Geologic Time
Grade 6 Science Worksheets
Earth is very, very old!
Earth is at least 4.5 billion years old! That’s a long period of time. There are many terms to measure the earth’s timeline– Eons, Eras, Periods, Epochs, Ages. They are used to measure geologic time in the earth’s history.
Eons go right back in time to when earth and moon were formed. They typically last for hundreds of millions of years each. Eons are divided into Eras, which are further divided into Periods, Epochs, and Ages.
Schedule a Free session to clear worksheet doubts
No credit card required, no obligation to purchase.
Just schedule a FREE Sessions to meet a tutor and get help on any topic you want!
Did you watch “Jurassic Park”? That word came from the Jurassic Period180 million years ago when dinosaurs ruled the earth. The Jurassic period was during the Mesozoic Era which started 240 million years ago! By contrast, the earliest ancestors of human beings first appeared on earth only 5-7 million years ago.
Did you enjoy the “Ice Age” movies? The last Ice Age, when glaciers covered most of earth, was around 2.6 million years ago.
The progress of human civilization is often defined in terms of the Stone Age, Bronze Age and Iron Age, based on when humans used these materials to build homes and tools.
Personalized Online Tutoring from eTutorWorld
eTutorWorld offers affordable one-on-one live tutoring over the web for Grades K-12, Test Prep help for Standardized tests like SCAT, CogAT, MAP, SSAT, SAT, ACT, ISEE and AP. You may schedule online tutoring lessons at your personal scheduled times, all with a Money-Back Guarantee. The first one-on-one online tutoring lesson is always FREE, no purchase obligation, no credit card required.
For answers/solutions to any question or to learn concepts, take a FREE TRIAL Session.
No credit card required, no obligation to purchase.
Just schedule a FREE Sessions to meet a tutor and get help on any topic you want!
How do we know Earth’s History?
By studying Rocks and Fossils!
The history of earth is recorded in the rocks on the surface of earth, known as its Crust. Rocks have been formed, worn away, and re-formed right from the creation of the planet. These rocks undergo natural processes of Weathering and Erosion, typically due to wind and rain, to form Sediments. Sediments accumulate in layers known as Strata. Geologists dig up rock layers and study their composition to understand the nature of earth in the past.
Many rocks contain Fossils that reveal the history of life on earth. Fossils are preserved life forms of plants and animals. Imagine that an animal (maybe a dinosaur) fell and drowned in soft mud millions of years ago. The body of the animal would have rotted away but its bones would be preserved in the mud and protected by layers of sedimentary rock deposited on top. Even plants can be found preserved in this manner. Geologists dig up these fossils and study them to understand life on earth in the past.
Check Point
- How old is earth estimated to be?
- Dinosaurs ruled earth during the _______.
- The last Ice Age was ______ years ago.
- Earth’s history can be studied from ______ and ______.
- Sediment accumulates in layers known as ______.
Answer Key
- 5 billion years
- Jurassic Period
- 6 million
- Rocks, Fossils
- Strata
Schedule a Free session to clear worksheet doubts
No credit card required, no obligation to purchase.
Just schedule a FREE Sessions to meet a tutor and get help on any topic you want!
Learn more about Scientific Method and other important topics with 7th Grade Science Tutoring at eTutorWorld. Our expert science tutors break down the topics through interactive one-to-one sessions. We also offer the advantage of customized lesson plans, flexible schedules and convenience of learning from home.
Pricing for Online Tutoring
| Tutoring Package | Validity | Grade (1-12), College |
|---|---|---|
| 5 sessions | 1 Month | $124 |
| 1 session | 1 Month | $25 |
| 10 sessions | 3 months | $239 |
| 15 sessions | 3 months | $354 |
| 20 sessions | 4 months | $449 |
| 50 sessions | 6 months | $1049 |
| 100 sessions | 12 months | $2049 |
6th Grade Free Worksheets
- Inquiry process
- Nature of Science
- Scientific Inquiry
- Inquiry, Analysis and Problem Solving
- Ethical Practices
- Science and Society
- Biotic and Abiotic Factors
- Impact of Organisms
- Adaptation
- Spheres of Earth
- Natural Resources
- Environmental Issues
- Conservation of Earth
- Understanding Technology
- Abilities To Do Technological Design
- Structure of Earth
- Solar System
- Rocks and Fossils
- Earth Systems
- Plate Tectonics
- Evolution
- Magnetic Field of Earth
- Geologic Time
- Materials and Processes That Shape a Planet
- Astronomy
- Ecology
- Energy
- Kinetic and Potential Energy
- Energy Transfer
- Matter and its Structure
- States of Matter
- Physical and Chemical Changes
- Force and Motion
- Electricity and Magnetism
- Wave Interactions
- Sound
- Light
- Introduction to Life Science
- The Origin & History of Life On Earth
- Plant and Animal Cells
- Parts of a Cell
- The Cell Cycle
- How Living Organisms Get Energy
- Classification of Organisms
- How Plants Grow & Reproduce
- The Human Respiratory System
- The Human Cardiovascular System
- The Human Digestive System
- The Human Endocrine Systems
- The Human Nervous System
- The Human Muscular System
- The Human Skeletal System
Images Credit:
https://cdn.pixabay.com/photo/2015/05/15/04/05/geological-time-spiral-767821_1280.png
https://storage.needpix.com/rsynced_images/dinosaurs-2901031_1280.jpg
https://upload.wikimedia.org/wikipedia/commons/thumb/e/e6/Ice_age_fauna_of_northern_Spain_-_Mauricio_Ant%C3%B3n.jpg/1200px-Ice_age_fauna_of_northern_Spain_-_Mauricio_Ant%C3%B3n.jpg
https://www.open.edu/openlearn/sites/www.open.edu.openlearn/files/styles/share_img/public/ole_images/nature/fossils-extinct-creatures/generic-fossil/generic%20fossil.jpg?itok=LuOH9fTS
