Science
Today we did a simple investigation to show the affect of adding heat to air. What happened to the balloon when we put the bottle in warm water? Why?
Think about the molecules/particles of air. What does heat do to them? It gives them more energy so they move faster and EXPAND (move further apart). That's why the air moves into the balloon. Some of you also noted that warm air rises. It rises because the molecules are further apart (less dense).
What happened when we put the bottle in ICE water? The balloon deflated, but what happened to the bottle? Why did it collapse?
When you take heat away, the molecules of air move slower and are closer together. There are still the same number of air molecules, they are just closer together (take up less space in the bottle).

Math

We reviewed using repeated subtraction to divide in grade 4. Grade 5 found it more difficult to use repeated subtraction with 4-digit dividends. Most grade 5s are feeling more comfortable with the standard algorithm. Keep practicing. 

Grade 4 extra practice:

http://www.math4.nelson.com/quizzes/math4quizzes/m4ch10l4.htm

http://www.math4.nelson.com/quizzes/math4quizzes/m4ch10l8.htm

Grade 5 extra practice: 

http://www.nelson.com/school/elementary/mathK8/math5/quizzes/math5quizzes/gr5_ch6_les6.htm

http://www.nelson.com/school/elementary/mathK8/math5/quizzes/math5quizzes/gr5_ch6_les8.htm

Reminders:

Permission form for end of the year trip to Ontario Science Centre.