Untitled Title Josiah uses a pencil called Brand He has pencil smears on his paper every time he completes an assignment and he hates this! Caleb using a pencil called Brand B. Josiah notices Caleb never has smears on his paper Josiah wonders if it's the brand of pencil that's keeping Caleb from getting smears on his paper. He decides to borrow Caleb's pencil and test the brand against his to find out what is control group?

stratosphere: as the altitude increases, the air temperature increases. the stratosphere has a layer of ozone, called the ozone layer. this layer absorbs most of the ultraviolet radiation from sunlight. this results in the stratosphere being warmer.

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]

a lot of people sadly don't know the best way to learn is cheating off of your friends or this amazing thing called google