6G Science HW#15: Chapter 5.2 and 5.3

The preserved remains or traces of an organism that lived in the past is called _______.

• Fossil

• Sedimentary rock

• Petrified Fossil

• Mold

Layers of particles of soil and rock that are carried by a river to a lake or ocean that settle to the bottom that, over millions of years, form layers and harden is called _______.

• Fossil

• Sedimentary rock

• Petrified Fossil

• Mold

A fossil in which minerals replace all or part of an organism is called _______.

• Fossil

• Sedimentary rock

• Petrified Fossil

• Mold

A hollow space in sediment in the shape of an organism or part of an organism is called _______.

• Fossil

• Sedimentary rock

• Petrified Fossil

• Mold

A fossil that is a copy of an organism’s shape, formed when minerals seep into a mold called _______.

• Fossil

• Cast

• Petrified Fossil

• Mold

A technique used to determine which of two fossils is older is called _____.

• Absolute dating

• Relative dating

• Radioactive Element

• Half-Life

A technique used to determine the actual age of fossils is called _____.

• Absolute dating

• Relative dating

• Radioactive Element

• Half-Life

Unstable elements that decay, or break down, into different elements is called _____.

• Absolute dating

• Relative dating

• Radioactive Element

• Half-Life

The time it takes for half of the atoms in a sample to decay is called _____.

• Absolute dating

• Relative dating

• Radioactive Element

• Half-Life

The millions of fossils that scientists have collected is called ____.

• Fossil Record

• Extinct

• Gradualism

• Punctuated Equilibria