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Which of the following can not travel in a vacuum such as space?

• electromagnetic

• sound

• light

• x-rays

Humans depend upon food that comes from the ocean. Some human activities negatively impact these food supplies. Which statement provides the best evidence that human activities contribute to this impact?

• Human visitors to coral reef systems break corals growing on rocks.

• Humans catch marine fish at a faster rate than the fish are able to reproduce.

• Humans raise fish in a hatchery for commercial sale.

• Humans construct artificial reefs to attract tourists.

Which has the LONGEST wavelength and, therefore, the lowest frequency/energy

• Gamma Rays
• Radio Waves
• Visible Light
• Infrared rays

Which element has chemical properties that are most similar to the chemical properties of sulfur, S?

• Silicon, Si

• Chlorine, Cl

• Selenium, Se

• Phosphorus, P

Early one morning students observed the moon as it appeared from Earth. Which diagram shows the correct relative positions of the sun, the moon, and Earth when the moon was in the observed phase?

• 
• 
• 
• 

Sea anemones and clown fish live together in the ocean. Which statement best describes one way sea anemones depend on clown fish for an abiotic factor in an ecosystem?

• Clown fish protect sea anemones from predatory fish.

• Clown fish decrease competition among sea anemones.

• Clown fish consume the remains of organisms paralyzed by sea anemones

• Clown fish move water near sea anemones when dissolved oxygen levels are low.

The picture shows a bicyclist increasing speed while riding down a hill during a bicycle race. Which statements accurately describe the potential and kinetic energy of this bicyclist?

• Kinetic energy increases. Potential energy decreases.

• Kinetic energy increases. Potential energy remains constant.

• Kinetic energy remains constant. Potential energy decreases.

• Kinetic energy remains constant. Potential energy increases.

Two oceanic plates are shown in the image. Which type of boundary results in the spreading of the oceanic ridge?

• Convergent boundary

• Subduction boundary

• Transform boundary

• Divergent boundary

Alpha Centauri appears as a bright object visible in the Milky Way galaxy. Alpha Centauri is actually a system of three objects. Each object produces light and rotates on its own axis. The system is an average of 4 light-years from Earth. Based on this information, the three objects that make up the Alpha Centauri system are all —

• asteroids

• comets

• planets

• stars

Which runner stopped for a rest?

• Albert
• Bob
• Charlie