WGU Integrated-Physical-Sciences Exam Dumps

The given rock layers in the illustration show a sequence from bottom to top: slate (metamorphic), siltstone (sedimentary), sandstone (sedimentary), and basalt (igneous). This sequence indicates the following geologic history:

Metamorphic rock (slate) at the bottom suggests an initial period of high heat and pressure.

Sedimentary rocks (siltstone and sandstone) above the slate indicate subsequent periods of deposition under water.

Basalt (igneous) at the top suggests a volcanic eruption depositing lava that solidified into basalt.

Therefore, the correct conclusion about the geologic history of this area is that it experienced a volcanic eruption and then was located underwater.

Reference

Integrated Physical Sciences: Sedimentary, metamorphic, and igneous rock formation processes.

Geologic history interpretation based on rock layers.

The diagram shows the Earth's position relative to the Sun at different times of the year. In the northern hemisphere, the United States experiences the most direct sunlight during the summer solstice. This occurs around June 21st when the Earth's tilt causes the Northern Hemisphere to be inclined towards the Sun. At this time, the Sun's rays hit the Northern Hemisphere more directly. In the diagram, position C represents the location of the Earth during the summer solstice, where the Northern Hemisphere receives the most direct sunlight.

Reference

Integrated Physical Sciences: Earth's axial tilt and seasonal changes.

Diagram interpretation of Earth's position relative to the Sun.

**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.

The scientist is determining how the speed of flowing water affects the size of sediment particles it can carry by varying the water speed and measuring the sediment sizes. This involves manipulating one variable (water speed) and observing the effect on another variable (sediment size), which is the essence of a controlled experiment. The setting and control of conditions ensure that the experimenter can establish a cause-and-effect relationship. Reference:

Integrated Physical Sciences, Chapter 2: Methods of Scientific Investigation

As comets approach the Sun, the increased solar radiation causes the ice within the comet to evaporate (a process called sublimation), releasing gas and dust particles. This creates a visible atmosphere called a coma, and the solar wind then blows this material away from the comet, forming a tail. The tail always points away from the Sun due to the force of the solar wind. Reference:

NASA's Comet Exploration Missions

'Cometary Physics' - European Space Agency Publications