NC Science Released Test (1-30)

Front

What is conduction?

Back

Conduction is the process of heat transfer through direct contact between materials. For example, when a metal pot is heated on a stove, the heat travels through the metal handle by conduction.

Front

What is an example of a chemical change?

Back

Wood burning is an example of a chemical change, as it transforms into ash and smoke, creating new substances.

Front

What does mass affect in motion?

Back

The mass of an object affects the amount of force needed to change its motion. A heavier object requires more force to stop than a lighter one.

Front

What can be concluded if a person travels farther in the first half of their walk?

Back

If a person travels farther in the first half of their walk, it can be concluded that their average speed was faster during that time.

Front

What is a producer in an ecosystem?

Back

A producer is an organism that can make its own food, typically through photosynthesis. An example is grass.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases). For example, warm air rising and cool air sinking creates a convection current.

Front

What is radiation?

Back

Radiation is the transfer of heat in the form of electromagnetic waves, such as sunlight warming the Earth.

Front

What is the relationship between speed, distance, and time?

Back

The relationship is described by the formula: Speed = Distance ÷ Time. This means that speed increases if distance increases or time decreases.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance but not its chemical composition (e.g., ice melting), while a chemical change results in the formation of new substances (e.g., rusting iron).

Front

What is an example of a solid that can change shape?

Back

An example of a solid that can change shape is clay, which can be molded into different forms.