Unit 5 Worksheets solutions

Hello third-graders!

I´m uploading the solutions to the worksheets on Unit 5.

How plants reproduce

Types of plants

Nutrition of a plant

The process of nutrition in plants is called photosynthesis and it is also a cycle:

1) Roots absorb water and nutrients from the soil (water + nutrients= raw sap)

2) Raw sap travels to the leaves and mix with sunlight and carbon dioxide (raw sap + CO2 + sunlight = elaborated sap)

3) Elaborated sap travels through the plant

Plants release oxygen as a result of this process.

Reproductive cycle of a plant:

The flower is the reproductive organ of a plant (except for non-flowering plants). The reproductive process of a flower is a cycle:

1) Pollen falls from the anther into the pistil

2) Ovules and pollen mix in the ovary

3) The ovary matures into a fruit with seeds inside

4) Seeds fall in the earth and develop into a new plant

Holidays experiment

Hello third-graders!

We will take advantage of the holidays to make an experiment: growing a chickpea!

You should start the activity on Thursday 6^th of April and you should bring it to class on Tuesday 18^th of April.

You will need:

• A glass bottle
• Cotton
• A chickpea

Follow the instructions below:

1)      Pour water in the cotton

2)      Introduce the cotton inside the glass bottle

3)      Put the chickpea inside but NOT surrounded completely by the cotton so you can see it from the outside

4)      Put the bottle near a window

Watch out that the cotton is always WET but not too much!!!!

I´m looking forward to see your experiment!!

Nice holidays!

Cristina

TYPES OF PLANTS

Unit 5 Worksheets

Hello third-graders!

I´m uploading some worksheets for you to work on Unit 5.

 Best regards,

Cristina

PLAY WITH THE PLANTS!

NATURAL SCIENCE UNIT 5: PLANTS

The plants

 

Unit 5: The plants

Plants are living things because they carry out processes such as nutrition (in the roots and leaves), sensitivity and reproduction (in the flower). These processes happen in different parts of the plants.

Parts of the plants

Roots are the part underground and some of them are edible (potato, carrot). Roots can:

1)      Make the plant stand

2)      Absorb water

Stems support the plant upright above the ground. Stems carry water through the plant. Stems divides up into branches. Branches support leaves, flowers and fruits. Stems can be:

1)      Herbaceous: soft and flexible.

2)      Woody: hard and rigid (trunks).

Some plants have leaves all the year long, they are evergreens; whereas other plants lose their leaves in autumn, they are deciduous.

Leaves hang from branches by the petiole and in the leaf blade plants make their own nutrients in a process called “photosynthesis”.

Nutrition in plants

The water and minerals in the ground are absorbed by the roots (this is called raw sap) and sent upwards to the leaves where sunlight and carbon dioxide are mixed resulting in elaborated sap. Elaborated sap goes then all around the plant giving nutrients to feed all the parts of the plant.

Reproduction in plants

Flowers are the reproductive organs of plants. In the flower there are different parts that allow the plant to reproduce:

The process of reproduction in plants has different steps:

1)      Stamens make pollen

2)      Pollen gets into the pistil

3)      Ovary matures and turns into fruit (with seeds inside).

4)      Seeds fall in the ground and a new plant grows there.