Semester Exam Review

Front

What is the purpose of airbags in vehicles?

Back

Airbags are designed to inflate during a collision to protect passengers from injury by cushioning their impact with the vehicle's interior.

Front

What is Newton's second law of motion?

Back

Newton's second law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (F=ma).

Front

What is a dependent variable in an experiment?

Back

The dependent variable is the factor that is measured or observed in an experiment, which changes in response to the independent variable.

Front

What is a chemical reaction?

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances into another, often involving the breaking and forming of bonds.

Front

What happens to water molecules when jeans dry on a clothesline?

Back

The water molecules gain energy, move faster, and evaporate into the air.

Front

What is the role of crash test dummies in vehicle safety testing?

Back

Crash test dummies simulate human bodies in crash tests to assess the safety of vehicles without risking human lives.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form or appearance of a substance without changing its composition, while a chemical change results in the formation of new substances.

Front

What is the significance of measuring distance in an experiment?

Back

Measuring distance helps determine the effect of variables on motion and allows for the analysis of relationships between different factors.

Front

What materials are commonly used in crash test dummies?

Back

Crash test dummies are typically made from materials that mimic human anatomy and are designed to withstand impact forces.

Front

What is the importance of repeatability in scientific experiments?

Back

Repeatability ensures that results are consistent and reliable, allowing for validation of findings and conclusions.