If you ever go to a conference for science teachers, you'll see a lot of teachers wearing t-shirts with this famous science joke on them. Knowing what you know about atoms, explain what they mean when they say that atoms "make up everything".

Is british society today better than it was 400 years ago?

According to the federal regulations, which of the following studies meets the definition of research with human subjects? a. a researcher uses the customs office’s passenger lists for ships bringing immigrants to the us between 1820-1845 to track the numbers of immigrants from certain ethnic groups.b. a researcher conducts a linguistic study of comments posted on a local public blog.c. a developmental psychologist videotapes interactions between groups of toddlers and their care givers to determine which intervention methods most effectively manage aggression.d. a researcher asks the director of a local free clinic about the number of patients in the last two years with newly diagnosed hiv/aids.

Restricting immigrants from entering a country may be based on what belief?