A
What was the science topic for this week?
-geologic time
-rocks and their layers
-Earth's history and timeline using science
A sedimentary rock can be easily identified by looking at __________________.
_________ are the evidence of past life.
(ex. old bones, footprints, teeth)
Fossils
Which time periods on the geologic time scale do scientists show that dinosaurs were roaming the Earth?
Mesozoic Era
Triassic Period
Jurassic Period
Cretaceous Period
Give an example of something you can find as a fossil.
footprints
teeth
dung
eggs
Geologic Time refers to studying which part of the Earth in order to learn more about its history?
the Earth's rock layers
Sedimentary rocks are made of sediment, like dirt and ____________________.
sand
rocks
pebbles
dust
mud
If a species is extinct, is it still living today?
no
Using the Geologic Time Scale, which happened first?
Holocene Period
OR
Eocene Period ??
Eocene Period
Sedimentary, igneous, and metamorphic are all describers of what type of thing on Earth?
rocks
A geologist is a scientist who studies:
a. rocks
b. maps and places
c. earthquakes
a. rocks
True or False:
The rock layer underneath another layer is the oldest rock.
True
True or False:
The rock layer above another layer is the oldest rock.
False
According to the Geologic Time Scale, which time period is most recent ?
Silurian Period
Paleocene Period
Proterozoic Period
Paleocene Period
Are rocks living or not living?
WHY?
not living
Rocks are not made of plant or animal cells.
Rocks do not eat or drink.
Rocks do not reproduce.
The prefix "geo" means ____________.
Earth
Land
Look at the diagram. Show which rock layer is the oldest.
student response
Look at the diagram. Show which rock layer is the youngest.
student response
Using the Geologic Time Scale, name 2 of the 3 eras listed.
(An era is a large chunk of millions of years, multiple time periods)
Cenozoic Era
Mesozoic Era
Paleozoic Era
How many times do scientists guess there may have been a major living things extinction in Earth's history?
6
Share one type of rock you can study.
igneous
metamorphic
Explain why it is important for scientists to study Earth's rock layers.
The rock layers can tell us more about Earth's history, what happened in the past, what living things used to thrive, what happened to species that have gone extinct...
Explain how a sedimentary rock forms its layers.
Weathering (like rain and wind) over time can cause small rocks, dirt, and dust to cover another area of land.
After many years, the new layer of Earth can form a new rock layer.
Describe how the geologic time scale looks different as the periods change through history.
The time scale shows less life at the beginning of Earth's rock layers.
It shows more diversity and change as the layers go up.
Humans are on the top of the time scale.
There are extinctions of species listed on the time scale.
S E D I M E N T A R Y