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<catalog>
	<question>
		<phrase isaudiomp3="1" mp3="AUDIO_REPOS/4.0.mp3"></phrase>
		<question isaudiomp3="1" rationale="0" picture="images/question4.jpg" mp3="AUDIO_REPOS/2061-4" exercise_type="" questionmode="" choicemode="" answerbankid="" answerbankmode="" rationalemode="" playonload="" mp3speed="" ttsspeed="" passage="1" show_passage="" show_passage_audioplayer="" passage_audio_type="" showvideo="" video="" enable_audio_recorder="" recorder_mode=""><![CDATA[The meteorites arrive in pretty rough shape.]]></question>
		<saythis><![CDATA[]]></saythis>
		<answer isaudiomp3="1" picture="images/c1.jpg" mp3="AUDIO_REPOS/2061-1" isrationalemp3="1" rationalemp3="AUDIO_REPOS/right.mp3" rationaleimage="images/rationale/4.1.jpg" rationale="Right" value="1" choicesay=""><![CDATA[The meteorites arrive in pretty rough shape.]]></answer>
		<answer isaudiomp3="1" picture="images/c1.jpg" mp3="AUDIO_REPOS/2061-1" isrationalemp3="1" rationalemp3="AUDIO_REPOS/right.mp3" rationaleimage="images/rationale/5.1.jpg" rationale="Right" value="1" choicesay=""><![CDATA[They get toasted as they fall through the atmosphere.]]></answer>
		<answer isaudiomp3="1" picture="images/c1.jpg" mp3="AUDIO_REPOS/2061-1" isrationalemp3="1" rationalemp3="AUDIO_REPOS/right.mp3" rationaleimage="images/rationale/6.1.jpg" rationale="Right" value="1" choicesay=""><![CDATA[Still, these meteorites provide a lot of information to geologists, whose job it is to study rocks.]]></answer>
		<answer isaudiomp3="1" picture="images/c1.jpg" mp3="AUDIO_REPOS/2061-1" isrationalemp3="1" rationalemp3="AUDIO_REPOS/right.mp3" rationaleimage="images/rationale/7.1.jpg" rationale="Right" value="1" choicesay=""><![CDATA[But it can be hard for geologists to make sense of what they see when they can't agree on how old a rock is.]]></answer>
		<answer isaudiomp3="1" picture="images/c1.jpg" mp3="AUDIO_REPOS/2061-1" isrationalemp3="1" rationalemp3="AUDIO_REPOS/right.mp3" rationaleimage="images/rationale/8.1.jpg" rationale="Right" value="1" choicesay=""><![CDATA[And when it comes to certain rocks, scientists disagree by as much as 4 billion years.]]></answer>

	</question>

	<question>
		<phrase isaudiomp3="1" mp3="AUDIO_REPOS/25.0.mp3"></phrase>
		<question isaudiomp3="1" rationale="0" picture="images/question25.jpg" mp3="AUDIO_REPOS/2061-25" exercise_type="" questionmode="" choicemode="" answerbankid="" answerbankmode="" rationalemode="" playonload="" mp3speed="" ttsspeed="" passage="1" show_passage="" show_passage_audioplayer="" passage_audio_type="" showvideo="" video="" enable_audio_recorder="" recorder_mode=""><![CDATA[To figure out how old a rock is, scientists measure certain radioactive elements inside it.]]></question>
		<saythis><![CDATA[]]></saythis>
		<answer isaudiomp3="1" picture="images/c1.jpg" mp3="AUDIO_REPOS/2061-1" isrationalemp3="1" rationalemp3="AUDIO_REPOS/right.mp3" rationaleimage="images/rationale/25.1.jpg" rationale="Right" value="1" choicesay=""><![CDATA[To figure out how old a rock is, scientists measure certain radioactive elements inside it.]]></answer>
		<answer isaudiomp3="1" picture="images/c1.jpg" mp3="AUDIO_REPOS/2061-1" isrationalemp3="1" rationalemp3="AUDIO_REPOS/right.mp3" rationaleimage="images/rationale/26.1.jpg" rationale="Right" value="1" choicesay=""><![CDATA[But if a big crash or explosion melts the rock down, that evidence gets erased.]]></answer>
		<answer isaudiomp3="1" picture="images/c1.jpg" mp3="AUDIO_REPOS/2061-1" isrationalemp3="1" rationalemp3="AUDIO_REPOS/right.mp3" rationaleimage="images/rationale/27.1.jpg" rationale="Right" value="1" choicesay=""><![CDATA[That's why scientists picked the tiny baddeleyites: They are hard little minerals.]]></answer>
		<answer isaudiomp3="1" picture="images/c1.jpg" mp3="AUDIO_REPOS/2061-1" isrationalemp3="1" rationalemp3="AUDIO_REPOS/right.mp3" rationaleimage="images/rationale/28.1.jpg" rationale="Right" value="1" choicesay=""><![CDATA[It's not easy to melt them down.]]></answer>
		<answer isaudiomp3="1" picture="images/c1.jpg" mp3="AUDIO_REPOS/2061-1" isrationalemp3="1" rationalemp3="AUDIO_REPOS/right.mp3" rationaleimage="images/rationale/29.1.jpg" rationale="Right" value="1" choicesay=""><![CDATA[By looking at the radioactive uranium and lead in this tough rock, the scientists found that it formed sometime around 187 million years ago.]]></answer>
		<answer isaudiomp3="1" picture="images/c1.jpg" mp3="AUDIO_REPOS/2061-1" isrationalemp3="1" rationalemp3="AUDIO_REPOS/right.mp3" rationaleimage="images/rationale/30.1.jpg" rationale="Right" value="1" choicesay=""><![CDATA[This proved that the baddeleyites were young.]]></answer>
	</question>
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