Grade 07 Science - EC: S7.C.1.1.3
Grade 07 Science - EC: S7.C.1.1.3
Continuum of Activities
The list below represents a continuum of activities: resources categorized by Standard/Eligible Content that teachers may use to move students toward proficiency. Using LEA curriculum and available materials and resources, teachers can customize the activity statements/questions for classroom use.
This continuum of activities offers:
- Instructional activities designed to be integrated into planned lessons
- Questions/activities that grow in complexity
- Opportunities for differentiation for each student’s level of performance
Grade Levels
7th Grade
Course, Subject
Science
Related Academic Standards / Eligible Content
Activities
- What is a compound?
- What is a mixture?
- How is a solution like a mixture? How are they different?
- How is a compound like a molecule? How are they different?
- Drew is confused about why salt water is considered a solution, but water and oil is considered a mixture. Explain the difference between a mixture and a solution. What facts can you use to support your explanation about the solubility of salt versus the insolubility of oil in water?
Answer Key/Rubric
- A compound is a substance that is made of two or more different types of atoms bonded together.
- A mixture is a combination of two or more substances that do not combine chemically. Mixtures can be separated by physical means.
- Acceptable responses may include, but are not limited to:
Similarities:
- The substances in a solution remain the same solution.
- All of the substances in a mixture remain the same substance.
Differences:
- A mixture is a combination or two or more substances that do not combine chemically.
- Mixtures can be separated by physical means.
- Mixtures are heterogeneous.
- A solution is a mixture that is homogeneous.
- Acceptable responses may include, but are not limited to:
Similarities:
- A compound is a group of atoms bonded together.
- A molecule is a group of atoms bonded together.
Differences:
- A compound is a group of more than one element.
- A molecule is a group of only one type of element.
- Molecules often help form compounds.
- Acceptable responses may include, but are not limited to:
- A mixture is a combination of two or more substances that do not combine chemically.
- Mixtures can be heterogeneous.
- A solution is a mixture that is homogeneous.
- Salt is soluble in water.
- Oil is insoluble in water.
- Water is a polar substance.
- The positive part of water molecules attracts the negative chloride ions in salt.
- The negative part of water molecules attracts the positive sodium ions.
- Oil is a nonpolar substance.
- Oil molecules are not attracted to water molecules, so water will not dissolve oil.
