Grade 8 Agenda:
Closed notes quiz on unit vocabulary on Tuesday.
Flash cards due Monday
sexual reproduction egg sperm fertilization
zygote haploid diploid homologous chromosomes
Open your notebook and turn to your vocabulary notes on Sexual Reproduction, Diploid cells and Haploid cells
Prepare to take the Open Notes Quiz when instructed.
Review your Mitosis quiz results - released and emailed.
Chapter Content Outline - Diploid and Haploid Cells
Organisms that reproduce sexually form two types of cells.
Body cells have pairs of chromosomes
Chromosomes are in pairs because individuals receive similar chromosomes from each parent
similar means each has genes for the same trait arranged in the same way on the chromosome
because they come from different parents they are similar but not identical
ex. both might have an eye color genes, but Mom’s might be blue and Dad’s might be brown
All 23 human chromosomes are in homologous pairs
humans have 23 pairs of chromosomes (which equals 46)
Having the incorrect number of chromosomes leads to a chromosomal abnormality
3 copies of chromosome 21 causes Down Syndrome
Other organisms have different numbers
Sex cells are different from body cells
sex cells have half the number of chromosomes
only one chromosome from each pair - 23 single chromosomes
sex cells are produced by meiosis
Mitosis Quiz Results review
Conference and study Time
Grade 7 Agenda:
12:35 - 1:05 Period 5
1:05 - 1:35 Period 6
1:35 - 2:05 Period 7
2:05 - 2:10 pack up and transition to cafeteria
Please get out:
your Launch Lab - Can you make a change in matter?
The FORMS OF ENERGY: KINETIC ENERGY AND POTENTIAL ENERGY WORKSHEET
Review Launch Lab
Review FORMS OF ENERGY: KINETIC ENERGY AND POTENTIAL ENERGY WORKSHEET
SLANT: Kinetic and Potential Energy
energy is the ability to cause change
energy is measured in a unit called the joule
kinetic energy is energy due to motion.
It is affected by speed and mass
as speed increases so does kinetic energy
as mass increases so does kinetic energy
Potential energy is energy that is stored due to interactions between objects or particles.
Gravitational potential energy: energy stored by the attraction between two object’s due to gravity
depends upon weight and height
weight is mass x gravitational acceleration
PE = m ∙ g ∙ h
Elastic potential energy: energy stored in objects that are compressed or stretched
chemical potential energy: energy stored in chemical bonds between atoms
fuels like gasoline and wood