compared to earthquakes at mid-ocean ridges.
Which describes ocean rocks that are found near mid-ocean ridges?(1 point) Responses They are older and form through the cementation of sediments. They are older and form through the cementation of sediments. They are younger and form through the cooling of magma. They are younger and form through the cooling of magma. They are older and form through the cooling of magma. They are older and form through the cooling of magma. They are younger and form through the cementation of sediments.
