Check It Twice: teacher key

How to Check If Something Is True, grade 3 edition, written for 3rd grade. A newspaper once said there was life on the Moon. Learn how to check who wrote a claim, why and when, and why a fact needs two places.

Read the book. Print this page for the key.

Questions and answers

1. What did the 1835 newspaper say?
   • There was life on the Moon (answer)
   • Sun is cold
   • Mars had a king
2. What is a primary source?
   • A first-hand record (answer)
   • A kind of fruit
   • A long book
3. Which is true about the brain?
   • Only a tenth is used
   • Almost every part is used (answer)
   • Half is always off
4. What three things do you look at to check a claim?
   • Who, why and when (answer)
   • Color, size, shape
   • Smell, taste, sound
5. Why should you look in a second place?
   • It is the rule of teachers
   • A true fact can be found in many good places (answer)
   • One place is too small

Words

• source: where facts start
• opinion: what someone thinks
• primary: first-hand
• astronomer: star scientist