Rock Layers
Fossils
Geologic Time Scale
Relative Dating
Mystery Science
100
Which layers are usually the oldest in an undisturbed rock formation?
What is the bottom layers?
100
What is a fossil?
What are the remains or impression of a prehistoric organism preserved in rocks
100
How old is Earth estimated to be?
What is 4.6 billion years?
100
What principle says younger rocks are on top?
What is law of Superposition?
100
What happens to a wave’s frequency when its wavelength increases?
What is frequency decreases?
200
Which type of rocks contains fossils?
What is sedimentary rocks?
200
Which fossil is older—one in the bottom layer or one at the top?
What is the one at the bottom?
200
What does the geologic time scale divide Earth’s history into?
What is Eons, eras, periods, epochs?
200
How can faults affect relative dating?
What are they can shift layers and complicate the timeline?
200
Why couldn’t students hear music from a soundproof room?
What is the wavelengths are absorbed?
300
What can cause rock layers to be out of order?
What are faults?
300
What do fossils in rock layers help scientists learn?
What is about organisms that lived in the past and how Earth has changed?
300
What type of evidence helps scientists create the geologic time scale?
What are rock layers and fossil records?
300
What is the relative age of a fault cutting through layers A–E?
What is older than E but younger than A,B, and C?
300
What do all living things have in common?
What is both are living organisms and made of cells?
400
What is the principle of cross-cutting relationships?
What is a rock or feature (like magma or a fault) that cuts through other rocks is always younger than the rocks it cuts across?
400
What are index fossils?
What are special clues that help scientists figure out the age of rock layers and compare them across different places because they lived for a short time and were common?
400
When did humans first appear on the geologic timeline?
What are very recently, near present day?
400
What are the four divisions of the Geologic Time Scale?
What are Precambrian, Paleozoic, Mesozoic and Cenozoic?
400
How is thermal energy transferred from warm air to cold water?
What is heat moved from warm to cold?
500
What law do scientists use to determine the sequence of rock deposition without exact dates?
What is the Law of Superposition?
500
What Era would you find dinosaur fossils in?
What is Mesozoic?
500
What major events are used to separate divisions in the geologic time scale?
What is mass extinctions?
500
What is known as the the end of a group of organisms, usually a species?
What is extinction?
500
What is thermal energy?
What is the energy of temperature of matter?