Chapter 1 Lessons 1-3

Lesson 1

100

What is a chemist?

A scientist who studies matter and how it changes

200

What is a theory?

A widely accepted hypothesis that has been tested many times

300

What is the difference between qualitative and quantitative?

Qualitative is with letters and quantitative is with numbers

400

What is technology?

The application of science to help people or improve their lives

500

What are the steps to the scientific method?

Observe, Ask, Hypothesis, Test, Analyze Results, and Share Results

Lesson 2

100

What does a negative exponent in scientific notation mean?

It is a small number <1

200

What is standard notation?

Numbers that are written out normally

300

What is scientific notation?

A shortcut method for writing very large or very small numbers

400

Why is 24.5 x 10³ not in scientific notation?

The decimal needs to come after the first number

500

The number that is written just above the writing line is called?

The superscript

Lesson 3

100

What are significant figures?

A meaningful digit in a measure value; the significant figures in a given value are all of the certain digits plus one estimated digit

200

What is certainty in measuring tools?

The better quality of the tool, the more certain the measurement

300

What is the difference between precision and accuracy?

Accuracy is close to accepted value and precise measurements are close to each other

400

What is Rule 1 for significant figures?

Nonzero digits 1-9 are significant

500

What is rule 4 of significant figures?

Zeros used for spacing the decimal point are not significant

Practice Problems

100

Convert 340,000 into scientific notation

3.4 x 10⁵

200

200,035 has how many significant figures

6

300

Write 6.1230 x 10¹ in standard notation

61.230

400

How many significant figures in 3.0501 x 10³?

5

500

How many significant figures in 0.0020

2