Balance and Motion

Unit Review Sheet

Facts and Definitions

Lesson 1: What Is Balance?

• Balance means making two amounts equal to each other.
• A balance is a tool used to see how the weight of materials compares to each other.
• Solids and liquids can be balanced.
• Weights can be used to weigh matter on a balance.

Lesson 2: What Can Be Balanced?

• A balanced equation has an equal amount on each side.
• A balanced diet helps people stay healthy.

Lesson 3: Symmetry

• Symmetry is found when a figure can be folded so that two halves are identical and line up with each other.
• A vertical line runs from top to bottom.
• A horizontal line runs from left to right.
• A line of symmetry can be vertical or horizontal.

Lesson 4: Force and Motion

• Motion means moving something from one place to another.
• Force is a push or a pull.

Lesson 5: Gravity

• The center of gravity is the point from which the weight of an object is evenly distributed so that the object balances.
• Gravity is a force in nature that works to pull two bodies of matter toward each other. It is the force that keeps objects on the Earth from floating away.

Lesson 6: Friction

• Friction is a force that happens when two objects rub together.
• A singular noun refers to one thing.
• A plural noun refers to more than one thing.
• "Is" and "are" are linking verbs.

Final Project: A Wordless Skit

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