The Scientific Method
What is an Observation?
Something that can be seen with the naked eye
write 0.0023012 in scientific notation with 3 significant figures
2.30 * 10^-3
what is the prefix for the exponent 10^3
Kilo
What is an exothermic process?
When the system gives off or releases heat and its temperature decreases
What is the equation for density?
D = m/v
Law, observation or Theory?
Certain diseases are caused by microscopic organisms
Theory - no known exceptions, explains what causes diseases
significant figure rules for multiplication and division/ rule for addition/ subtraction
Addition/ Subtraction: Least number of decimal places
what is the exponent for Micro?
10^4
What is the equation for degrees F to Degrees C
C = F -32 / 1.8
True or false?
A can of soda has a density of 0.989g/mL, the can should float.
true it is less than 1.00g/mL density of water
Law, observation or Theory?
P = n* R * T / V
law, collection of facts expressed as an equation
How many significant figures in your final answer
21.08130000 x 21.74
4 significant figures
convert 5.8 pints to mL
conversion factor (1 pint = 0.473 L)
2.7*10^3 mL
How many electrons are in the outermost valence electron shell in carbon
4 Electrons
Which is heavier? 100 g of feathers or 100g of bricks?
they the same lol
but the density of each is different
Law, observation or Theory?
God Exists
none - not a fact, law, observation or anything by any scientific means
19.667 - (5.4 x 0.916)
14.
Convert 84.0 nm to pm
84.0 * 10^3 pm
How many Joules are in 257 Cal
1 cal = 4.184 J
1080 J
if an object has a density greater than 1 will it sink or float. Explain
The object would sink. due to the density of water being 1.0 having an object with more density will then lead the object to sink
what is the difference between law and theory?
law is a scientific prediction to an outcome of a specific scientific situation. On the other hand theories attempt to provide the most logical explanation as to why an outcome becomes that outcome based on the situation.
8.40 * 10^-420 s / (4.0 * 10^6)^2
Convert 12.3 mm^3 to KL
12.3 * 10^-9 KL
What are the chemical symbols for Cobalt, Copper, Calcium, and Chlorine
Co, Cu, Ca, Cl
Calculate the density (in g/cm3) of a regularly shaped sheet of metal that measures 2.5mm x 4.3mm x 0.10mm and has a mass of 0.0084g
Hint: you start with 2 units in a T-table and remember cm^3 has to be on the bottom
D = 7.813 g/cm^3