Hope investigated the effect of fertilizer on the growth of two plant species, horseweed and sand grass. The control and experimental groups for her study contained both species. All plants were the same height at the start of the study. The plants were grown in a restricted-access area on a sand dune in South Carolina and were watered regularly. Fertilizer was added to the soil surrounding the plants in the experimental group only. The graph shows Hope’s results. Explain how the data in the graph support the idea that genetic factors and environmental factors affect the growth of organisms.

One statements is an example of a scientific observation. another statement is an example of a scientific explanation. identify the correct statement for each category to illustrate how scientific explanations are inferred from scientific observations.

Tara sees a commercial for a brand of pills that promise to boost energy and people perform better in work and school. as people in the commercial talk about how much better they feel when taking the pill, tara notices a message on the bottom of the screen that reads, "this pill is not approved by doctors and has not been tested in controlled experiments." what is the best conclusion that tara should make about the commercial? it is making scientific claims based on subjective observations. it is making scientific claims based on opinions instead of pseudoscientific facts. it is making pseudoscientific claims based on objective observations. it is making pseudoscientific claims based on opinions instead of scientific facts.

Which greenhouse gas is emitted when burn fossil fuels for energy? a.nitrogen b.oxygen c.carbon dioxide d.helium