Exploring Separation Techniques in Nature

What is the main focus of separation techniques?

• Combining different materials

• Separating materials based on their properties

• Creating new elements

• Destroying unwanted materials

Which of the following is an example of a simple separation technique?

• Chromatography

• Distillation of petroleum

• Separating cream from milk

• Reverse osmosis

What property is used to separate hydrocarbons in petroleum?

• Density

• Boiling point

• Particle size

• Color

How does reverse osmosis purify seawater?

• By using a membrane with specific pore sizes

• By boiling the water

• By freezing the water

• By adding chemicals to the water

In a centrifuge, where do heavier substances move?

• To the bottom

• To the top

• Away from the rotational axis

• To the center

What is the role of a membrane in reverse osmosis?

• To add salt to the water

• To freeze the water

• To allow only fresh water to pass through

• To heat the water

What is the purpose of chromatography in forensic science?

• To create new compounds

• To identify the color of substances

• To measure the density of substances

• To separate and analyze ingredients in a mixture

What is the main challenge in separating mixtures with similar physical properties?

• They can be separated easily

• They do not exist

• They require chemical separation techniques

• They are already pure

What happens to particles when they are accelerated to high speeds and smashed into each other?

• They change color

• They disappear

• They combine to form new particles

• They break into their constituent parts

Tags

NGSS.MS-PS2-1

What is the ultimate goal of using separation techniques in particle physics?

• To create new elements

• To find the most elementary particle

• To change the properties of particles

• To destroy particles