'Abundant' means plentiful or existing in large quantities.

'Arduous' means requiring a lot of effort, which is similar to 'difficult'.

'Meticulous' means showing great attention to detail, which is similar to 'thorough'.

'Transient' means lasting for a short time, which is similar to 'temporary'.

The word 'skill' indicates proficiency in problem-solving.

The word 'optimistic' fits best as it indicates a positive outlook on winning.

Sound requires a medium (solid, liquid, or gas) to travel; in a vacuum, there are no particles to transmit sound waves.

A 'gregarious' attitude is sociable and friendly, which would make someone popular.

A 'deliberate' decision-making process is careful and considered, which fits the context.

The context suggests that the new evidence confirms the scientist's findings, making 'supported' the best choice.

The word 'accomplishment' reflects a positive feeling after finishing a marathon.

The word 'eager' suggests a strong desire to complete the homework.

Refraction is the bending of light as it passes from one medium to another due to a change in speed.

The most logical option is 'mat' as it is a common place for a cat to sit.

The word 'excited' describes the children's feelings about the circus.

Potential energy is the energy stored in an object due to its position or configuration.

Drag is the force that opposes the motion of an object through a fluid, such as air or water.

The law of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.

Temperature is a measure of the average kinetic energy of the particles in a substance.

Temperature is a measure of the average kinetic energy of the particles in a substance.

The word 'boring' explains why everyone would leave the theater.

Diffraction is the bending of light waves around obstacles and openings.

Diffraction is the bending of light waves around obstacles and openings.

Bernoulli's Principle states that an increase in the speed of a fluid occurs simultaneously with a decrease in pressure.

Sublimation is the process where a solid changes directly into a gas without passing through the liquid state.

Power is defined as the rate at which work is done or energy is transferred.

The word 'discovery' indicates a positive contribution to genetics.

The word 'quiet' is appropriate as it is expected behavior during a lecture.

The unit of electric current is the Ampere, which measures the flow of electric charge.

The word 'pleasant' indicates good weather suitable for a picnic.