Answer all of the following questions: • What are the size ranges for cobbles? (2pts)
• What stream velocity do you need to carry a particle with a size of 0.02cm? (3pts)
• What stream velocity is needed to move a pebble of the smallest possible size? (3pts)
• Which type or types of sediments can be carried by a river with a velocity of 5 cm/s? (2pts)

What kind of seafood would you expect to have the highest levels of mercury and why? kelp, because they use the sun to photosynthesize on the bottom trophic level. oysters, because they filter feed on plankton on a lower trophic level. small fish, because they eat plankton on a higher trophic level. sharks, because they feed on organisms on a higher trophic level.

Guard cells control which event? the growth of plants capture of solar energy gas exchange in leaves water absorption in roots

When a doggo starts to pace around in the same line for a hand full of days. what would that mean?