Ch 1 Flashcards
What is the value of the prefix Giga (G)
10^9 or 1,000,000,000
What is the value of the prefix Mega (M)
10^6 or 1,000,000
What is the value of the prefix Kilo (k)
10^3 or 1,000
What is the value of the prefix hecto (h)
10^2 or 100
What is the value of the prefix deka (da)
10^1 or 10
What is the value of the prefix deci (d)
10^-1 or 0.1
What is the value of the prefix centi (c)
10^-2 or 0.01
What is the value of the prefix milli (m)
10^-3 or 0.001
What is the value of the prefix micro (u)
10^-6 or 0.000,001
What is the value of the prefix Nano (n)
10^-9 or 0.000,000,001
What is the value of the prefix Pico (p)
10^-12 or 0.000,000,000,001
what system of measurements is used in science
The metric system is used for science and in most countries, it’s based on a system of multiples of 10.
what is metric also known as
It is also known as the international system of units (SI)
what are the 4 main parts of the metric system
It has 4 primary components: Length, Mass, Volume and temperature
what is length
- measurement of distance
- The base unit is the meter (m)
- All other units related to the meter, ex 1Km = 1,000m, 100cm = 1m, etc
what is mass
- measure of the matter in a substance/object
- The base unit is the gram (g)
- Kilograms are commonly used in science
- All other units related to the gram, ex 1Kg = 1,000g, 1,000mg = 1g, etc
- Tons are also a metric used, 1 metric ton = 1,000kg
what is weight
- Weight is a measure of the gravitational pull on an object
- It varies depending on the gravity experienced by the object, ie a 60kg person on earth weighs 10kg on the moon
- Also used the gram, kilogram, etc as units
what is volume
- The space occupied by a substance
- For liquids the base unit is the litre (L)
- All other units related to the litre
- For solids the base unit is m^3
- All other units related to m^3, ex 1m^3 = 1,000,000cm^3
what is temperature
- Uses the degree celsius as a unit
- No derived units
- degrees kelvin as also used which have the same intervals, a change in 1 degree celsius is a change in 1 degree kelvin. The difference is 0 degrees kelvin is equal to -273.15 degrees celsius (absolute zero)
what is science
- Science is the process of observation and tests used to prove or disprove a hypothesis
- the goal of science is to understand the world around us
what is the scientific method
The scientific method is described as organized common sense, and it’s a series of steps to form a logical conclusion:
what are the steps of the scientific method
- Observing and stating a problem
- Forming a hypothesis
- Testing the hypothesis
- Recording and analyzing data
- Forming a conclusion
- Replicating the work
how do you observe and state a problem
Start with an observation and form a question of problem
how do you form a hypothesis
Gather information and form a possible explanation for your problem
