Important WGU Integrated Physical Sciences (MTC1) Exam Questions

Answer: C

Explanation:

When experimental results contradict current theories, it is essential to conduct additional experiments to confirm the findings. This approach ensures that the results are not due to experimental error and provides a robust basis for re-evaluating or potentially modifying existing theories. Scientific theories are refined and improved based on new, reliable evidence. Reference:

Integrated Physical Sciences, Chapter 2: Methods of Scientific Investigation

Answer: D

Explanation:

According to the law of conservation of matter, the mass of the reactants in a physical or chemical process must equal the mass of the products. When ocean salt is dissolved in pure water to prepare a saltwater tank, no matter is lost or gained; it is simply dispersed. Hence, the total mass of the pure water and the added salt (the reactants) will be equal to the mass of the resulting saltwater mixture (the product).

Integrated Physical Sciences resources on solutions and mixtures.

Principles of matter conservation in physical changes.

Answer: D

Explanation:

GPS technology: Satellites in the Global Positioning System (GPS) communicate with GPS receivers on Earth using electromagnetic waves.

Microwaves: Microwaves are used in GPS technology because they can travel long distances and penetrate the atmosphere with minimal interference.

Conclusion: The type of electromagnetic radiation used to send information from GPS satellites to receivers on Earth is microwaves.

Answer: D

Explanation:

Gravity is the force responsible for the motion of a ball falling from a shelf to the floor. As the ball is released, gravity pulls it downward, causing it to accelerate towards the floor. Reference:

Integrated Physical Sciences, Chapter 3: Forces and Motion

Answer: D

Explanation:

When a truck comes to a stop by applying the brakes, the kinetic energy of the moving truck is converted into thermal energy due to friction between the brake pads and the wheels. This conversion results in the production of heat, which dissipates the energy and brings the truck to a halt. Reference:

Integrated Physical Sciences, Chapter 5: Energy Transformations