Post Test 2 - Science

The graph below describes the motion of an object. Which of the following statements is true?

• The object is moving with a negative acceleration.

• The object has a constant velocity.

• The object is moving with a positive acceleration.

• The object has a constant position.

Denver constructs an electric bell as shown in the diagram below. He then turns the switch on to test the bell. Denver notices that the hammer moves a bit toward the gong, but does not quite reach the gong. Which of the following should Denver do to best increase the chances of making the bell ring?

• increase the length of the arm supporting the hammer and use a heavier hammer

• decrease the size of the gong and use a larger hammer

• decrease the size of the gong and the number of coils around the electromagnet

• increase the current produced by the battery and the number of coils around the electromagnet

What caused this gas to come together and form the Sun?

• The atoms of gas were pulled together by the force of gravity.

• The atoms of gas were attracted to the center of a black hole.

• The magnetic forces from stars moved the atoms of gas together.

• The planets pushed the atoms of gas toward each other.

Which of the following is true about the Earth's natural resources?

• The natural resources on Earth can never be used up because humans can always make more resources to replace them.

• The same natural resources are available in all areas of the Earth because the geologic processes that formed them occurred the same way in every location.

• Natural resources are unevenly distributed on Earth because the geologic processes that formed them occurred in different locations over time.

• Natural resources were once formed by geologic processes inside the Earth, but they are now created only by human-made processes.

Which of the following is a force that acts at a distance?

• gravity

• static electricity

• magnetism

• all of these

Which of the following is true about the locations of earthquakes, volcanoes, and tectonic plate boundaries?

• Neither earthquakes nor volcanoes are located near plate boundaries.

• Earthquakes and volcanoes are both commonly located near plate boundaries.

• Volcanoes are commonly located near plate boundaries, but earthquakes are not.

• Earthquakes are commonly located near plate boundaries, but volcanoes are not.

Which statement best describes how data from a spectroscope can be used to provide information about the Solar System?

• A spectroscope records sounds produced by the movement of planets, and this data can be used to determine the movement of the planets in relation to Earth.

• A spectroscope records sounds produced by the movement of planets, and this data can be used to find the distance between two planets.

• A spectroscope measures properties of light reflected by planets, and this data can be used to calculate the age of each planet compared to the age of Earth.

• A spectroscope measures properties of light reflected by planets, and this data can be used to identify the rate at which each planet rotates

To determine the location of an earthquake's epicenter, scientists measure the arrival times of _______ waves, which arrive first, and _______, which arrive second.

• S; surface

• P; S

• S; P

• surface; P

Which of following are natural factors that can cause extinctions?

• I, II, and III only

• I, II, III, and IV

• I and IV only

• II and III only

Rock layers are formed over the course of many years. The image below shows the types of fossils that have been found in different layers of rock. Based on this information, what does the fossil record show?

• Newer rock layers contain fossils of more complex organisms than the oldest rock layers.

• Newer rock layers contain fossils of every organism that ever lived on Earth.

• Older rock layers contain fossils of every organism that ever lived on Earth.

• The oldest rock layers contain fossils of more complex organisms than newer rock layers.