California science vocabulary card(1 6) (6)

Grade 6

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ISBN 0-02-284476-7

Vocabulary Cards
Vocabulary Cards help build word knowledge and
understanding of Science Glossary terms by:

• providing an opportunity for vocabulary preview,
review, and reinforcement

• fostering language development skills
• supporting the acquisition of academic language for
English learners
Vocabulary Cards can be placed in your classroom
Science Center.


abiotic factor
(ā’bī ot’ik fak’tәr)

© Macmillan/McGraw-Hill

California Science / 6


Any nonliving part of an ecosystem,
such as water, minerals, sunlight,
air, or soil.
Living things depend upon
the abiotic factors around them
to survive.

abrasion
(ә brā’zhәn)

© Macmillan/McGraw-Hill

California Science / 6


The process that occurs when sand,
stones, and pebbles move and
scrape across Earth’s surface,
acting like sandpaper to pit and
polish the surface.
Scraping a rock against the ground
leads to the abrasion of both the
ground and the rock.


absorption
(ab sôrp’shәn)

© Macmillan/McGraw-Hill

California Science / 6


The process of taking in
radiant energy.
The absorption of light by green
plants powers photosynthesis.

abyssal zone
(ә bi’sәl zōn)

© Macmillan/McGraw-Hill

California Science / 6


The part of the oceanic zone that is
found at depths greater than 2,000
meters (6,562 feet), where there is
no sunlight, it is very cold, and the
water pressure is high.
Photosynthesis does not occur in
the abyssal zone because there is
total darkness.


acidity
(ә sid’i tē)

© Macmillan/McGraw-Hill

California Science / 6


The amount of acid in a substance.
The amount of acidity in a lemon

is higher than in a banana.


acid rain
(as’id rān)

© Macmillan/McGraw-Hill

California Science / 6


Precipitation that contains acidic
components as a result of the
burning of coal and other fossil fuels;
harms soils and water supplies and
can weather statues and buildings.
Acid rain is a serious problem
that affects lakes in parts of
the United States.


aerial roots
(âr’ē әl rüts)

© Macmillan/McGraw-Hill

California Science / 6


Roots that reach out above the

ground for water and sunlight
to nourish the plant.
Since aerial roots never touch the
ground, they get the moisture they
need from the air around them.


air pressure
(âr pre’shәr)

© Macmillan/McGraw-Hill

California Science / 6


The force that air molecules exert
on the objects beneath them; has
a major effect on the weather.
Air pressure is higher at sea level
than it is on top of a tall mountain.


alkalinity
(al’kә lin’i tē)

© Macmillan/McGraw-Hill

California Science / 6

The amount of base in a substance.
Drain cleaners have greater
alkalinity than milk.


alluvial deposit
(ә lü’vē әl di poz’it)

© Macmillan/McGraw-Hill

California Science / 6


A fan-shaped land deposit
at the mouth of a stream.
Alluvial deposits include a wide
range of different particles.


amoeba
(ә mē’bә)

© Macmillan/McGraw-Hill

California Science / 6


A protist found in fresh water,
salt water, and soil that uses
pseudopods to move and eat.

Amoebas are constantly
changing their shape.


amplitude
(am’pli tüd’)

© Macmillan/McGraw-Hill

California Science / 6