Hey, how do I download it?
This is a warmer, and there is nothing to download. It's just an idea for your lesson, not a worksheet.
When introducing a new topic to class, distribute index cards to every student. On each of the cards a statement on the topic should be written: some true, some false. Students then must decide which statements are true and which are false, using whatever means they desire: their text, each other’s knowledge base, the Internet, etc. With this method, students get introduced to the topic and clarify any preconceived notions, correct or incorrect, they have on it while interacting with their peers and even doing a little research.