Which can be excluded due to the absence of fossil records?(1 point)
Responses
the shell of a crab
the shell of a crab
a dinosaur's backbone
a dinosaur's backbone
the body of a jellyfish
the body of a jellyfish
the shell of a snail
a dinosaur's backbone
Which best supports the evidence that an asteroid collision may have caused caused the extinction of dinosaurs?(1 point)
Responses
Many dinosaur skeletons are found in one particular rock layer.
Many dinosaur skeletons are found in one particular rock layer.
Rare metal on Earth called Iridium is found in layers where dinosaurs disappeared.
Rare metal on Earth called Iridium is found in layers where dinosaurs disappeared.
Bodies of dinosaurs are only found in craters where asteroid collided.
Bodies of dinosaurs are only found in craters where asteroid collided.
Dinosaur fossil remains are found at the bottom of a body of water.
Rare metal on Earth called Iridium is found in layers where dinosaurs disappeared.
Which is correct about fossils location and age?(1 point)
Responses
Fossils found in lower rock layers are older than fossils found in upper layers.
Fossils found in lower rock layers are older than fossils found in upper layers.
Fossils found in rock layers that have been disturbed are the oldest.
Fossils found in rock layers that have been disturbed are the oldest.
Fossils found in rock layers closest to Earth’s surface are the oldest.
Fossils found in rock layers closest to Earth’s surface are the oldest.
Fossils found in among numerous other fossils are most recent in age.
Fossils found in lower rock layers are older than fossils found in upper layers.
Why are time periods on the geologic time scale not even in length?(1 point)
Responses
They are based on important events that happened in Earth’s history.
They are based on important events that happened in Earth’s history.
They are based on the thickness of the Earth's rock layers.
They are based on the thickness of the Earth's rock layers.
They are based on a different type of calendar used to track Earth’s history.
They are based on a different type of calendar used to track Earth’s history.
They are based on the type of fossils found in rock layers of the Earth.
They are based on important events that happened in Earth’s history.
Which can be excluded from a list of evidence that supports the claim that an asteroid colliding with Earth caused a mass extinction?(1 point)
Responses
Dinosaur fossils are plentiful in one layer of rock and absent in the layer above.
Dinosaur fossils are plentiful in one layer of rock and absent in the layer above.
Single-celled and multicellular organisms are found in layers of rocks on Earth.
Single-celled and multicellular organisms are found in layers of rocks on Earth.
The Chicxulub Crater was discovered on the Yucatan Peninsula of Mexico in 1978.
The Chicxulub Crater was discovered on the Yucatan Peninsula of Mexico in 1978.
The rare metal iridium was found in rocks above and below the line where dinosaur fossils disappeared.