Math And Science

Did I ever mention that blogging is really quite fun? Especially, when class FE7B has started new units in both math AND science! Well actually in math, we are almost finished our unit on Ratios and Rates already. Ratio: The comparison of two quantities. Rate: The comparison of two quantities with different units of measurement. Unit Rate: A rate with the second term being only one unit. For example 10km/h. We have been learning how to convert and compare all of these ratios and rates. Here is a problem that class FE7B could encounter in this unit.

Sheila ran 3km in 15 minutes. Stacy ran 4000m in 20 minutes. Stacy said that she ran faster than Sheila did. Is Stacy right?
The first step is to convert these rates into the same unit of measurement. IF we know 1000m = 1 km then we also know that 4000m= 4km.
The second step is to convert both rates into their simplest form. 3 divided by 3 equals 1, so 15 divided by three equals 5. What ever you do to one term, is applied to the other term as well. 4km divided by 4 equals 1 and 20 divided by 4 equals 5.
The rates are both 1km/5 minutes.
So, the answer is: No, Stacy is not right. Both Sheila and Stacy ran the same speed.

For science we have really gotten into the unit on pure substances and mixtures. Not only has class FE7B been learning very valuable note taking skills, but we have been connecting previous knowledge to newly learned information. Here are some key words that we have learned.
Heterogeneous- A mixture with two or more different sets of properties. Homogeneous- A mixture that's parts all have the same composition and properties. Pure Substance- Materials whose properties are not a blend, but are all the same. All of the particles are identical and the properties are effected by particles.
An example of a homogeneous mixture is kool aid mix with water
An example of a heterogeneous mixture is oil and vinegar
An example of a pure substance is gold.

That is basically all of what class FE7B has covered. I'll write next week!