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

Looking at the graph, the line representing the human population (assuming the main line as it's the thickest and likely the overall population) is going upwards from 1940 to 2015. A carrying - capacity would show a flattening (logistic growth), a decreasing trend would have a downward - sloping line, and no trend would be a random or flat line. Since it's going up, it's an increasing trend.

A hypothesis is not a final interpretation (that's a theory after extensive testing), a condition that fits facts (more like an observation or a conclusion from data), or a wide range of evidence (that's more like a body of knowledge). A hypothesis is a specific, testable statement that answers a scientific question. For example, “If plants are exposed to more sunlight, then they will grow taller” is a testable statement.

In an ecosystem, producers (like plants) convert solar energy into chemical energy through photosynthesis. All other organisms (consumers) get their energy either directly (primary consumers eating producers) or indirectly (secondary and tertiary consumers eating other consumers) from the producers. The base of the energy pyramid (producers: 10,000 lbs in the given pyramid) shows their fundamental role as the energy source.

Answer:

C. The human population had an increasing trend between 1940 and 2015.

Question 4