Scienc3 Flashcards
(25 cards)
What phase begins the moon cycle?
New moon
What term describes the visible portion of the moon increasing?
Waxing
What term describes the visible portion of the moon decreasing?
Waning
What is the Aurora Borealis?
Northern Lights
What is the Aurora Australis?
Southern Lights
What are solar flares?
Large quantities of gas and charged particles released into space
What is solar wind?
Steady stream of particles (electrons and protons) emitted by the sun
Why is the sun important for life on Earth?
It allows plants and cyanobacteria to capture energy via photosynthesis
How many solar eclipses can occur in a year?
2-5
How many lunar eclipses can occur in a year?
2-5 total eclipses
What causes a lunar eclipse?
When the Moon passes through Earth’s shadow
Why are lunar eclipses more common than solar eclipses?
They can be viewed from anywhere on Earth where the moon is visible
What negative effects can solar activity have on technology?
It can damage satellites and disrupt communications
What radiation risks do astronauts face from the sun?
High doses of radiation during space walks or through spacecraft walls
What gravitational force keeps the Earth in orbit around the sun?
Gravity
What causes tides on Earth?
The gravitational force exerted by the moon
What is a solar eclipse?
When the shadow of the Moon falls on the Earth
What is revolution in an astronomical context?
The orbit around the Sun
How long does it take for the Moon to complete one revolution around Earth?
29.5 days
What is the angle of Earth’s tilt?
23.5 degrees
What causes the seasons on Earth?
Earth’s tilt
What are the solstices?
Longest and shortest days of the year
What are equinoxes?
When there are equal daylight and night hours
Fill in the blank: A _______ eclipse occurs when the Moon passes between the Sun and Earth.
Solar
