Geologic Time, Fossils, Impact Events

What are organisms called that make their own food?

• Producers

• Consumers

• Decomposers

• Paleontologists

What are organisms called that rely on plants for food?

• Producers

• Consumers

• Decomposers

• Paleontologists

What is the role of decomposers in food webs?

• They make their own food

• They rely on plants for food

• They obtain energy from wastes and dead plants and animals

• They study fossils

What are body fossils?

• Actual organisms or some part of them

• Imprints of organisms or some part of them

• Trace fossils of organisms' life activities

• Fossils of body parts that have dissolved away

What are trace fossils?

• Actual organisms or some part of them

• Imprints of organisms or some part of them

• Traces of an organism's life activities

• Fossils of body parts that have dissolved away

What conditions are necessary for fossilization to occur?

• Being buried and decayed

• Being moved to a place where it can be buried

• Being buried and avoiding decay

• Being exposed to sunlight

Which sedimentary rocks are the most fossiliferous?

• Limestones

• Shales

• Sandstones

• Conglomerates

What does the fossil record show about the extent of geologic time?

• Processes have been operating on Earth for millions of years

• Processes have been operating on Earth for billions of years

• Processes have been operating on Earth for thousands of years

• Processes have been operating on Earth for hundreds of years

How does an absolute date differ from a relative date?

• relative dates are typically younger

• relative dates have number values

• Absolute dates are expressed as "younger" or "older" than something

• Absolute dates are expressed in years before present

Which division of geologic time is the longest?

• eon

• era

• period

• epoch