Question

1. human population graphs: united states, california, and south dakota (1939 - 2012)

the graph above shows the trends of the human population between 1940 to 2015.
what trend or pattern did the human population follow?
a. the human population had reached its carrying capacity between 1940 and 2015.
b. the human population had a decreasing trend between 1940 and 2015.
c. the human population had an increasing trend between 1940 and 2015.
d. the human population didnt follow a trend between 1940 and 2015.

1. which of the following phrases best defines a hypothesis?

a. a satisfactory final interpretation of a puzzling natural phenomenon
b. a condition that best fits the known facts
c. a specific, testable statement that answer a scientific question
d. a wide range of observations and evidence

1. what is the basis of all energy in the ecosystem?

a. the bee, grasshopper, and prairie dog

Explanation:

• Question 3: By observing the graph, we can see that the population curve is rising over time. A rising curve indicates an increasing trend.
• Question 4: A hypothesis is a specific, testable statement that answers a scientific question. It is not a final interpretation (A), just a condition that fits facts (B is too vague), and not a collection of observations (D).
• Question 5: Producers (like plants) convert sunlight into chemical energy through photosynthesis. All other organisms (consumers) get their energy directly or indirectly from producers.

Answer:

1. C. The human population had an increasing trend between 1940 and 2015.
2. C. A specific, testable statement that answer a scientific question.
3. Producers (as they are the base of the energy pyramid and convert solar energy into chemical energy for the ecosystem).