Unit 1.2 Test Part 1 2024

Front

What is the process of separating a mixture based on densities?

Back

Centrifugation

Front

What is a pure substance?

Back

A pure substance is an element or a compound.

Front

What is a tradeoff in design?

Back

The process of giving up one quality or feature of a design to gain a different quality or feature.

Front

Identify which of the following properties are intensive and which are extensive: Density, Volume, Mass, Flammability.

Back

Intensive: Flammability, Density; Extensive: Volume, Mass.

Front

True or False: Elements that have gone through a chemical change can be separated back into elements by using a physical process.

Back

False.

Front

What is centrifugation used for in a laboratory setting?

Back

Centrifugation is used to separate components of a mixture based on their densities.

Front

Define an element in the context of pure substances.

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is the difference between intensive and extensive properties?

Back

Intensive properties do not depend on the amount of substance present, while extensive properties do depend on the amount of substance.

Front

Give an example of a tradeoff in product design.

Back

A tradeoff in product design could be making a smartphone thinner (aesthetic) at the cost of battery life (functionality).

Front

What happens to the properties of a substance during a chemical change?

Back

The properties of a substance change during a chemical change, resulting in the formation of new substances.