Grade 7 agenda:
Complete the Forms of Energy - and Key Concept Builder handouts - due tomorrow
Please prepare for a quiz
clean up desk space
get a writing instrument ready
quietly study your flashcards
Go over Mini-lab worksheet
Work is a transfer of energy by exerting a force through a distance
if either is zero - no work is accomplished
moving objects do work when they exert a force on another object during a collision
Quiz on unit vocabulary
When finished: Log into your McGraw Hill Textbook and complete the following
Reading: Other forms of Energy(page 389)
Complete the Forms of Energy - and Key Concept Builder handout - due tomorrow
Grade 8 Agenda
Worksheets (2) due Thursday
Take out your notes on Why is Meiosis important and How do Meiosis and Mitosis differ?
SLANT: Why is meiosis important?
meiosis forms sex cells
haploid (half of the chromosomes)
when two sex cells join this makes a diploid cell (zygote)
diploid cells are body cells and can grow into an organism
big idea! Meiosis maintains diploid cells in sexually reproducing organism.
big idea! Meiosis creates genetic variety in offspring.
each sex cell has a different half set of chromosomes from all others
Crossing over and random assortment of chromosomes make certain no to sex cells are exactly alike
Variety supports health and helps a species adapt when conditions change.
both mitosis and meiosis start with diploid cells – but differ from there
meiosis undergoes one division and produces two diploid cells that are identical to the parent
this allows growth and repairing organisms
mitosis undergoes two divisions and produces four haploid cells that are different from each other
this make certain offspring all inherit different genetic information from each other creating variety