Do Now:
Please copy any homework listed below into your agenda.
Choose and answer for the problem on the board.
Homework to be completed:
Finish any incomplete classwork.
Quiz on energy forms and changes this Thursday.
study guide notes below
Blooket linked as well!
Cells brainPOP due tomorrow.
Today’s agenda:
Check and Review “Intro to sexual Reproduction RaTN”
Key Notes and Concepts - fill out the companion worksheet as we discuss
Sexual reproduction
two parents contribute genetic information to create an offspring
sex cells - egg and sperm (female, male)
each carries half of the genetic information needed
fertilization - process of sperm combining with egg
creates a zygote (a fertilized egg)
Sexually reproducing organisms have two categories of cells
body cells (almost all cells in organism)
sex cells (only used for reproduction)
Diploid cells
are body cells
most numerous (by far) in organism
have full set of genetic information
pairs of homologous chromosomes
homologous - similar genes located in similar chromosomes in same location
differ only in the gentic information each gene carries for its trait
ex. an eye color gene might have information for blue, grown, green, etc.
Chromosomes
strings of many genes made of DNA in nucleus
A way to organise the DNA and its genetic information
found in pairs in sexually reproducing organisms
inherited - one from each parent
Each type of organism has a different number of chromosomes
humans - 23 pairs
fruit fly - 4 pars
dog - 39 pairs
fern - 63- pairs
Energy Froms and Changes: Quiz study Guide
Quiz Thursday
Quiz Blooket
Work:
tranferring energy to an object
caused by applying a force through some distance
ex. pushing a table with a force of 100N across a floor 1 meter is work.
forms of energy
potential - stored energy
gravitational - stored by gravity and height
elastic - stored by stretching/compressing certain materials
chemical - stored in bonds between atoms
foods and fuels are sources of chemical potential energy
nuclear - stored in the nucleus of atoms
kinetic - energy of motion
thermal - vibration of atoms in a substance due to temperature
sound - vibration of atoms in air
electric - flow of electric current (electrons) through wires
Mechanical - total of KE and PE in any system of parts
Radiant - light energy, electromagnetic radiation
light (visible, infrared, ultra violet
microwaves
X-rays
radiowaves, etc.
Energy Transformations
conversion of one form of energy into another.
any form of energy can be transformed into any other - though it may require more than one step.
Kinetic becomes potential when an object increases it’s hight and loses speed.
Potential becomes kinetic when an object loses height and gains speed.
Conservation of Energy
during any energy transformation - the total energy does not change
total energy before the transformation equals the total energy after the transformation
energy is neither created nor destroyed