(SCIENCE) CIENCIAS NATURALES SEP EXAM - STUDY GUIDE

Tomorrow we start the SEP evaluation of all the 3rd. grade subjects. As I told you in class it is very important to follow the following suggestions:
1.   Read very carefully, making sure you understand, all the questions and possible answers in the exam.
2.   You may underline your answers in the booklet and then read them again before you put them in the answer sheet.
3.   Take your time! there is no rush to finish fast. 
4.   Remember this exam counts for 15% for your evaluation grade.
5.   Don't forget you need to bring a Berol-Mirado pencil No. 2. 

 

GUIA DE ESTUDIO EXAMEN SEP

CIENCIAS NATURALES

BLOQUE I  ¿Cómo mantener la salud?

Prevención de accidentes (23-27)

El sistema digestivo, circulatorio y excretor (28-37)

Evaluación y autoevaluación (40-41)

BLOQUE II ¿Cómo somos los seres vivos?

Relación entre los animales y su ambiente. Clasificación en herbívoros, carnívoros, etc., y en vivíparos, ovíparos, etc. (cómo nacen) (45-55)

Satisfacción de necesidades básicas (56-59)

Importancia del cuidado del medio ambiente (60-67)

Evaluación y autoevaluación (70-71)

BLOQUE III  ¿Cómo son los materiales y sus interacciones?

Propiedades de los materiales. Masa y Volumen. Cambios físicos y cambios químicos. Instrumentos de medición (balanza, termómetro, regla). (74-93)

Fuerza, movimiento, fricción.

Evaluación y autoevaluación (100-101)

BLOQUE IV  ¿Qué efectos produce la interacción de las cosas?

Características de la luz y su importancia (105-113)

Interacción de imanes y su aprovechamiento (120-127)

Evaluación y autoevaluación (128-129)

BLOQUE V  ¿Cómo conocemos

Las fases de la luna. Movimientos de rotación y traslación  (132-137)

Evaluación y autoevaluación (143-144)

Try to do all the evaluations at the end of each Bloque. You can find additional information in the link:

 http://www.tareasya.com.mx/index.php/tareas-ya/primaria/tercer-grado/ciencias-naturales.html

Good luck!

USEFUL SCIENCE INFORMATION-

As we are having our final exam really soon, here  are some tips to study:
I. Vocabulary words. You need to know the meanings of the following words that you  have already copied in your notebooks:
a. matter
b. element
c. periodic table
d. mass
e. density
f. volume
g. atom
h. property
i. buoyancy
j. pressure
k. mixture
l. solution
m. physical property and physical change
n. states of matter
o. chemical property and chemical change

2. Some other words that you need to know:
a. position: the location of an object. Example: Look at the helicopter's position.

b. motion: when an object keeps changing position. Example: Look at the picture. The man is in motion, it keeps changing position.

c. relative position: the position of one object compared with the position of another object. Look at the picture. What is the position of the Moon compared with the position of the Earth?

d. speed: how fast an object changes its position. Look at the picture. How fast do these cars move? There are two types of speed: constant, when it doesn't change and variable, when the speed changes, they can move faster or slower.

 We measure speed using a speedometer: It tells us the number of kilometers a car runs in one hour.

e. potential energy. It is stored energy that can be used to do work. for example, a battery, when you place it in a toy, it can make the toy move. Look at the picture. The ball at the top of the slope doesn't move, but if it is pushed by a force, it can start moving, rolling down the slope.

When the machine is holding the ball, it has potential energy. When it lets the ball fall, it becomes kinetic energy, as it is falling down.

f. kinetic energy. It is the energy of motion. Look at the picture. As you fall down the roller coaster, kinetic energy is responsible for movement.

You may want to try the roller coaster game which lets you try different combinations to create your own roller coaster. Read the instructions carefully so you can play.

http://rollercoastergamesonline.com/roller-coaster-games/digital-labs-coaster-creator

You need to have Java for this one:
http://www.funderstanding.com/educators/coaster/


The following page contains interesting facts about motion, force and velocity:
http://idahoptv.org/dialogue4kids/season12/force_and_motion/facts.cfm

This page also has games and activities. Try the ones about "sound".

g. friction. It is a contact force that opposes the motion of an object. Friction make objects slow down.

h. vibration. a very quick back-and-forth movement. Vibrations may produce sound. Wind instruments make sounds when air inside them vibrates.

i. compression wave. They are sound waves and look like this:

j. simple machines. Machines help make work easier.  For example:
An inclined plane connects a lower level to a higher level:

A lever is used to lift and move things.

A wedge split helps cut, or connect things.

A pulley changes the direction of how something moves, for example, sailors use them to raise the sail.

II. Check the phases of the moon. What are the waxing phases? what are the waning phases?
Don't forget the names of the planets! 

Good luck!

GLOBAL WARMING - ENVIRONMENT DAY'S ACTIVITIES

Today we celebrate the Environment Day. This reminds us how important our planet is, it is not only our home, but the home of millions of living beings. We are responsible for understanding how our actions contribute to damaging our environment and take the necessary actions to avoid them.

Education is very important, we need to learn about environmental issues. To celebrate this important date we are doing a special activity, follow the steps very carefully.

1. Watch the video.

 

2. Read the article and answer questions on your worksheet.

The Greenhouse Effect

The greenhouse effect is not a new phenomenon.It is a natural process that helps to heat the earth's surface to the temperatures necessary to support life.

Naturally occurring gases such as carbon dioxide, methane, nitrous oxide and halocarbons and also water vapour in our atmosphere act like a blanket around the Earth. They allow the sun's rays to warm the Earth's surface, and also prevent much of the heat escaping, so that the Earth’s temperature is maintained at reasonable levels.

The gases which trap the heat from the sun are called greenhouse gases.

Certain human activities add to the levels of most of these naturally occurring gases: 

•  When solid waste, fossil fuels (oil, natural gas, and coal), and wood and wood products are burned.

• Rice production, the decomposition of organic wastes in municipal solid waste landfills, and the raising of livestock. Methane also is emitted during the production and transport of coal, natural gas, and oil.
• Agricultural and industrial activities, as well as during combustion of solid waste and fossil fuels.

 Our protective blanket is now trapping too much heat and steadily increasing

the Earth’s average or mean temperature. Even a very small rise in the Earth’s mean temperature will have quite dramatic negative impacts on ourenvironment. These impacts are predicted to include melting of polar ice caps, rising sea levels, increasing

intensity and frequency of storms, and changes to weather patterns, including prolonged droughts, that will reduce agricultural productivity as well as our

recreational and tourism activities.

Scientists believe that if the Earth’s mean temperature increases more than 2°C, irreversible damage could occur to ecosystems throughout Australia including possible destruction of Ningaloo Reef and the Great Barrier Reef. Without the protection of the greenhouse effect the Earth’s average temperature would be a rather chilly -18° Celsius and we would find it rather difficult to survive.

The Earth is warming at a faster rate than any time in the last 10,000 years – the 1990s was the warmest decade in the last millennium.  

3. Play some games at:

http://climatekids.nasa.gov/menu/play/