1. What is the most essential characteristic of a statement for it to be considered a scientific hypothesis?
- A. It must be a question about a natural event.
- B. It must be supported by the scientist's personal opinion.
- C. It must be a testable explanation for an observation.
- D. It must be a well-established and proven scientific law.
2. A scientist hypothesizes that a population of deer is declining due to starvation. Which observation would most directly support this specific claim?
- A. A survey showing an increase in the local wolf population.
- B. Autopsies of dead deer revealing signs of malnutrition like low body fat.
- C. Finding many deer tracks near a new highway built through the forest.
- D. A decrease in the number of hunting permits issued for the area that year.
3. A student observes that the ice on a pond melts faster near the edges than in the center. Which of the following is a testable scientific hypothesis for this specific observation?
- A. The darker soil at the pond's edge warms up and melts the nearby ice.
- B. Ice melting is a very interesting phenomenon to watch during the spring thaw.
- C. Why does the ice near the shore seem to disappear before the ice in the middle?
- D. The overall air temperature is the single most important factor that determines when the entire pond will finally be free of ice.
4. A marine biologist hypothesizes that a new factory's wastewater is causing a decline in a local fish population. Which piece of information would be LEAST relevant for testing this specific hypothesis?
- A. The number of fishing boats operating in the area.
- B. Water quality tests taken upstream and downstream from the factory.
- C. A historical record of the fish population before the factory was built.
- D. Lab studies on how the factory's chemical discharge affects the fish species.
5. To distinguish between the 'Predation' and 'Resource Scarcity' hypotheses for the parrot decline, a scientist sets up cameras. Which type of footage would most clearly support the 'Resource Scarcity' hypothesis?
- A. Footage of cats frequently stalking near parrot nests.
- B. Footage showing parrots and cats drinking from the same water source without interaction.
- C. Footage of parrots successfully fighting off cats.
- D. Footage showing parrots spending a long time searching for food but finding very little.
6. Imagine scientists are investigating if a new disease is causing a decline in a dolphin population. Which of the following would be the WEAKEST piece of evidence to support this hypothesis?
- A. A tourist's report of seeing one sick-looking dolphin.
- B. Veterinary records showing a new pathogen in 60% of stranded dolphins.
- C. A statistical drop in the population coinciding with the first appearance of the disease.
- D. Genetic analysis of tissue samples from deceased dolphins.
7. A scientist is studying the decline of a bee population in a specific region. Which of the following represents the strongest form of scientific evidence to support a hypothesis about the cause?
- A. A local gardener's journal entry noting fewer bees this year.
- B. A collection of news articles about bee declines worldwide.
- C. A single photograph of a dead bee near a recently sprayed field.
- D. Monthly bee population counts from multiple standardized traps across the region over five years.
8. In science, why is an argument based on anecdotal evidence considered weak?
- A. It is always intentionally misleading.
- B. It is usually too complex for others to understand.
- C. It represents isolated instances that may not reflect the overall pattern.
- D. It relies on data from professional scientists only.
9. A student claims that a new type of bird feeder is attracting more cardinals. To move this claim from an anecdotal observation to a strong scientific argument, what should the student do next?
- A. Ask friends if they have also seen more cardinals.
- B. Take one picture of a cardinal at the new feeder.
- C. Set up both old and new feeders and systematically record the number and type of birds at each over several weeks.
- D. Post the claim on social media to see if others agree.
10. Which term best describes the process of using evidence to justify why one scientific explanation is better than another?
- A. Anecdotal reporting
- B. Scientific reasoning
- C. Data fabrication
- D. Hypothesis guessing