Ohio 8th Science State Test Review

Front

What is density?

Back

Density is the mass of an object divided by its volume, often expressed in grams per cubic centimeter (g/cm³). It determines whether an object will float or sink in a fluid.

Front

Why does cold water sink in a lab experiment?

Back

Cold water is more dense than warm water, causing it to sink when mixed.

Front

What is the relationship between force and motion?

Back

Force is a push or pull that can cause an object to move or change its motion. The greater the force applied, the greater the change in motion.

Front

What are convection currents?

Back

Convection currents are movements within a fluid caused by the fluid's temperature differences, leading to the transfer of heat and the movement of tectonic plates.

Front

What drives the movement of tectonic plates?

Back

The movement of tectonic plates is primarily driven by convection currents in the asthenosphere.

Front

What is a reference point in motion?

Back

A reference point is a stationary object or location used to determine the position or motion of another object.

Front

What information is needed to describe motion accurately?

Back

To accurately describe motion, you need speed, direction, and a reference point.

Front

What is the effect of balanced forces on an object?

Back

Balanced forces acting on an object result in no change in motion; the object remains at rest or continues to move at a constant speed.

Front

What happens when unbalanced forces act on an object?

Back

Unbalanced forces cause an object to accelerate, changing its speed or direction.

Front

What is the role of friction in motion?

Back

Friction is a force that opposes motion between two surfaces in contact, affecting how easily an object can move.