Chapter 14 Quiz

A type of fossil made by a thin object such as a leaf or feather is called a (an):

• Relative Dating
• Imprint
• Mold
• Cast

Scientists theorize that the first organisms on Earth were probably most like archaebacteria because they:

• have nuclei.
• need oxygen.
• can survive very harsh conditions.
• have cell membranes.

Using the fossil record, scientists have calculated that life probably first evolved on Earth about:

• 3.5 million years ago.
• 100 million years ago.
• 3.5 billion years ago.
• 4.6 billion years ago.

What type of dating is believed to be the most accurate for determining the age of fossils?

• Biological Dating
• Geologic Dating
• Radioactive Dating
• Relative Dating

Oparin's hypothesis claimed that ___________ and ____________ provided the energy for the first lifeforms to evolve on the Earth.

• Exercise and Lightning
• Food and Sunlight
• Salt and Water
• Sun and Lightning

Examples of fossils include preserved:

• body parts.
• eggs.
• footprints.
• all of these.

The first organisms on Earth were most like today's:

• bacteria.
• DNA molecules.
• eukaryotes.
• multi-cellular organisms

The length of time required for half of the radioactive atoms to decay in a sample is its:

• half-life.
• period.
• radioactive date.
• relative date.

Why did oceans not exist on the Earth nearly 4 billion years ago.

• No water molecules were present.
• There was no oxygen gas in the atmosphere.
• Water remained a gas because Earth was very hot.
• Water existed as ice because Earth was very cold.

Miller and Urey’s experiments attempted to demonstrate:

• how Earth first formed.
• whether DNA or RNA evolved first.
• how the simplest life compounds formed.
• how the deepest part of Earth formed.