Science Review-Physical Science

Evaporation is the process by which a liquid turns into a gas at its surface.

Matter is defined as anything that has mass and occupies space (volume).

Mass is the measure of the amount of matter in an object, which remains constant regardless of gravity.

Texture refers to the physical feel or appearance of a surface, such as rough, smooth, or bumpy.

Friction is a force that opposes motion. If the box is pushed to the left, friction acts in the opposite direction, which is to the right.

Melting occurs when a solid absorbs thermal energy, causing its particles to move more freely and transition into a liquid state.

A mixture is defined as two or more substances combined such that each retains its own chemical identity.

Light waves can reflect (bounce off surfaces), refract (bend when changing media), and travel through a vacuum (empty space). Therefore, all these properties apply.

Mechanical energy is the sum of potential and kinetic energy. An object in motion, like Simba running, possesses kinetic energy, which is a form of mechanical energy.

Balanced forces are defined as forces that are equal in magnitude and opposite in direction, resulting in no net force. Unbalanced forces cause a change in motion.

Volume is the measure of the amount of three-dimensional space an object occupies. Mass measures the amount of matter, and weight measures the force of gravity on that mass.

As an arrow is pulled back in a bow, work is done to deform the bow, which stores energy as elastic potential energy. Therefore, the potential energy increases.

Gravity is the fundamental force of attraction that pulls objects toward the center of a massive body like the Earth. The other options are either fictional or unrelated to this specific gravitational pull.

An insulator is a material with high electrical resistance that prevents or significantly slows the flow of electric current. Conductors allow electricity to flow easily.

According to the law of electrostatics, opposite charges (positive and negative) exert an attractive force on each other. Like charges repel.

Weight is defined as the force exerted on an object due to gravity. Mass is the amount of matter in an object and is constant regardless of gravity.

Pitch is determined by the frequency of a sound wave. Higher frequency vibrations result in a higher pitch, while lower frequency vibrations result in a lower pitch.

The law of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another. Therefore, changing forms is the correct description.