6th

Please be in your seat ready to go when the bell rings

We will start the quiz after a short review

Chapter 1The Nature of

Science

Chapter 1 Vocabulary

ScienceTechnologyScientific theory

VariableMass

Volume WeightScientific Notation

PrecisionAccuracy

What is the purpose of science?

•To investigate questions

•To support or refute a

theory

•To gain knowledge

Science is a system of knowledge based on facts or

principles

Technology is the application of science to meet human

needs

Theories & Laws

Theory A tested, possible explanation of a natural event.

Law a summary of an observed natural event

(a repeated observation about nature)

*A theory must pass 3 tests:

1.A theory must explain observations simply & clearly

2. A theory must be repeatable

3. Scientists must be able to predict from a theory

Qualitative vs. Quantitative

QualitativeQualitative

Describes data using words

Quality

Ex. There are many red cars in the parking lot

QuantitativeQuantitative

Describes data with numbers

Quantity

Ex. There are 14 cars in the parking lot

What is it used for?Who can use it?

What is it used for?Who can use it? State the Question

Form A HypothesisTest the HypothesisObserve/Collect DataDraw a Conclusion

The Scientific Method

Experiments

How many variables are in a typical experiment?

How many variables can be tested at one time?

The main parts of an experiment

Independent Variable

Dependent Variable (result)

Control

Determine the variables in the experiment

A botanist is studying the affect of fertilizer on pea plants.

She test 5 plants. She adds 6 oz of fertilizer to plant 1, 7 oz of fertilizer to plant 2, 8 oz to plant 3, 9 oz to plant 4 and no fertilizer to plant 5. She waters each of the plants with 200mL of water everyday for 2 weeks and places them in the sun for 3 hours each day.

The Metric System

The International System of Measurement (SI units)

Metric Conversions

K H D B D C M

Practice Problems

550 mm = ________m

1.6 kg = ________g

2800mmol =________mol

Organizing Data

There are 3 main types of graphs:Bar

Line

Pie

Scientific Notation

A value written as a simple number multiplied by a power of 10.

Shortcut: If you move the decimal right the exponent is negative If you move it to the left the exponent is

positive

Practice

800 000 000 m

0.0015 kg

60 200 L

Using Scientific Notation

When you multiply, you add the exponents

When you divide, you subtract the exponents

Significant Digits (Figures)

The digits in a measurement that are known for certainty.

1.63816381.6