Concept 1
What is an example of a qualitative observation vs a quantitative observation?
Qualitative: describe qualities
Quantitative: uses numbers
Write the following numbers in scientific notation:
6,020,000,000,000
0.00003450
6.02 x 1012
3.450 x 10-5
What are the states of matter?
Solid, liquid, gas
The average temperature of a human is 98.6 degrees Fahrenheit. What is this temperature in degrees Celsius?
37.0 degrees Celsius
What does it mean to be accurate?
To be on the correct value.
What are the following numbers in standard notation:
3.032 x 10-3
2.15 x 108
0.003032
215,000,000
How do the atoms of the states of matter move (think in terms of shape and volume)?
Solid: fixed shape and volume
Liquid: fixed volume, moving shape
Gas: no fixed shape or volume
58 mL to L
What does it mean to be precise?
To have your measurements close to each other but not necessarily correct.
You find the length of a pencil to be 19 cm long. The true length is 18.78 cm long. Find the percent error of your measurement.
5.32%
Heterogenous mixture vs homogenous mixture
Heterogenous is a different distribution of components within a mixture; homogenous is the same distribution of components within a mixture
23 km to miles
14 miles
How many significant figures are in the following?
10
23.4
10.
0.0203
1
3
2
3
Why is scientific notation used?
To represent really large or really small numbers in an easier to read format.
How do you classify something as being a chemical change or a physical change?
Chemical: you can't get the original substances back; new properties are seen
Physical: you can get the original substances back; same properties are seen
Convert 9,602 grams to pounds
Provide 2 qualitative and 2 quantitive observations of Mrs. Pickett's room.
varies
Convert 21 days to seconds
1,800,000 seconds
What is the relationship between atoms, elements, and compounds?
Atoms are the smallest unit of an element that are have the properties of that element.
Compounds are two or more atoms of different elements chemically combined.
Convert 5,500 mm to yards
6.0 yards