Vocabulary
Lessons 1-3
Lessons 1-3
a gaseous body much larger than anything else in the solar system.
Sun
True or False: These first four planets (Mercury, Venus, Earth, & Mars) are all terrestrial planets.
True
____ of sun’s mass is hydrogen.
¾
Astronomers use instruments and tools that detect ________________ to collect data and produce images of objects in space.
electromagnetic radiation
It is now known as a Dwarf Planet.
Pluto
is round, orbits the sun, and has cleared out the region of the solar system along its orbit.
planet
True or False: These four planets (Jupiter, Saturn, Earth, Pluto) are all giant gas planets.
False
_____ of sun’s mass is helium.
¼
light that spreads out to make a range of different colors with different wavelengths.
Spectrum
Venus is the _________ planet in the sky.
brightest
the inner layer of the sun's atmosphere
photosphere
The sun accounts for about 99.85% of the entire mass of the _____________.
solar system
Interior is made up of the core, radiation zone and ____________.
convection zone
Collect and focus different types of electromagnetic radiation including visible light.
Telescopes
Features that can be seen on the Sun
•Sunspots
•Prominences
Solar flares
areas of plasma that are cooler than the plasma around them.
sunspots
Temperature and pressures become so high that hydrogen atoms combined to form _____________.
helium
Eruptions that occur when the loops in sunspot regions suddenly connect, releasing large amounts of magnetic energy are known as
solar flares
More than half of all stars are members of groups of two or more stars are called
star systems
Detect radio waves from objects in space.
Radio Telescopes
energy that can travel in the form of waves.
electromagnetic radiation
There are ________ planets in our solar system that orbit around the Sun.
nine
the outer layer that looks like a white halo around the sun; means “crown” this is also known as the
corona
Star systems with two stars are called double stars or _____________
binary stars
A piece of transparent glass, curved so that the middle is thicker than the edges.
Convex lens