The Metric System
How many grams are in a kilogram?
1000 g or 103 g = 1 kg
What do you call the ratio used to convert one unit to another in dimensional analysis?
Conversion factor
Rank the three states of matter from LEAST to MOST dense
1-Gas
2-Liquid
3-Solid
She used to be a competitive gymnast.
Who is Addison?
What is the formula to calculate density?
D = M/V or g/mL or g/cm3
How many centimeters are in a meter?
100 cm or 102 cm = 1 m
If 1 inch = 2.54 cm, convert 10 inches to centimeters using dimensional analysis.
25.4 cm
What state of matter has an indefinite shape but a definite volume?
Liquid
She has a neighborhood babysitting business.
Who is Elysa?
If an object has a mass of 50 grams and a volume of 10 cm³, what is its density?
5 g/cm3
How many milliliters are in a liter?
1000 mL or 103 mL = 1 L
Explain why units cancel out in dimensional analysis.
Because conversion factors are equal to one, units in numerator and denominator cancel, leaving desired units
What is a physical change?
A change that affects the form or appearance of a substance but does not change its chemical composition
Who is Ethan?
An unknown metal has a density of 8 g/cm³. If you have a 40-gram sample, what is its volume?
5 cm3
Name 2/3 countries that DONT use the metric system.
Burma (Myanmar), Liberia and the US
Convert 5000 mL to L using dimensional analysis.
5 L
What is a chemical change?
A change that produces one or more new substances with different properties
She is fascinated by meterology.
Who is Savannah?
How does the density of a substance change when its temperature increases?
Density usually decreases as temperature increases because volume expands
What is the pneumonic device for remembering the metric system?
King Henry Died by Drinking Chocolate Milk
Convert 60.0 miles per hour (mph) to meters per second (m/s). (Use 1 mile = 1609 meters, 1 hour = 3600 seconds)
26.82 m/s
How can you tell a chemical change has occurred during a reaction? Name two signs.
Color change, gas formation, temperature change, or formation of a precipitate
He plays ice hockey.
Who is Ben?
Why does ice float on water based on density?
Ice is less dense than liquid water because its molecules are arranged in a rigid lattice that takes up more space