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Mathematical equations are more like laws. "Often, a law can be expressed in the form of a single mathematical equation."

1.2
Identify the 4 fundamental units of measurement. What makes them 'fundamental'?
Meters, Kilograms, Seconds, Ampere. It is an intriguing fact that some physical quantities are more fundamental than others and that the most fundamental physical quantities can be defined only in terms of the procedure used to measure them. The units in which they are measured are thus called fundamental units.
How many nanometers are found in one meter?
1000000000
What is a 'conversion factor' when performing Dimensional Analysis?

A car is traveling at a speed of 33 m/s. (a) What is its speed in kilometers per hour? (b) Is it exceeding the 90 km/h speed limit?

1.3
the rule is that the last digit written down in a measurement is the first digit with some uncertainty. In order to determine the number of significant digits in a value, start with the first measured value at the left and count the number of digits through the last digit written on the right.

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1. A model is something that displays something that is too difficult or impossible to display directly, and a theory is an explanation for something that happens in nature.

2. Theories are less concise than laws and more vague, making them not "proven" like laws

3. Theories are not mathematically proven statements like laws are.
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1.2

1. meter, kilogram, second, ampere. They are fundamental because other units are derived from them.

2. one billion

3.
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Mathematical equations are more like laws can be expressed in a simple mathematical equation for a general pattern in nature. Laws and theories are similar in that they are both scientific statements that result from a tested hypothesis and are supported by scientific evidence. However, the designation law is reserved for a concise and very general statement that describes phenomena in nature..."

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Mathematical equations are more like laws. "Often, a law can be expressed in the form of a single mathematical equation."

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How does a model differ from a theory?- A model is a representation of something that is too hard to explain verbally. While a theory is an explanation of patterns that we have observed and verified by multiple people.
What determines the validity of a theory?- Being verified by several groups of researchers and/or scientists who have also experienced the same events.
How does a theory differ from a law? - A theory is an explanation of patterns that has been supported by scientific evidence. A law is specified in the way it describes a pattern, also supported by scientific evidence and research. (For example, can be written like a math equation)

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A mathematical equation is more like a law. Evidence: "Often, a law can be expressed in the form of a single mathematical equation."

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1.3
the rule is that the last digit written down in a measurement is the first digit with some uncertainty. In order to determine the number of significant digits in a value, start with the first measured value at the left and count the number of digits through the last digit written on the right.

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Identify the 4 fundamental units of measurement. What makes them 'fundamental'?

length, mass, time and electric

How many nanometers are found in one meter?

10,000,000

What is a 'conversion factor' when performing Dimensional Analysis?

How many units are equal to another unit

A car is traveling at a speed of 33 m/s. (a) What is its speed in kilometers per hour? (b) Is it exceeding the 90 km/h speed limit?

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Meters, Kilograms, Seconds, Ampere. It is an intriguing fact that some physical quantities are more fundamental than others and that the most fundamental physical quantities can be defined only in terms of the procedure used to measure them. The units in which they are measured are thus called fundamental units

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Metric is better for a few reasons, the main advantage being that units are categorized by 10, a nice even number, great for conversions. Another advantage of metrics is how it is fairly universal among the world, unlike imperial which is used in the US.

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I think that the Metric system is easier and better to use because the unites are categorized by 10´s, which is nice because it is more simple. ALSO most of the world uses the Metric System!

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Using the metric system could be helpful because everything is measured in 10s and also America just needs to stopping quirky and just be like very other country and use metrics.

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Significant figures are the last digit of a measured figure that is estimated to get the most precise as you possible can.
The main rule of significant figures is, "the last digit written down in a measurement is the first digit with some uncertainty. In order to determine the number of significant digits in a value, start with the first measured value at the left and count the number of digits through the last digit written on the right."

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When adding, the answer can contain no more decimal places than the least precise measurement.

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Practice Question:
the rule is that the last digit written down in a measurement is the first digit with some uncertainty
In order to determine the number of significant digits in a value, start with the first measured value at the left and count the number of digits through the last digit written on the right.

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1.3 
Practice Question: 
the rule is that the last digit written down in a measurement is the first digit with some uncertainty
In order to determine the number of significant digits in a value, start with the first measured value at the left and count the number of digits through the last digit written on the right.

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The leading zero, is not considered so be significant (0.21) The 0, in the 0.21 is the ¨leading zero.¨

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zeros on the left side of a whole number are placeholders- not counted as a significant figure