Unit 2- Compounds & Mixtures

Front

Difference between a mixture and a pure substance?

Back

A mixture can be separated into its components by physical means, while a pure substance cannot.

Tags

DOK Level 1: Recall

FL.SC.8.P.8.9

Front

Explain how the atomic theory has evolved over time and why scientific theories may be modified but rarely discarded.

Back

The atomic theory has been modified as new evidence has been discovered, showing that scientific theories are refined over time.

Tags

FL.SC.8.P.8.1

DOK Level 3: Strategic Thinking

Front

Compare the properties of acids and bases.

Back

Acids taste sour and turn blue litmus paper red, while bases taste bitter and turn red litmus paper blue.

Tags

DOK Level 2: Skill/Concept

FL.SC.8.P.8.8

Front

Describe the motion of particles in a gas compared to a solid.

Back

Particles in a gas move freely and rapidly, while particles in a solid are tightly packed and vibrate in place.

Tags

FL.SC.8.P.8.1

DOK Level 2: Skill/Concept

Front

Why is the atomic theory considered a scientific theory and not a law?

Back

Because it explains observations and can be modified with new evidence, unlike laws which describe phenomena.

Tags

FL.SC.8.P.8.1

DOK Level 3: Strategic Thinking

Front

Identify the compound from the following list: Sodium (Na), Chlorine (Cl), Sodium chloride (NaCl), Oxygen (O)

Back

Sodium chloride (NaCl)

Tags

FL.SC.8.P.8.8

DOK Level 1: Recall

Front

How can you distinguish between a solution and a pure substance?

Back

A solution is a type of mixture, while a pure substance has a fixed composition.

Tags

DOK Level 2: Skill/Concept

FL.SC.8.P.8.9

Front

What is the primary reason scientific theories, such as the atomic theory, are modified over time?

Back

New evidence and discoveries that provide a better understanding of the natural world.

Tags

FL.SC.8.P.8.1

DOK Level 3: Strategic Thinking

Front

Explain how the finite number of elements can form a multitude of compounds.

Back

Elements can combine in various ways to create a vast number of compounds.

Tags

DOK Level 2: Skill/Concept

FL.SC.8.P.8.5

Front

What best describes a pure substance?

Back

A material with a uniform and definite composition.

Tags

DOK Level 1: Recall

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