ether;s place mat Flashcards
True or False: Earth is the only planet known to support life.
True.
Fill in the blank: The Earth orbits the Sun in an elliptical shape called a _____ .
trajectory.
What percentage of the Earth’s surface is covered by water?
Approximately 71%.
Which layer of the Earth is liquid?
The outer core.
What is the Earth’s atmosphere primarily composed of?
Nitrogen (78%) and Oxygen (21%).
Multiple Choice: What is the primary source of energy for the Earth?
The Sun.
What is the approximate age of the Earth?
About 4.5 billion years.
True or False: The Earth has one natural satellite.
True.
What is the Earth’s rotation period?
Approximately 24 hours.
Fill in the blank: The _____ is the layer of gases surrounding the Earth.
atmosphere.
What is the Earth’s position in the solar system?
The Earth is the third planet from the Sun.
What are tectonic plates?
Large sections of the Earth’s crust that move and interact.
Multiple Choice: Which of the following is NOT a layer of the Earth?
Atmospheric layer.
What is the main cause of seasons on Earth?
The tilt of the Earth’s axis.
True or False: The Earth has a magnetic field.
True.
What is the name of the supercontinent that existed about 335 million years ago?
Pangaea.
Fill in the blank: The Earth’s _____ is responsible for its weather and climate.
atmosphere.
What is the term for the boundary where two tectonic plates meet?
Plate boundary.
Multiple Choice: Which layer of the Earth is solid?
The crust.
What is the primary component of the Earth’s core?
Iron.
True or False: Earth is the only planet in the solar system with liquid water on its surface.
True.
What phenomenon is caused by the gravitational pull of the Moon on Earth?
Tides.
Fill in the blank: The _____ is the layer of the Earth between the crust and the outer core.
mantle.
What is the concept of ‘geological time’?
The time scale used by geologists to describe the timing and relationships of events in Earth’s history.
