Victory for the ACT Student Text 15e

330 • S CIENCE

DIRECTIONS: Each passage below is followed by several items. After reading a passage, choose the best answer to each item. You may refer to the passages as often as necessary. You are NOT permitted the use of a calculator. Š‹• •‡…–‹‘…‘–ƒ‹• –™‘…‹‡…‡ “—‹œœ‡•Ǥ Š‡ ϐ‹”•– “—‹œ ‹• ƒ †‹”‡…–‡† •–—†› “—‹œǤ Š‡ †‹”‡…–‡† study quiz is not timed. Answer each question and check your work as you go. The second quiz is a timed quiz. Take the second quiz under the indicated timed conditions to practice your pacing as you apply what you learned in the Science Lessons. Passage I The ecological pyramid below shows the relative biomass* of organisms at each trophic feeding level of a marine food chain.

DIRECTED STUDY QUIZ (16 items)

Master Moves When you see a diagram like this, with the same information given for each •…‹‡–‹ϐ‹……‘…‡’–ǡ it is helpful to spend a few moments trying to understand the relationship between all of these concepts. This can help you speed through later questions. For example, in this passage, understanding the relationship between each trophic feeding level helps you quickly answer questions 2, 4, and 5.

*Biomass is the total dry weight of organisms (usable chemical energy stored in organic matter) at each trophic level at any given time.