PLANTS

Plants are living things, so they carry out the three life processes:

• nutrition
• interaction
• reproduction

We can classify plants intro three groups:

• grasses
• bushes
• trees

We can see three different parts on a plant:

Flowers are the reproductive organs of a plant. They contain:

• stamens: they produce pollen.
• carpel: the seeds develope into the carpel. The carpel grows into a fruit.
• petals: they protect the stamens and carpel. They are coloured.
• sepals: they protect the petals.

Fruits are the part of the plant that develope from the flower. The fruit contains the seeds of the plant.

It covers and protects the seeds. A fruit can have fleshy or dry tissue.

Seeds are inside the fruit. Fruits can have:

• only one seed called stone.
• several seeds that can be soft or hard.

 

Plants life cycle. Plants need water, sunligh, air and minerals from the soil to grow.

COMPLEX MACHINES

More complicated machines (sometimes called Compound or Complex Machines) have two or more simple machines working together to do the same work.

• A wheelbarrow is one example of a compound machine because it has levers (the handles) and a wheel.

Information copied from:

Complex machines can have these parts:

• motors:

• gears:

• electric circuits:

• electronic components:

STATES OF MATTER

Matter can be found in three states: solid, liquid or gas.

• solid: it has got its own shape and shape doesn´t change.
• liquid: it takes the form of its container.
• gas: it expands to fill the space.

 

 

MATERIALS

Let´s see some example of materials:

PROPERTIES OF MATERIALS

let´s see some links

And now a funny song: