Q: Which three systems of the human body function together to move and control body parts?
A: nervous, skeletal, and muscular
Q: Which of the following correctly orders part of a fish's respiratory system from the least complex to most complex?
A: cells -> tissues -> gills
Q: Scientists measured the patterns of spectral lines given off by distant galaxies and concluded that almost all of these galaxies are moving away from Earth. What did the scientists observe directly?
A: a shift toward longer wavelengths of light
Q: Why can a small fire be put out by placing a heavy blanket over it?
A:
This keeps oxygen from reaching the fire.