read the label of chemical bottles before using it

pour unused chemicals back into their original bottles

use lots of water to wash skin that has been splashed with chemicals

take only as much as you need of shared chemicals

Qualitative observation

Quantitative observation

temperature

conclusion

a guess

a testable, tentative explanation

a theory

data

the variable that changes as a result of the experiment

the variable that the scientist changes

the evidence

the quantitative observation

creating synthetic elements to study their properities

producing heat-resistant plastics for use in household ovens

finding ways to slow down the rusting of iron ships

searching for fuel other than gasoline to power cars

a variable that is unchanged to compare results to

a changed variable

a hypothesis

a conclusion

grey

oily

44.2^oC

Copper

second

kilogram

degree Celsius

meter

7.02 x 10³g

70.22 x 10¹ g

7.022 x 10² g

70.22 x 10² g

copper (8.96 g/cm³)

molybdenum (10.2 g/cm³)

silver (10.5 g/cm³)

technetium (11.5 g/cm³)

0.2296 x 10^-3

2.29 x 10³

2.296 x 10^-2

2.296 x 10²

4

5

7

3

1 g/mL

1 mL/g

25 gmL

10 gmL

the study of matter

the study of the universe

the study of science

the study of numbers