Earth Flashcards
(25 cards)
What defines an Earthlike planet?
An Earthlike planet is defined by its ability to support liquid water on its surface and has conditions similar to those on Earth.
True or False: All Earthlike planets are located in the habitable zone of their star.
True
Fill in the blank: The region around a star where conditions may be suitable for life is known as the _____ zone.
habitable
Which of the following is NOT a characteristic of Earthlike planets? A) Rocky composition B) Thick atmosphere C) Gas giant
C) Gas giant
What is the primary factor that determines whether a planet can maintain liquid water?
The distance from its star, which affects temperature and atmospheric pressure.
Name one method used to discover Earthlike planets.
The transit method, which detects dips in a star’s brightness when a planet passes in front of it.
True or False: Venus is considered an Earthlike planet.
False, while Venus is similar in size and composition, its extreme conditions make it inhospitable.
What is the significance of the term ‘Goldilocks zone’?
It refers to the habitable zone around a star where conditions are ‘just right’ for liquid water to exist.
List two criteria that an exoplanet must meet to be classified as Earthlike.
1) Presence of liquid water 2) Rocky surface
Which space telescope has been instrumental in finding Earthlike planets?
The Kepler Space Telescope
What is the Earth’s primary source of energy?
The Sun
True or False: The Earth’s atmosphere is composed primarily of oxygen.
False
Fill in the blank: The Earth’s crust is divided into several large pieces called __________.
tectonic plates
Which layer of the Earth is liquid and composed mainly of iron and nickel?
Outer core
What phenomenon is caused by the movement of tectonic plates?
Earthquakes
Multiple Choice: Which gas is the most abundant in the Earth’s atmosphere? A) Carbon Dioxide B) Nitrogen C) Oxygen D) Argon
B) Nitrogen
What is the effect of the Earth’s axial tilt on seasonal changes?
It causes the seasons to change.
True or False: The Earth’s magnetic field protects it from solar winds.
True
What is the term for the gradual warming of the Earth due to increased greenhouse gases?
Global warming
What major consequence results from deforestation on Earth?
Loss of biodiversity
What is the third planet from the Sun?
Earth
True or False: Earth is the only planet known to support life.
True
Fill in the blank: The Earth’s atmosphere is composed mainly of ______.
Nitrogen
Which layer of the Earth is liquid?
Outer core
