Chemistry Test -- Sig Figs, Science

sig figs, scientific method, DV, IV

what are independent and dependent variables?

independent variables are factors you can change and the dependent variable changes depending on the independent variable

what are constants?

constants are factors that stay the same during an experiment

what is a control group?

a control group is used to see what happened without the changing factor used to modify the independent variable

what are observations?

observations is information collected using 5 senses

what is the difference between scientific laws and theories?

scientific laws are accepted true in a scientific community, and scientific theories are generally accepted as “true” but can be disproven

what is science?

science is the study of the natural world through experiments, observations, and logic

how do you know if an idea is scientific?

if it is testable, repeatable, observable, and falsifiable

what is the scientific method? what are the steps of the scientific method?

the scientific method are questions asked to do an experiment or to answer a question
1. ask questions
2. collect information by research
3. form a hypothesis based on observations, data, and research (if… , then…)

4. test the hypothesis thru experiments

5. record and study the data

6. form conclusion

what are significant figures?

minimum number of digits required to report a value without a loss of accuracy

what is scientific notation?

way to write small and large numbers

what is the difference between qualitative and quantitative data?

qualitative data is based on observations and interpretation of data, and quantitative data is based on numerical measurements

how do you find the volume of regular and irregular solids?

for regular solids multiply length, height, and width

for irregular solids measure by displacement of water (subtract)

in volume terms, what does 1 mL equal?

1 cm³

what is density?

measurement of ratio of mass to volume of a substance

what is the formula to fine the density of an object? what do the letters stand for?

D = m/v
D: density

m: mass
v: volume

what is the density measurement of a solid?

g/cm³

what is the density measurement of a liquid?

g/mL

__ cm = 1 in.

2.54

1 lb = __ qt

1.06

1 kg = __ lb

2.2

1 km = __ miles

0.62

1 mile = __ ft

5280

1 yd = __ ft

3

1 gal = __ qt

4

1 ft = __ in.

12

__ um = 1 m

10^6

__ nm = 1 m

10^9

__ pm = 1 m

10^12

__ cm = 1 m

100

__ mm = 1 m

1000

__ dm = 1 m

10

__ m = 1 km

1000