WGU Integrated-Physical-Sciences Exam Dumps

The grocery store manager's assumption that visibility of items increases how often they are purchased is a hypothesis. A hypothesis is a testable prediction or explanation that can be investigated through experiments or observations. In this case, the manager's idea can be tested by placing items in different locations and measuring their sales. Reference:

Integrated Physical Sciences, Chapter 1: The Nature of Scientific Inquiry

When a scientist's results differ significantly from those reported by others, the appropriate action is to perform the experiment again. Repeating the experiment helps to ensure that the results are accurate and reliable. It allows the scientist to verify their findings and check for any possible errors in the experimental process. Reference:

Integrated Physical Sciences, Chapter 2: Methods of Scientific Investigation

V-shaped valleys are typically formed by the erosive action of rivers and streams over a long period. The flowing water cuts down into the bedrock, creating a valley with a characteristic V-shape. This process of vertical erosion is most effective in the upper course of a river, where the gradient is steep and the water flow is fast.

Integrated Physical Sciences materials on erosion and landform development.

Geomorphological studies on river valley formation.

**Assumption:** The collision is completely elastic, meaning no kinetic energy is lost. - **Principles of elastic collisions:** In an elastic collision, both momentum and kinetic energy are conserved. - **Velocity changes:** When two identical cars collide elastically, the car that was moving faster (rear car) will transfer some of its kinetic energy to the slower-moving car (front car). As a result, the rear car slows down, and the front car speeds up. - **Conclusion:** The velocities of the two cars will change such that the front car speeds up and the rear car slows down after the collision. **Reference:** Textbooks on classical mechanics, principles of conservation of momentum and energy, and problem-solving resources on elastic collisions.

Definition of Substance Types:

Element (A): A pure substance consisting of only one type of atom.

Compound (B): A substance formed when two or more elements are chemically bonded.

Isotope (C): Atoms of the same element with different numbers of neutrons.

Mixture (D): A combination of two or more substances that are not chemically bonded.

Composition of Sand: Sand is composed of various small rock and mineral particles, which are physically combined but not chemically bonded.

Conclusion: Sand is a mixture.

Properties of Mixtures: Characteristics and examples of mixtures in physical science.