4th Grade Abeka - Science Test 7

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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


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