The passage "Protecting Our Night Skies" describes how the National Park Service works to control light pollution. How does light
pollution affect humans
and the environment? Write at least two paragraphs to describe how light pollution
affects humans and the environment. Use your own ideas and ideas from the passage
to help you write.

Biologists recognize five levels of cell organization. the lowest and simplest is the cellular level. organisms here are either unicellular organisms, like protozoa, or colonial organisms. colonial organisms are composed of single-celled individuals that stay together to sustain the life of the whole colony. next on the scale of complexity is the level occupied by tissue. a tissue is a group of similar cells which perform a similar activity. tissues that are organized around a common function together make up an organ, the third level of complexity. the fourth level of organization is the system, formed by a group of organs which together perform a specific bodily process. the fifth and highest level is the organism level, in which body systems work together in a structure capable of independent life. main idea:

The basketball crashed against the backboard, and point guard sheena lunged for it. as she snatched the ball out of mid-air, the crowd cheered, chanting encouragement for her team, the monarchs. so far, the game had been a disaster. with 15 seconds left to go in the final quarter, the monarchs were 2 points shy of victory. what main idea do the details in the passage suggest? the point guard sheena was not a very good player. the monarchs had never lost a basketball game. the monarchs were worried about losing. the crowd was not supporting the monarchs.

What task did the surveyors do? a. they studied the landscape to determine the most direct route for building a road. b. they designed treadmills that lifted blocks of stone to where they were needed. c. they dug trenches and filled them with sand, concrete, and large blocks to form a road.