7th Grade Q2 QSE Review: 7.7D 7.8A 7.8C

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 an external force.

Front

How does a seatbelt relate to inertia?

Back

A seatbelt helps to counteract inertia by keeping the driver in place during sudden stops or collisions, preventing them from continuing to move forward.

Front

What is net force?

Back

Net force is the overall force acting on an object when all the individual forces are combined. It determines the object's motion.

Front

What does it mean if the net force is 0 N?

Back

If the net force is 0 N, the forces acting on the object are balanced, and the object will not accelerate; it will either remain at rest or continue moving at a constant speed.

Front

Define radiation in terms of energy transfer.

Back

Radiation is the transfer of energy in the form of electromagnetic waves, such as light or heat, without the need for a medium.

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials, where heat moves from the hotter object to the cooler one.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases), where warmer, less dense areas rise and cooler, denser areas sink.

Front

Give an example of convection in everyday life.

Back

An example of convection is the way warm air rises from a heater, cools down, and then sinks back down, creating a circular motion.

Front

What happens to a hot liquid when it is heated?

Back

When a hot liquid is heated, it expands, becomes less dense, and rises.

Front

What is the relationship between temperature and energy transfer?

Back

Temperature is a measure of the average kinetic energy of particles in a substance. Heat energy transfers from areas of higher temperature to areas of lower temperature.