Forces review

We took notes on forces and how gravity affects objects. In class, we also completed a studyguide on gravity.

Reminder that the homework for the week is due tomorrow.

Mass vs. Weight

Continuing with our investigation on forces, today had us looking at gravitational force. Through the class activity and discussion you should now understand the difference (and relationship) between mass and weight.

Have completed for tomorrow: both data tables (5.1 & 5.2) and graphs for each.

Quiz tomorrow!

Investigating elastic force

This week our investigations will lead us to thinking about forces. Today, we looked at the force needed to stretch a rubber band. There are 2 questions we want to answer:

1. What happens to the force required to stretch a rubberband when the stretching distance is doubled?
2. Based on the graph, is there a relationship between the force needed to stretch the rubberband and the distance it stretches?

Please have your data graphed for tomorrow's discussion.

Also, HW for the week has been assigned today. See Class Info for a link to the assignments. Keep in mind that work not finished in class may be assigned as additional homework.

QUIZ WEDNESDAY! Study parts of a battery, energy forms and transformations.

Classifying energy

Energy can be placed into two groups: potential (stored energy) and kinetic (energy in motion).

Homework: Complete both worksheets on energy and transformations. You may skip the side labeled Alternative Energy. We will do that one together.

Toys and Science

What's the connection? Hopefully you discovered through our energy show and tell that toys require energy to move. Tomorrow we will look at the specific forms of energy.

We also completed Inquiry 4 in class. For homework, complete your graph (if not done last night) and the reflection questions on pg 29.

Charge time vs lit time

These were our independent and dependent variables for our investigation today. You should have copied down the class data.

Do the following for homework:

• Find the average for each charge time.
• GRAPH ONLY THE CLASS AVERAGES
• Do not connect the dots. You may connect them using a curve or a line of best fit. If you do not understand this step we will do it together in class tomorrow.

Rechargable batteries

In today's inquiry you had the opportunity to work with rechargable batteries, a light bulb and a small motor. You may have had success with either the light bulb, the motor or both. Don't worry if you did not have success. The purpose of the investigation was to understand how energy is stored, used and replaced in rechargable batteries. Keep in mind if your battery worked or not: what does that mean in terms of energy within the battery?

Homework: Complete Inquiry 3 reflection questions pg 23 A-G.