Chromosome video

Chromosome video

lab activity 3

Lab 3

lab activity

Lab Manual 1

This would let you know how to do a lab report. All classes

Lab Report

Mitosis

First Period Achievements

Lab for seveth grade

Science lab for April 15th 2009

TITULO :Ley de Conservación de la Masa Durante un Cambio Químico

OBJETIVO :Comprobar la ley de la conservación de la masa.

MATERIALES:
•Balanzas
•3 Frascos con Tapas.
•1 Pipeta Graduada.

REACTIVOS
•Solución de Cloruro de Calcio (CaCl2) al 10 %
•Solución de Carbonato de Sodio ( Na2CO3) al 10 %
•Solución de Ácido Sulfúrico (H2SO4) al 10 %

FUNDAMENTO TEORICO:La teoría de la conservación de la materia fue enunciada por el químico francés Antonio Lavoisier, haciendo uso de una balanza y estableciendo que al efectuarse una reacción química, la masa total del sistema reaccionante no cambia.
Para poder comprobar dicha ley se necesita conocer la masa inicial de las sustancias que entran en la reacción y luego al finalizar esta se debe pesar nuevamente la masa de los productos.
Cuando Lavoisier experimento y comprobó lo anterior quedo sin validez la teoría de Flogisto.

PROCEDIMENTO EXPERIMENTAL
1. Pesar cada uno de los frascos completamente vacío, limpio y seco. Anotando el peso de
cada uno de ellos.
2. Depositar en uno de los frascos 10 ml. de una solución de ácido sulfúrico (H2SO4).
3. En cada uno de los frascos restantes coloque 5 ml de las soluciones de Carbonato de
Sodio en uno y Cloruro de Calcio en el otro, tápelo y péselo nuevamente.
4. Vierta con cuidado la solución que es Cloruro de Calcio en el frasco que contiene la
solución de Carbonato de Sodio. Agite lentamente, observe y anote lo sucedido.
5. Tape el frasco con el contenido anterior y péselo en una balanza. Anotando dicho peso.
6. Retire el frasco de al balanza y adicione la solución de ácido sulfúrico y agite suavemente observando y anotando los cambios, siga agitando lentamente hasta cuando la reacción haya finalizado. Si el frasco se calienta espere que se enfríe a temperatura ambiente y luego péselo para determinar el peso total de la mezcla.

CALCULOS:
Los cálculos y resultados se harán en base a los datos siguientes:
a) Peso total antes de la primera mezcla.
b) Peso total después de la primera mezcla.
c) Peso total después de la segunda mezcla.

PREGUNTAS
1. Que puede usted responder acerca del cambio de masa que sucede en una reacción
química. ?
2. Se cumplió o no, la ley de la conservación de la materia.
3. En que consistió la teoría del Flogisto.

You only have to bring the flasks (jars with lids) not too big.

ACHIEVEMENTS FOURTH BIMESTER 7

SEVENTH GRADE ACHIEVEMENTS
7. Determina ecosistemas y analiza el equilibrio dinámico entre las comunidades.
INDICATORS
• Relate and explain the water cycle, the carbon cycle, and the nitrogen cycle.
• Synthesise the different type of interactions and explain how the environment affects them.
• Describes how habitat destruction affects Biodiversity.
• Explains how biodiversity can be maintained.

ACHIEVEMENTS THIRD BIMESTER 7

AREA: CIENCIAS NATURALES Y EDUCACION AMBIENTAL
ASIGNATURA: SCIENCE GRADO: SEPTIMO INTENSIDAD HORARIA SEMANAL: 4 HORAS
PROFESOR(A): ISABEL SHAW GONZALEZ BIMESTRE: III

LOGRO: 5. Describe las características, funciones, y estructuras del sistema Óseo de los humanos y otros tipos de animales y explica como este sistema se ha adaptado.

TEMAS: SKELETAL SYSTEM

INDECADORES DE LOGRO: 1. Identify the major organs of the skeletal system.

2. Relate and differentiate the skeletal system of vertebrates and invertebrates.

3. Compare the types of joints.

SUBTEMA: THE SKELETAL SYSTEM

LOGRO: 6. Describe las características, funciones, y estructuras del sistema Muscular de los humanos y otros tipos de animales y explica como este sistema se ha adaptado.

TEMA: MUSCULAR SYSTEM.

INDICADORES DE LOGRO: Describe the functions, and structures of muscles

SUBTEMA: THE MUSCULAR SYSTEM

Muscle and skeletal system

check the following link for the information on muscle and skeletal of different animals and tell me what you think. You only have to click in the word link in blue.

Directed Reading

Section: The Urinary System

_____ 1. What is excretion?

• a. the process of digesting food
  b. the process of breathing
  c. the process of removing waste from the body
  d. the process of adding nutrients to the body

2. What is the urinary system?

__________________________________________________________

cleaning the blood

3. What are two examples of wastes that the urinary system removes from the blood?

__________________________________________________________
the kidneys as filters

_____ 4. How many kidneys does a person normally have?
a. one
b. two
c. three
d. four

_____ 5. Which of the following is the job of the nephrons?
a. They remove wastes from the blood.
b. They produce urea.
c. They produce urine.
d. They clean the kidneys.
6. What do the kidneys do?

__________________________________________________________

7. What is urea?

__________________________________________________________

Water in, water out

_____ 8. Why do humans sweat?
a. to cleanse the skin
b. to cool the body
c. to produce saliva
d. to control thirst
9. Why does your body need to excrete as much water as it brings in?

__________________________________________________________

__________________________________________________________
10. What does ADH do?

__________________________________________________________

__________________________________________________________

11. What effect does a diuretic have on your body?

__________________________________________________________

__________________________________________________________

urinary system problems

_____ 12. Kidney stones are made of which of the following substances?
a. viruses
b. waste materials
c. ADH
d. bacteria

13. How can bacteria get into the bladder and ureters?

__________________________________________________________

14. What can happen if the nephrons are damaged?

__________________________________________________________

__________________________________________________________

Urinary system summary seventh grade

Section summary
Read the following section summary.
• The urinary system removes liquid waste as urine. The filtering structures in the kidney are called nephrons.
• Most of the water in the blood is returned to the bloodstream. Urine passes through the ureter, into the bladder, and out of the body through the urethra.
• Disorders of the urinary system include infections, kidney stones, andkidney disease.

The Urinary System seventh grade

Skill Worksheet
Reinforcement
Annie Apple’s Amazing Adventure
Complete this worksheet after you finish reading the section “The Urinary System.”

Being an apple, Annie is not very good with words. In her story below, she used many terms incorrectly. The incorrect terms have been underlined and numbered. Help Annie by writing the correct term in the corresponding blank provided at the bottom of the page.

Hi, my name is Annie Apple, and I’m, well, an apple! I’ve just been on the strangest adventure, and I thought you’d like to hear about it.
First, this girl took a huge bite out of me and used her teeth to chew me. They call that (1) chemical digestion. While this was happening I got soaked by (2) bile, which breaks down my carbohydrates into simple sugars. Boy, was that -uncomfortable! Then I was swallowed. I went down a long tube called the (3) small intestine, and I ended up in the (4) liver. There, I was bombarded by acid and enzymes, which broke me down further until I was a soupy mixture called (5) amino acids. Next I was released into the (6) large intestine. There I was met by pancreatic juice and (7) saliva. Then I was broken down enough to be partially absorbed into the bloodstream.
After that, I passed into the (8) esophagus, where I had water absorbed from me. At last, what was left of me passed through an opening called the (9) villi. But that’s not the end! The part of me that passed into the bloodstream provided energy to lots of cells before it ended up at the (10) stomach, where it was filtered through tiny (11) bladders and then went out the (12) urethra to be stored in the (13) nephron.
The final leg of my journey was through the (14) ureter to the outside world. Isn’t that an unbelievable adventure?
1.____________________________ 8.__________________________
2.____________________________ 9.__________________________
3.____________________________ 10.__________________________
4.____________________________ 11.__________________________
5. ___________________________ 12.__________________________
6.____________________________ 13.__________________________
7.____________________________ 14.__________________________

vocabulary activity for seventh grade

Activity
Vocabulary Activity
Alien Anagrams
After you finish reading the chapter, try this puzzle!
A spaceship full of alien ambassadors has just landed in your backyard. They are very interested in earthling science, especially the study of biological systems. Help them translate their scrambled list of terms. DOOG CLUK!
1. long, straight tube connecting your throat and stomach
2. microscopic filters located in the kidneys
3. large, reddish-brown organ that makes bile, breaks down nutrients, and stores toxins
4. saclike organ that breaks down food into liquid
5. oval organ that sends fluid into the small intestine to chemically digest and neutralize chyme
6. bean-shaped organs that filter blood
7. small, saclike organ that stores bile
8. tube where most chemical digestion occurs
9. tube where liquid waste is changed into solid waste
10. group of organs that work together to digest food
11. group of organs that remove waste from the blood
GAPHOUSES ___________________
HORNPENS ____________________
VIRLE _________________________
SCAMTHO _____________________
SNARPACE ____________________
YIDNEKS ______________________
BALDGLARDLE ________________
LALMS SEENITINT _____________
GELAR NESTIENT ______________
GESTIDIVE SMETYS ____________
YANRIRU TYSMES _____________