SCI - EXAM 1

Density (def.)

measure of the amount of matter (mass) that can fit in a given space (volume)

Density (alt.)

The ratio of mass of substance to it’s volume

Mass (def.)

Amount of matter of a object/substance

Volume (def.)

Amount of space an object/substance occupies

Matter (def.)

the atoms and molecules of every substnace

Volume (ques.)

Space occupies

Mass (ques.)

how its much made of

Mass is a measurement of

matter

More matter in ana mount of space =

greater density

Displacement Method (def.)

to determine the volume for irregularly shaped objects.

Formula of Density

Mass/Volume

What is the density of water

1g/mL

If you break an object of UNIFORM COMPOSITION in half what happened to the density?

It stays the same.

what is the volume of an solid object measured inWhen

cm³

what is the volume of liquid measured in

milliliters

When does displacement occur (in water test)

An object is immersed in a fluid, and the fluid level rises

(one of) Laws of Physics

 no two objects can occupy the same space at the same time

Example of Law of Physics

can't walk through a wall

Metric System

Kilo, Hecto, Deca, Base, Deci, Centi, Milli

Kilogram abbreviation

kg

Meter abbreviation

m

Gram abbreviation

g

Milliliter abbreviation

mL

millimeter abbreviation

mm

Liter abbreviation

L

Kilometer abbreviation

km

Centimeter abbreviation

cm

Milligram abbreviation

mg

Deca- abbreviation

da

deci- abbreviation

d

Kilo- Unit

1000

Hecto unit

100

deca- unit

10

Base unit

1

What are the base section

Liter, Meter, gram

deci- unit

.1

centi- unit

.01

milli- unit

.001

Scientific Method

systematically reseaerch an answer to a question/problem

Steps of the scientific method

Observation, hypothese, experimental design, data collect/data analysis, conclusion, repeat

How do we do step; Observation

We use our senses from our environment

Hypothese (def.)

a predictive statement that can be tested experimentally

Requirements of: Hypothesis

Be testable, strong single statement

How is a hypothesis not like a educated guess

A statement that makes prediction based on problem being tested

Experimental Design must:

detailed procedure for the experiment must be created, include all equipment

Data collection must:

Take measurements to test hypothesis, organized, must be analyzed.

Data analysis (def)

Data are interpreted to make conclusions while looking for relationships between variables

What is the most useful form of data analysis

Graphing

Graphing is beneficial because

give visual, easy to understand representation of data.

Conclusion (def.)

states whether hypothesis has been accepted or rejected. explain why or why not supported.

A good conclusion will:

allow you to communicate your results with your peers, so they can attempt to replicate your results

Repeat (Scientific Method)

Experiment must be conducted by yourself and other several times before consensus can be determined

Mnemonic for the metric system

King Henry Died By Drinking Chocolate Milk

Mnemonic for scientific method

Our Questions Help Explain Data Collected Honestly Repeatedly

Explanation of Mnemonic for scientific method

• Our → Observations

• Questions → Lead to Questions

• Help → Form a Hypothesis

• Explain → Design an Experiment

• Data → Collect and Analyze Data

• Collected → Make a Conclusion

• Honestly → Hypothesis is Accepted or Rejected

• Repeatedly → Replication by others

Explanation of Mnemonic for Metric System

• King → Kilo (k)

• Henry → Hecto (h)

• Died → Deca (da)

• By → Base unit (meters, liters, grams)

• Drinking → Deci (d)

• Chocolate → Centi (c)

• Milk → Milli (m)

density symbol

𝜌

What substance has the greatest density? Honey, oil, water?

Honey

what’s denser, water or alochol?

Water

What’s dense enough to let a candle float, a dif liquid or water?

water