8th Grade STAAR Review

Front

What is a balanced force?

Back

A balanced force occurs when the net force acting on an object is zero, meaning that all forces are equal and opposite, resulting in no change in motion.

Front

What instrument is used to measure mass?

Back

A triple beam balance is used to measure mass.

Front

What is adaptation in biology?

Back

An adaptation is an inherited characteristic that provides a specific advantage to individuals, making it more likely for them to survive and reproduce in their environment.

Front

According to Newton's law of inertia, why does a soccer ball stop when kicked?

Back

The soccer ball stops due to friction with the grass, which applies a net force that decreases its speed.

Front

What are the two most important factors for hurricanes?

Back

Low pressure and warm water are the two most important factors for hurricanes.

Front

What is an unbalanced force?

Back

An unbalanced force occurs when the net force acting on an object is not zero, causing the object to accelerate in the direction of the greater force.

Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion; an object at rest stays at rest, and an object in motion stays in motion unless acted upon by a net force.

Front

What is the role of friction?

Back

Friction is a force that opposes the motion of an object, acting in the opposite direction to the movement.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, measured in kilograms, while weight is the force of gravity acting on that mass, measured in newtons.

Front

What is the water cycle?

Back

The water cycle is the continuous process by which water evaporates from the Earth's surface, condenses in the atmosphere, and precipitates back to the surface.