Monday, September 22, 2014
Thursday, May 8, 2014
Pollination
Pollen grains are tiny and usually yellow. They form on the tips of the stamens.
Pollination is the movement of pollen from the stamens to the ovary. This movement usually takes place in the same plant.
Pollination also takes place between plants of the same type.
Insect Pollination
Insects transport pollen between plants. Insects are attracted by large aromatic flowers with nectar.
Wind Pollination
The wind blows pollen from small, less attractive flowers.
Pollination is the movement of pollen from the stamens to the ovary. This movement usually takes place in the same plant.
Pollination also takes place between plants of the same type.
Insect Pollination
Insects transport pollen between plants. Insects are attracted by large aromatic flowers with nectar.
Wind Pollination
The wind blows pollen from small, less attractive flowers.
Friday, April 11, 2014
Plants
Plants are living things. They feed, breathe, grow, and make new plants, but they are different from animals.
Plants don't move from place to place like animals do. Plants keep growing, but animals don't grow when they are older.
Scientists think that there are more than 300,000 types of plants in the world!
Scientists put plants into different groups to classify them. They think about how plants grow and how they make new plants.
Seed Plants
New plants grow from the seeds. Many of these plants produce flowers (for example, daisies) and many others produce cones (conifers).
Non-seed Plants
Ferns and mosses are non-seed plants. They don't make seeds, but they make tiny spores. New plants grow from these spores.
Parts of a Plant
Click on the image below and label the plant.
The Life of a Plant
Plants change at different times of their life. They grow and make new plants. When they get old, they die. This is called a life cycle.
Click on the image below to do these activities:
How Plants Feed
Plants make food for themselves by a process called photosyntesis. This word is made of two parts: 'photo', which means light, and 'synthesis', which means building or putting together.
Plants use sunlight to make food from carbon dioxide (CO2) and water (H2O). Plants get carbon dioxide from the air, and water from the soil. During photosynthesis, plants also produce oxygen (O2).
Plants capture the energy in sunlight and store it in the sugars and starch that they make.
Now watch and sing the 'Photosynthesis' song!
The green parts of a plant are where photosynthesis takes place. A plant's roots, flowers, fruits and seeds cannot make food. They have different functions. Only the green parts have the chemical called chlorophyll. This is a green pigment found mostly in leaves.
Plants don't move from place to place like animals do. Plants keep growing, but animals don't grow when they are older.
Scientists think that there are more than 300,000 types of plants in the world!
Scientists put plants into different groups to classify them. They think about how plants grow and how they make new plants.
Seed Plants
New plants grow from the seeds. Many of these plants produce flowers (for example, daisies) and many others produce cones (conifers).
Non-seed Plants
Ferns and mosses are non-seed plants. They don't make seeds, but they make tiny spores. New plants grow from these spores.
Parts of a Plant
Click on the image below and label the plant.
The Life of a Plant
Plants change at different times of their life. They grow and make new plants. When they get old, they die. This is called a life cycle.
Click on the image below to do these activities:
How Plants Feed
Plants make food for themselves by a process called photosyntesis. This word is made of two parts: 'photo', which means light, and 'synthesis', which means building or putting together.
Plants use sunlight to make food from carbon dioxide (CO2) and water (H2O). Plants get carbon dioxide from the air, and water from the soil. During photosynthesis, plants also produce oxygen (O2).
Plants capture the energy in sunlight and store it in the sugars and starch that they make.
Now watch and sing the 'Photosynthesis' song!
The green parts of a plant are where photosynthesis takes place. A plant's roots, flowers, fruits and seeds cannot make food. They have different functions. Only the green parts have the chemical called chlorophyll. This is a green pigment found mostly in leaves.
Saturday, March 29, 2014
Principal Characteristics of Living Things
We can recognize living things because they share the following characteristics:
- They are born. All living things come from other living thing.
- They eat. All living things need food. The type of food may vary.
- They grow. All living things increase in size during their lifetime. Sometimes they change in appearance.
- They react. Living things can perceive what is going on around them, and they react to what they perceive.
- They reproduce. Living things can create offspring similar to themselves.
- They die. At some time, all living things stop functioning and cease to live.
Friday, March 21, 2014
Living and Non-Living Things
Does it breathe air?
Does it move or grow?
Does it need food or water?
If "yes", then you know... It's a living thing. (x2)
Does it breathe air?
Does it move or grow?
Does it need food or water?
If "no", then you know... It's a nonliving thing. (x2)
Revision Exercises:
Tuesday, March 4, 2014
Friday, October 18, 2013
Reptiles
Watch the video and answer:
1) What are the distinctive features of
reptiles?
2) What is the function of the reptile’s
scaly skin?
3) What’s the difference with
amphibians’ skin?
4) Snakes use their scales to help grip
the ………………………………….
5) In turtles and tortoises, some scales
have evolved into armour ……………………………….
6) Why do crocodiles have long tails?
7) What does the term “cold-blooded”
means?
Monday, August 19, 2013
INVERTEBRATE ANIMALS
PRINCIPAL CHARACTERISTICS
Invertebrate animals are alike in one way: they have no inner skeleton or backbone. Invertebrates differ, however, in size, shape and body covering.
SIZE: Most invertebrates are very small, only a few centimetres, but some are enormous, like the giant squid.
Look! This is a picture of a giant squid found near Japan:
Read this facts about the giant squid:
BODY SHAPE: Most invertebrates are symmetrical.
Bilateral symmetry: Two identical halves or planes. For example: insects.
In this picture, you can see a ladybug.
SPONGES
They have irregular bodies and no symmetry. They cannot move around. They attach themselves to rocks or the ocean floor. They filter sea water and retain the nutritive substances for food.
CNIDARIANS
They have jelly-like bodies, some with radial symmetry. They have tentacles that sting you. They are marine animals. Some, like coral and sea anemone, attach themselves to rocks. Others, such as medusas, can move about.
WORMS
They have soft bodies with bilateral symmetry. Some are cilindrical, but others are flat. Some worms are aquatic; others are terrestrial. Many are parasites.
ECHINODERMS
They have five-way symmetry. They have a skeleton made of hard plates, often with spines. They are covered by a thin skin. All are marine animals.
ARTHROPODS
They have bilateral symmetry. Their bodies are totally coveredby an articulated exoskeleton, like armour. Some are aquatic; otheres are terrestrial.
MOLLUSKS
They have a soft body with bilateral symmetry. Many are covered with one or two shells.
Invertebrate animals are alike in one way: they have no inner skeleton or backbone. Invertebrates differ, however, in size, shape and body covering.
SIZE: Most invertebrates are very small, only a few centimetres, but some are enormous, like the giant squid.
Look! This is a picture of a giant squid found near Japan:
Click on the image to find out more!
Read this facts about the giant squid:
BODY SHAPE: Most invertebrates are symmetrical.
Bilateral symmetry: Two identical halves or planes. For example: insects.
In this picture, you can see a ladybug.
Radial symmetry: Several planes of symmetry. For example: starfish.
Asymmetry: The body has no symmetry. It is irregular. For example: sponges.
Look at the following diagram which shows the different kinds of symmetry:
(A) Bilateria (bilateral symmetry). (B) Radiolarians (radial symmetry).
From Biology Demystified: A Self-Teaching Guide. Copyright © 2003 by The McGraw-Hill Companies, Inc. All Rights Reserved.
BODY COVERING: Some invertebrate bodies are protected by shells orexoskeletons (like scorpions or snails), but others have no covering.
WHERE AND HOW INVERTEBRATES LIVE
Invertebrates differ in their habitat and their movement.
INVERTEBRATE GROUPS
There are many groups of invertebrates. For example:
WHERE AND HOW INVERTEBRATES LIVE
Invertebrates differ in their habitat and their movement.
- Many invertebrates live in the ocean, but some live in fresh water, and others on land.
- Most invertebrates can move. However, some do not move: they attach themselves to rocks or the ocean floor. Parasites live inside other animals and harm them.
INVERTEBRATE GROUPS
There are many groups of invertebrates. For example:
They have irregular bodies and no symmetry. They cannot move around. They attach themselves to rocks or the ocean floor. They filter sea water and retain the nutritive substances for food.
CNIDARIANS
They have jelly-like bodies, some with radial symmetry. They have tentacles that sting you. They are marine animals. Some, like coral and sea anemone, attach themselves to rocks. Others, such as medusas, can move about.
WORMS
They have soft bodies with bilateral symmetry. Some are cilindrical, but others are flat. Some worms are aquatic; others are terrestrial. Many are parasites.
ECHINODERMS
They have five-way symmetry. They have a skeleton made of hard plates, often with spines. They are covered by a thin skin. All are marine animals.
ARTHROPODS
They have bilateral symmetry. Their bodies are totally coveredby an articulated exoskeleton, like armour. Some are aquatic; otheres are terrestrial.
MOLLUSKS
They have a soft body with bilateral symmetry. Many are covered with one or two shells.
Let's watch a movie for reviewing all the information!
Tuesday, May 14, 2013
Sunday, May 5, 2013
HOW LIVING THINGS ARE ORGANIZED
Multicellular living things are very organized. In fact, levels of organization exist:
The smallest living unit that makes up a living thing is the CELL.
Look at these human cells:
CELLS group together to form tissues.
TISSUES are made up of similar cells that carry out a common function. For example, muscle tissue is made up of hundreds of muscle cells grouped together.
Tissues form ORGANS. Organs are made up of a group of tissues that work together to carry out a common function. For example, muscles and bones are organs.
Organs form SYSTEMS. Systems are made up of a group of organs that work together to carry out a common function. For example, the skeletal system is made up of bones.
When all systems work together, they form an ORGANISM. An organism is a COMPLETE LIVING THING.
The smallest living unit that makes up a living thing is the CELL.
Look at these human cells:
CELLS group together to form tissues.
When all systems work together, they form an ORGANISM. An organism is a COMPLETE LIVING THING.
Wednesday, April 24, 2013
The Internal Organization of Living Things
What is a cell?
Living things are made up of a large number of very small units called CELLS.
A cell is the smallest living unit that makes up a living thing.
Most cells are very small, so we need a microscope to see them.
The number of cells in a living thing varies.
What are cells like?
Cells are living things. This means that, like other living things, they carry out the life processes of nutrition, reproduction and sensitivity.
However, not all cells are alike. They differ in shape, in size and in the tasks they carry out. For example, skin cells are differente from bone cells.
Cells have three main parts:
Plant cells also have a hard cell wall around the membrane.
Animal Cell Plant Cell
Click on the image above to learn more about each cell part.
Now, click the following image. Read the tutorial, play the game and answer the quiz questions.
Living things are made up of a large number of very small units called CELLS.
A cell is the smallest living unit that makes up a living thing.
Most cells are very small, so we need a microscope to see them.
The number of cells in a living thing varies.
- Some living things are made up of a single cell. They are called UNICELLULAR: they can only be seen with a microscope. For example: a paramecium.
- Other living things are made up of many cells: they are called MULTICELLULAR. For example: an elephant.
What are cells like?
Cells are living things. This means that, like other living things, they carry out the life processes of nutrition, reproduction and sensitivity.
However, not all cells are alike. They differ in shape, in size and in the tasks they carry out. For example, skin cells are differente from bone cells.
Cells have three main parts:
- The membrane is a covering that surrounds the cell, and separates it from the exterior.
- The nucleus is the part that controls the function of the cell.
- The cytoplasm is the space between the nucleus and the membrane.
Plant cells also have a hard cell wall around the membrane.
Animal Cell Plant Cell
Now, click the following image. Read the tutorial, play the game and answer the quiz questions.
Sunday, April 14, 2013
WHAT LIVING THINGS ARE LIKE
PRINCIPAL CHARACTERISTICS
We can recognize living things because they share the following characteristics:
We can recognize living things because they share the following characteristics:
- They are born. All living things come from other living things.
Chicks are hatching from eggs.
- They eat. All living things need food. The type of food may vary.
The squirrel is eating a nut.
- They grow. All living things increase in size during their lifetime. Sometimes they change appearance.
Plants growing.
Click on the image below to play a game about "Growth".
- They react. Living things can perceive what is going on around them, and they react to what they perceive.
A zebra running away from a hungry lion.
- They reproduce. Living things can create offspring similar to themselves.
A mother, a father and their baby.
- They die. At some time, all living things stop functioning and cease to live.
Dead trees in a desert.
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