Pure Substances and Mixtures

Which of the following describe PURE SUBSTANCES?

• It is heterogenous

• It has defined and unique properties

• Its composition varies from sample to sample

• There are two classification of Pure substances: Homogenous and Heterogenous

Tags

NGSS.MS-PS1-4

A mixture is formed by ________________

• combining same elements

• combining homogenous substances

• combining two or more pure substances

• combining salt and water

The two types of Mixtures are __________ and ___________. (Select all correct answers)

• Homogenous and Solutions

• Elements and Compounds

• Compounds and Mixtures

• Homogenous and Heterogeneous

Homogenous mixtures forms _________ and has a uniform appearance.

• four phases

• three phases

• two or more phases

• one phase

What are the two kinds of heterogenous mixtures? (Select all correct answers)

• Solutions and Suspension

• Suspension and Colloids

• Colloids and Solutions

• Universal Solvent

Homogenous Mixtures are also known as ____________

• Colloids

• Solutions

• Suspension

• Mixtures

●In a__________, particles are suspended in a liquid medium, which can later settle in the bottom of the container.

• Solution

• Suspension

• Colloid

A ______ is a mixture in which one substance is dispersed or distributed to another substance. Milk and paint are examples

• Solution

• Suspension

• Colloid

_______ refers to the random motion of particles when suspended in gases or liquids.

• Locomotion

• Brownian Motion

• Movement

• Tyndall Effect

__________ refers to separating components with varying sizes by scooping or picking. Example if you want to separate cereals from milk.

• Using Magnets

• Physical Manipulation

• Sedimentation and Decantation

• Filtration