Unit Conversion & Significant Figures

What is the primary purpose of units in science?

• To create confusion

• To make science more complex

• To limit scientific research

• To ensure consistency in measurements

Tags

NGSS.MS-PS2-2

How many fundamental units are there in the SI system?

• Seven

• Five

• Twelve

• Ten

Why was the original definition of the second based on Earth's rotation problematic?

• Earth's rotation is irrelevant

• Earth's rotation is too fast

• Earth's rotation is too slow

• Earth's rotation is not constant

What was the cause of the Mars Climate Orbiter disaster?

• Engine failure

• Unit conversion error

• Lack of fuel

• Communication breakdown

What do significant figures communicate in a measurement?

• The size of a number

• The uncertainty in a measurement

• The exactness of a number

• The speed of a process

How does scientific notation help in scientific communication?

• By making numbers larger

• By hiding significant figures

• By simplifying calculations

• By clarifying scale and precision

What is a key benefit of the SI system's simplicity?

• It makes science easier to ignore

• It reduces the need for units

• It allows for complex measurements

• It limits scientific research

Why is it important to track units meticulously in science?

• To increase costs

• To ensure mission success

• To make calculations harder

• To confuse scientists

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-4

What is the role of significant figures in calculations?

• To hide uncertainty

• To prevent error propagation

• To increase error

• To make numbers larger

What does the historical definition of the kilogram illustrate?

• The importance of physical objects

• The role of scientific consensus

• The need for more units

• The irrelevance of units