General ScienceUnit 3 Chapters Earth In Time And space And Geology 9-10 Flashcards
What star provides radiant energy to earth, is medium size, and sits on one of the arms of the Milky Way?
The Sun
What galaxy is made up of 100-200 billion stars?
Milky Way
What is the length of time it takes Earth to rotate one full turn on its axis?
One day
What two measurements are used to determine positions on the earth?
Latitude and Longitude
What is the earth ‘s rotation on it’s axis , and it ‘s path around the sun called
It’s orbit
How fast does the Milky Way move through space?
12 miles or 19 kilometers per second
The moon does not give off light of its own. Why then does it appear to shine?
It reflects the light of the sun.
The core of Earth is made of iron and nickel. Is the core heavy or light?
Heavy
The middle of the earth is made up of the core and mantle. What is the outer layer called it is 30 km thick, and made of granite and basalt?
Crust
Is the DENSITY and radius of the Jovian planets larger or smaller than Earth ‘s.
They are less dense, because they are made of Hydrogen, Helium , and Methane gases.
Our solar system is made of a pinwheel of
Stars
The planet that we used to think was farthest from our sun was
Pluto
The shape of Earth is basically spherical and it is lit only in the side facing the
Sun
The standard 3 subdivisions of the day are
24 hours, 60 minutes , 60 seconds
The surface of Earth is divided into units called lines of _ and _.
Longitude and latitude
Differences in time at various points on Earth are caused by the rotation of the earth on it’s
Axis
The farther from the equator that the latitude is, the shorter will be the period of ____ for that latitude.
Daylight
The two points in the earth’s orbit when the earth ‘s axis is positioned so neither pole is pointing toward the sun is called __ and __ equinox
Vernal and Autumnal Equinox
The earth ‘s size was first estimated by
Eratosthenes
Name the 3 layers of the earth.
Crust, mantle, core
What could have caused the magnetic field of the earth?
Slow movement of the earth’s magnetic core
The planets which have a mass and radius much larger than Earth are called
Jovian
The sun’s mass and radius are much larger than –
Earth
A solar eclipse occurs when the moon passes directly between the ___ and the ___.
Earth , Sun
Planet farthest from the sun
Neptune
Planet nearest the sun
Mercury
Largest planet
Jupiter
Smallest planet
Mercury
Planet nearest Earth .
Venus
The mass of which planet is closest to the mass of the earth
Venus
When it is summer in South America it is winter in
North America
During the winter the sun ‘s rays strike at a greater angle than during the
Summer
Is the Milky away the only galaxy in the universe ?
No
Is the sun a star?
Yes
What layer of the earth is made up of hot, molten rock whose movements cause volcanoes and earthquakes?
Core
What is the thickest layer of the earth, about which little is known?
Mantle
What layer of the earth do scientists this is made up of iron?
Core
The. 3 major rock types are classified by the way they
We’re formed
Supply the missing term: magma… lava…___ ___
Sedimentary Rock
Rocks such as sandstone which are formed from particles of other rocks are called
Sedimentary rocks
Rocks such as marble which are formed by great vibrations in pressure and temperature are ___ rocks
Metamorphic
Mini earls are generally made up of __.
Crystals
List 2 examples of minerals.
Diamonds, salt
Volcanic activity , lifting and folding of the earth’s crust, and plateau erosion all describe how ___ are formed.
Mountains
Moving bodies of ice are called
Glaciers
