Human Reproduction

As we enter the final week of Unit 5: Inheritance and Meiosis, we turn our attention toward the process of reproduction.  Class begins with a video which explains the process of human fertilization.  After a brief class discussion about what was learned and what questions remain, students were assigned a reading from the textbook along with the questions below:

In the BSCS textbook, read “Making More People” (p.477-481)

  1. How many ova are found in the ovaries of a newborn baby?
  2. How many ova mature into healthy ova?
  3. Where and when do ova begin maturing?
  4. Where are mature ova fertilized by sperm?
  5. Where are sperm formed?
  6. How long does it take an individual sperm to develop?
  7. How do sperm obtain the energy to swim through the female reproductive tract?
  8. How and why does the male body regulate testicle temperature?
  9. Explain the difference between a zygote, an embryo, and a fetus.
  10. What determines when a woman is ready to begin labor?

Turn in your response for credit and review the Reproductive Strategies Project assignment that we will formally begin as a class tomorrow.

Balancing Chemical Equations

Class began with the ChemCatalyst from the Lesson 72 PowerPoint.  With the lesson focusing on balancing chemical equations, we worked through the ChemCatalyst equation with a focus on differentiating coefficients and subscripts (slides 11 and 12).  We practiced balancing a few more equations and then students received the Lesson 72 Worksheet to work through.  For homework, students were assigned questions 2 and 4 from the textbook.

For students who would like additional instruction around balancing equations and enjoy learning by watching videos, I recommend Tyler DeWitt’s videos Introduction to Balancing Equations (above) and Balancing Chemical Equation Practice Problems (below):