文档介绍：Grade 5
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© Macmillan/McGraw-Hill California Science / 5
ard_1- 2 1/31/06 12:20:57 AM
Published by Macmillan/McGraw-Hill, of McGraw-Hill Education, a division of The McGraw-panies, Inc.,
Two Penn Plaza, New York, New York 10121.
Copyright © by Macmillan/McGraw-Hill. All rights reserved. No part of this publication may be reproduced or distributed in
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Companies, Inc., including, but not limited to, network storage or transmission, or broadcast for distance learning.
Printed in Mexico
1 2 3 4 5 6 7 8 9 078 09 08 07 06
ISBN 0-02-284475-9
1 2/2/06 4:20:45 PM
absorption
(әb’sôrp’shәn)
© Macmillan/McGraw-Hill California Science / 5
ard_1- 2 1/31/06 12:20:57 AM
A process in which something
is taken in and used, as by
a cell.
The absorption of nutrients
into the body takes place in
the small intestine.
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acid
(aśid)
© Macmillan/McGraw-Hill California Science / 5
ard_1- 4 1/31/06 12:20:57 AM
A substance that tastes sour,
sharp, or biting.
Vinegar, oranges, and lemons each
contain an acid.
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acidity
(ә sid’ i tee)
© Macmillan/McGraw-Hill California Science / 5
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The strength of
a acidic solution
Weak acids have low acidity.
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aerobic
(er’ō’bik)
© Macmillan/McGraw-Hill California Science / 5
ard_1- 8 1/31/06 12:20:58 AM
Having to do with the
use of oxygen.
Aerobic exercise, such as running
or swimming, strengthens
the lungs and heart.
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aerial root
(â