Copy of 8th Grade MidTerm Review

Front

What is an unbalanced force?

Back

An unbalanced force is a force that causes an object to accelerate, change direction, or change shape. It occurs when the net force acting on an object is not zero.

Front

What does a horizontal line on a distance-time graph indicate?

Back

A horizontal line on a distance-time graph indicates that the object is at rest, meaning it is not changing its position over time.

Front

How do plants convert light energy?

Back

Plants convert light energy into chemical energy through the process of photosynthesis, using sunlight to transform carbon dioxide and water into glucose and oxygen.

Front

What is the significance of nitrogen in chemical reactions?

Back

Nitrogen is a key element in many chemical reactions, particularly in the formation of amino acids and proteins, and is essential for life.

Front

What causes the seasons on Earth?

Back

The seasons on Earth are caused by the tilt of Earth's axis as it revolves around the Sun, leading to varying angles of sunlight and different temperatures throughout the year.

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation, indicating that mass is conserved during the reaction.

Front

What is the formula for calculating speed?

Back

Speed = Distance / Time. It measures how fast an object is moving.

Front

What is photosynthesis?

Back

Photosynthesis is the process by which green plants use sunlight to synthesize foods with the help of chlorophyll, converting light energy into chemical energy.

Front

What is the role of chlorophyll in plants?

Back

Chlorophyll is a green pigment found in plants that absorbs light energy, primarily from the sun, and is essential for photosynthesis.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that includes both speed and direction.