Scientific Method
An explanation based on fundamental principles about why something happens.
What is a theory?
The SI base unit of mass.
What is the kilogram (kg)?
How many sig figs are in 0.04550 g?
4.
Formula for density.
The capacity to do work.
What is energy
A statement that is well-tested, widely accepted, and often expressed as an equation.
What is a law?
Convert 1.00 mile into meters.
What is 1609.3 m?
What kind of zeros never count as significant figures?
Leading zeros.
A piece of silver has a mass of 10.0 g and density 10.49 g/cm³. What is its volume?
0.953 cm³.
Energy associated with movement.
What is kinetic energy?
What is the difference between a law and a theory?
A law describes a relationship, while a theory explains why it happens.
How many mL are in 1 m³?
1,000,000 mL.
Calculate 5.9 – 0.221, with correct sig figs.
5.7.
A cube of copper is 3.00 in on a side, mass = 3.96 kg. What is its density in g/cm³?
8.92 g/cm³ (after conversion).
The energy unit where 1 cal = 4.184 J.
Calorie.
The step in the scientific method that involves using senses or instruments to gather data.
What is an observation?
Convert –6 °C into Kelvin.
What is 267 K.
In multiplication/division, how do you decide how many sig figs to keep?
Use the factor with the fewest sig figs.
If 3 eggs require 250 g flour and 500 mL milk, how much flour & milk for 2 eggs?
170 g flour, 330 mL milk.
Exothermic reactions have what sign for heat (q)?
Negative.
Gas pressure being proportional to temperature is an example of what kind of scientific statement?
What is a law (Charles’ Law)?
The SI base unit of temperature.
What is the Kelvin (K)?
Round 12.124 (from 9.0 + 3.124) correctly with sig figs.
12.1.
The mass-to-volume ratio can be applied beyond density to what general kind of problems?
All proportional/ratio problems.
Is a hand warmer exothermic or endothermic?
Exothermic, negative q.