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What is one way people are helping the
environment?
A. They are planting trees to replace the
ones that are cut.
B. They are building more roads so more
people can see natural areas.
C. They are building more dumps to hold
the trash we create.
D. They are using their cars more to get
to places faster.

Which object in the sky is a satellite of
the planet Earth?
A. Sun
B. Moon
C. Mars
D. Saturn

The radiant energy that comes to Earth
from the Sun is
A. only one wavelength that we see as
yellow.
B. a narrow band of wavelengths that
is entirely visible light.
C. mostly long wavelengths that
become heat energy.
D. a range of many wavelengths from
long to very short.

Use the picture below to answer the following question.
The cactus plant shown above lives in a desert environment.
Which characteristic of this plant could be found in many other desert plants?

A. a deep root system for gathering water
B. lush growth that serves to trap water if it rains
C. broad leaves that protect the plants from the hot sun
D. leaves and stems that are adapted to conserve water