PSSA Science Practice

Front

What are Newton's Laws of Motion?

Back

Newton's Laws of Motion are three physical laws that together form the foundation for classical mechanics. They describe the relationship between a body and the forces acting on it, and the body's motion in response to those forces.

Front

What is gravitational potential energy?

Back

Gravitational potential energy is the energy an object possesses because of its position in a gravitational field. It is greatest at the highest point in a gravitational field.

Front

What is a lunar phase?

Back

A lunar phase is the appearance of the illuminated portion of the Moon as seen from Earth, which changes in a cycle of about 29.5 days.

Front

What is an inference?

Back

An inference is a conclusion reached based on evidence and reasoning rather than from explicit statements.

Front

What is the significance of the direction in which an object moves?

Back

The direction of movement is significant as it indicates the path an object takes and can affect the forces acting on it.

Front

What is Boyle's Law?

Back

Boyle's Law states that the pressure of a gas is inversely proportional to its volume when temperature is held constant.

Front

What is Mendel's Law of Inheritance?

Back

Mendel's Law of Inheritance describes how traits are passed from parents to offspring through genes.

Front

What is the formula for calculating force?

Back

Force (F) is calculated using the formula F = mass (m) × acceleration (a).

Front

What is the role of gravity in motion?

Back

Gravity is a force that attracts two bodies towards each other, influencing the motion of objects, especially in free fall.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.