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measuring matter
terms to know
21
Science
7th Grade
09/26/2009

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Term
matter
Definition
something that has mass and takes up space
Term

International system of units (S.I.)

 

Definition
standard units of measure in science
Term
the metric system
Definition

another name for S.I.

 

Term
meter
Definition
basic unit of measure of length in S.I.
Term

tools used to measure length in S.I.

 

Definition
ruler, calipers, meter stick, tape measure
Term
mass
Definition
amount of matter in a given space
Term
weight
Definition
measure of the pull of gravity on an object
Term
gram
Definition
basic unit of measure for mass in S.I.
Term
tools used to measure mass in S.I.
Definition

triple-beam balance, spring scale, electronic balance

 

Term
volume
Definition
the amount of space taken up by an object
Term
liter
Definition
basic unit of measure of volume in S.I.
Term
tools to measure volume in S.I.
Definition
graduated cylinder, beaker, ruler, calipers, tape measure, flask
Term
formula for volume of a rectangular prism
Definition

length × width × height

(V = lwh)

Term
meniscus
Definition

the curved line formed by a liquid in a container

[image] 

Term
Where do you read the meniscus?
Definition
at the bottom of the curved line
Term
water displacement
Definition
procedure for finding volume of irregular shaped objects
Term
How do you use water displacement to find the volume of an irregular object?
Definition
  1. add H2O to container, read & record amount of H2O (R1)
  2. add object to container, read & record H2O level again (R2)
  3. subtract initial reading from final reading
  4. record & label your answer

(V = R2 - R1)

Term
density
Definition
relationship between an object's mass & its volume
Term
How many milliters (mL) are there in one cubic centimeter (cm3)?
Definition

 

1 cm3 = 1 mL

Term
formula for density
Definition

mass ÷ volume

(D = m/v)

Term
unit label used for density
Definition

grams/cubic centimeters

(g/cm3)

or

grams/milliliters

(g/mL)

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