<span>Which of these tools can be used by archeologists to find fossils? </span><span>An aerial photograph
</span><span>Which of the following describes a function of a satellite? </span><span>Helps scientists track weather
</span><span>Which of these can vary in length of time? Era
</span><span>The following examples are primary sources except </span><span>an encyclopedia that provides factual details about the finding of Lucy
</span><span>A historian wonders why an ancient civilization disappeared. He suggests that a natural disaster might have destroyed it thousands of years ago. What step should the historian take next? </span><span>Test the hypothesis </span>
