In this video, Josh introduces the metric system and the International System of Units (SI). He explains the seven SI units and how they are used in scientific measurements. The video covers the metric system's base 10 conversion system and demonstrates how to convert units using a metric conversion chart. Josh also introduces dimensional analysis, a method for converting units by canceling out unwanted units and replacing them with desired ones. The video concludes with a practical example of converting meters to kilometers using dimensional analysis.

Why was sharing and collaboration difficult before the standardization of measurement units?

• Measurements were not important.

• Because people didn't like to share.

• Different regions used different measurement systems.

• There were no tools for measurement.

What is the International System of Units also known as?

• Customary Units

• Imperial System

• Metric System

• SI Units

Which of the following is NOT an SI unit?

• Candela

• Meter

• Kilogram

• Pound

Why might the SI unit of a meter be inconvenient for measuring a pencil?

• A meter is too small.

• A meter is too large.

• A meter is not precise.

• A meter is not a real unit.

What is the metric prefix for one thousandth of a meter?

• Kilo

• Milli

• Centi

• Deci

How does the metric system simplify expressing measurements?

• By using random numbers.

• By using a base 10 conversion system.

• By using fractions.

• By using letters instead of numbers.

What is the main goal of dimensional analysis?

• To add more units.

• To cancel out unwanted units.

• To make calculations harder.

• To ignore units.

In dimensional analysis, what is the first step?

• Write the converted measurement.

• Add the conversion factor.

• Write the given measurement.

• Multiply by zero.

What is a conversion factor in dimensional analysis?

• A tool to measure length.

• A fraction comparing two units.

• A type of calculator.

• A number that multiplies the given unit.

How do you set up a fraction in dimensional analysis to cancel out the given unit?

• Place the given unit on the top.

• Place the given unit on the bottom.

• Ignore the given unit.

• Multiply the given unit by itself.