4th Grade Abeka - Science Test 7
mineral
A ____________________________ is never man-made.
triangle
A delta is shaped like a _____________________________.
gem
A diamond is a _______________.
topsoil
Erosion is the wearing away of the earth's __________________.
three
Geologists divide rocks into _______________ main groups.
365 1/4 days
One revolution of the earth takes _________________________.
one day
One rotation of the earth takes _____________ _____________.
humus
The decayed material in soil is called _____________________.
rotation
The earth makes one ________________________ every day.
west to east
The earth rotates ___________ _____ ____________.
axis
The earth rotates on its _____________.
sun
The earth rovolves around the ____________.
crust
The earth's ___________________ is solid rock.
mantle
The earth's ____________________ Is made mostly of solid, hot rock.
gravity
The energy in moving water is cause by _____________________,
more
Topsoil is ______________ fertile than subsoil.
the earth is tilted
We have changing season because _______ ____________._____ _______________.
the earth rotates
We have night and day because _______ _____________ _____________.
Clay
________________ hold water in the soil.
Igneous
_______________________ rocks are formed from hot magma
Sedimentary
_____________________________________ rock is formed from the soil deposits made by moving water.
limestone
can be made from shell
slate
can be used to write on
conglomerate
contains pebbles that are cemented together
South America
contains the countries of Brazil, Chile, and Peru
Africa
contains the countries of Egypt and Nigeria
Europe
contains the countries of France, Germany, and Italy
pumice
floats
granite
forms most of the earth's crust under the continents
Australia
is called the "Island Continent"
shale
is made from mud
obsidian
is shiny and black and was used to make arrowheads
Asia
is the largest continent
Antarctica
is the least populated continent
chalk
leaves a white mark
sandstone
made from layers of sand
25,000 miles
the circumference of the earth
8,000 miles
the diameter of the earth
marble
was used to make the Lincoln Memorial