Study Guide for Astronomy

Johannes Kepler
Using Tycho Brahe’s data, which scientist proposed three laws of planetary motion.
Johannes Kepler
The true shape of planetary orbits was discovered by.

Follow teachers instructions
What is the most important safety rule?
Spring tides
When is the daily tidal range greatest?
The center of mass where two or more celestial bodies orbit each other is known as.
Nuclear Fusion
The source of the sun’s energy is
Mass per unit volume
Density is measured in which unit?
Tilting of the earth unit axis (23.5 degrees)
Seasons are caused by
Orbit earth
The Geocentric model of the universe stated that they
What is the shape of a planet’s orbit?
Oblate spheroid or ellipsroid instead of a sphere
According to the article, the shape of the Earth is described as
The movement of the axis of a rotating body or a wobble is known as
What tool do you use to measure mass?
Define Problem
In which step of the scientific method is information obtained through the senses?
Plants use sunlight through the actions of the chlorophyll through a process known as
Wave length
The energy of a photon is related to its
Earth’s axis slowly but continuously points in different directions, a movement known as
Spiral, Elliptical, Irregular Galaxies
What are the three types of galaxies?
The turning or spinning of a body on its axis is known as
Space between galaxies is expanding
Based on the observed red shifts in the spectral lines of distant galaxies, astronomers conclude that
Orbital Period
According to the third law of planetary motion, the period of revolution of a planet is related to the planet’s
The gravitational forces of the moon and the sun cause this event.
Electromagnetic Radiation
Gamma rays, X-rays, visible light,and radio waves are all types of
Mass is measured in which unit?
The study of the properties of light that depend on the wavelength is known as
The smallest daily tidal range occurs during which type of tide?

7 billion years ago

According to the big bang theory, the universe began about
Ozone Layer
What field located on Earth helps protect us from harmful solar radiation rays?
Milky Way Galaxy
Our galaxy is called the
Light seen in space is known as
Volume is measured in what unit?
Which tidal pattern has two high tides and two low tides each day?
The main results of Earth’s rotation are day and night.
What movement of Earth is responsible for night and day?
The 2nd Law
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?
Always read teacher’s instructions
What is the most important lab safety procedure?
Galileo Galilei
Which scientist was the first to use the telescope in astronomy?
Earth is the closest to the sun at a point called
Earth’s axis maintains approximately the same angle of tilt.But the direction in which the axis points continually changes.As a result the axis points a circle on the sky.This movement is similar to the wobble of the spinning top.

Why does Earth experience precession?
A.Rotation-Spinning on the body of the axis. B.Motion of the body. C.Slight movement over a period.
How does Earth move through space?
Nuclear Fusion
What chemical reactions produce the sun’s energy?
Solar energy is changed into chemical energy through photosynthesis.
How is solar energy essential to plants?
Plants use sunlight to produce sugar through the actions of the chlorophyll.
How does the sun’s energy affect food webs on Earth?