Measurements
Used to find an object's length
What is a meter stick?
The system of units we use in science
What is the metric system?
Why do we use scientific notation?
To represent extremely large or small numbers easier
Standard units used for measurements
What are SI units?
An object that floats in water (density = 1 g/mL)
What is a density greater than 1 g/mL?
The amount of space an object takes up
Convert 500 cm to m
5 meters
Convert 5.5 x 103 to standard notation
5,500
Celsius or Kelvin
What are temperature units?
If given density and volume, how would you find the mass?
mass = (density) x (volume)
Used to find the mass of an object
What is a balance/triple beam balance?
Convert 9 kg to grams
9,000 grams
Convert 0.00000257 to scientific notation
2.57 x 10-6
They are used worldwide, and are easier to work with because they all involve powers of 10
Why do we use the metric system?
Found in a graduated cylinder, measured at the bottom to find the volume of liquid
What is a meniscus?
How many liters are in 500 mL?
0.5 Liters
Write 9.5256 in scientific notation
9.5256 x 100
m3, cm3, km3, etc.
What are units of volume for a solid?
What order would layers form in a graduated cylinder mixed with compounds:
A (d=1.2 g/mL), B (d=2.42 g/mL), C (d=0.3 g/mL), D (d=1.04 g/mL), E (d=0.89 g/mL)
Bottom --> Top
B, A, D, E, C
List the steps to measure the density of a marble in lab (state the correct equipment too)
1. Find the mass of the marble on balance
2. Use water displacement in a graduated cylinder to find the marble's volume
3. Use the density formula (Density = mass / volume) to find it's density
How many mm are in 5 kilometers?
5,000,000 mm
6.022 x 1023 = ____________________________
Bonus: This number has a special name... what is it called?
602,200,000,000,000,000,000,000
Bonus: What is avogadro's number?
State all that are valid units for DENSITY:
g/L , g/mL , m3/L , mg/m3 , L/g , mL/cm3 , mL
g/L , g/mL , mg/m3
Density = 2 g/cm3