Study Guide for Astronomy

Which scientist proposed three laws of planetary motion?
Johannes Kepler
The true shape of planetary orbits was discovered by…
Johannes Kepler
What is the most important safety rule?
Follow the teacher’s instructions
When is the daily tidal range greatest?
The greatest tidal range occurs during Spring tides due to Earth-sun-moon alignment
The center of mass where two or more celestial bodies orbit each other is known as…
Barycenter
Which part of the Electromagnetic spectrum is slowest?
radio waves
The source of the sun’s energy is…
nuclear fusion
Density is measured in which unit?
g/ml or g/cm^3
Seasons are caused by…
tilting of earth on its axis
The geocentric model of the universe stated that…
all known celestial bodies orbited the Earth
What is the shape of the planets’ orbit?
the orbit is elliptical
The shape of Earth is described as…
an oblate spheroid or ellipsoid, not a true sphere
The movement of the axis of a rotating body or a wobble is known as…
Revolution (I think nutation)
What tool do you use to measure mass?
balances, triple beam balances, electronic scales
Which step of the scientific method is information obtained through the senses?
Step 1: Define problem
Plants use sunlight to produce sugar using chlorophyll thorough a process known as…
photosynthesis
The energy of a photon is related to its…
wavelength
The movement in which Earth’s axis slowly but continuously points in different directions is known as…
precession
What are the three types of galaxies?
Elliptical, Spiral, and Irregular
The turning or spinning of a body on its axis is known as…
rotaion
Earth’s axis continuously points in different direction, a movement known as…
precession
What are the three types of galaxies?
Spiral, elliptical, & irregular
The turning or spinning of a body on it’s axis is known as…
rotation
According to the third law of planetary motion, the period of revolution of a planet is related to the planet’s…
orbital period
The gravitational forces of the moon and sun cause what event?
Tides
Gamma rays, X-rays, visible light, and radio waves are all types of…
electromagnetic waves
Mass is measured in which unit?
g, kg, mg
The study of the property of light that depend on the wavelength is known as…
spectroscopy
The smallest daily tidal range occurs during which type of tide?
Neap tide
According to the big bang theory, the universe began about…
13.7 billion years ago
What field located on Earth helps protect us form harmful solar radiation rays?
ozone layer
Our galaxy is called…
The Milky Way
Volume is measured in what unit?
L, mL, cm^3, cc(ml)
Which tidal pattern has two high tides and two low tides each day?
Semi-Diurnal
What movement of Earth is responsible for night and day?
Rotation
Which law states that each planet revolves so that an imaginary line connecting it to the sun sweeps over equal areas in equal time intervals?
Kepler’s 2nd Law of Planetary Motion
What is the most important lab safety procedure?
Follow instructions as directed by the teacher
Which scientist was the first to use the telescope in astronomy?
Galileo Galilei
Earth is closest to the sun at a point called…
perihelion
Why does earth experience precession?
Earth axis maintains at the same angle of tilt. But, the direction in which the axis points continually changes. The change resembles a spinning top or wobble
How does Earth move through space?
Rotation, revolution, precession
What chemical reactions produce the sun’s energy?
Nuclear fusion
How is solar energy essential to plants?
Solar energy is changed into chemical energy thorough photosynthesis
How does the sun’s energy affect food webs on Earth?
Plants use sunlight to produce sugar through the actions of chlorophyll
Based o the observed red shifts in the spectral lines of distant galaxies, astronomers conclude that…
space between galaxies is expanding
Light seen in space is known as…
a photon