Indicate whether each source is reliable or unreliable.
a scientist who studies dinosaurs presents her research on velociraptors at a science
convention
a chemistry teacher discusses plant cells on his personal blog.
an advertisement for weight-loss pills in a magazine claims that you will lose 10 lbs in
one week
an article discusses photosynthesis in an encyclopedia.
an article discusses salmonella on the centers for disease control and prevention
(cdc) website.