Unit 1.3 - Seed dispersal - Grade 5 - Week 6

1.3 - How seeds are spread

https://wordwall.net/resource/60257988/parts-of-a-flower

​Science Recap

Science Vocbulary (homework)

Explode

Seed dispersal

Seedlings

Spongy

Fruits and seeds

Have you ever swallowed a seed when you were eating an apple or an orange? A fruit is part of a flowering plant that contains the seeds. Fruits and seeds can be different sizes and shapes. Fruits usually have a skin on the outside, seeds inside and flesh around the seeds.

A fruit has two jobs:
- To protect the seeds inside
- To help spread the seeds.

Multiple Select

A fruit has two jobs

• To protect the seeds

• To help spread the seeds

• To smell nice

• To look beautiful

Non-edible fruits are parts of plants that might look like fruits we can eat, but they're not safe or tasty for us.

Non-edible fruits

Edible fruits are the tasty parts of plants that we can eat. They come in many shapes, colors, and flavors, like apples, bananas, and strawberries.

Edible fruits

Fruits - Can we eat them all?

is the skin smooth or rough?

​what colour is the flesh inside?
is the flesh firm or soft?
is the flesh dry or juicy?
what colour are the seeds?
How many seeds can you count?
Are the seeds big or small?

Activity: Observe and draw a fruit.

Categorize

Options (5)

Organize these options into the right categories. Edible fruits and non-edible fruits.

Edible fruits

Non-edible fruits

Why seeds must be spread.

Plants need to spread their seeds away from themselves. We call this seed dispersal. Seed dispersal happens when a fruit is ripe. The seeds are ready to grow into a new plant.

Seeds grow into young plants called seedlings. Seedlings need room to grow. They also need light and water. Seedlings cannot grow to be healthy plants if they all have to share water and light in a small area. Plants are adapted to disperse their seeds in different ways.

Labelling

Identify how you think the following seeds are being dispersed.

Drag labels to their correct position on the image

By water

By the wind

By animals

Seed dispersal (pg 17 - 19)

• Animals

• Wind

• Water

• Explosion

• Drop and roll

Seeds can be dispersed in many different ways

Colourful, juicy and tasty fruits are often dispersed by animals.

Some fruits have spines and hooks which attach to the fur of an animal.

​

Animals

Multiple Choice

Which of the following seed do you think will be dispersed on animals fur?

Dandelions have parachute hairs which helps them float in the air.

Some have papery wings to help them be blown easily.

​

Wind

These fruits must have a spongy covering to help them float in water.

The coconut is dispersed by water. Mangrove seeds, also called 'sea pencils', float until they reach the land.

​

Water

Some fruits disperse their seeds by themselves. The fruit dries out and splits open to let the seeds fall out.

Some fruits explode and shoot their seeds out.

​

Split open or explosion

Some fruits are heavy and round. When they are ripe they fall to the ground and roll away from the parent plant.

Sometimes these fruits are eaten by animals to.

​

Drop and roll

Multiple Select

Identify how the seed is dispersed and how it is adapted to the type of dispersal.

Coconut seed

• Dispersed by water

• Dispersed by wind

• Adaptation: Have parachute like hairs to help it float in the air.

• Adaptation: The seed as a spongy covering which helps it to float.

Multiple Select

Identify how the seed is dispersed and how it is adapted to the type of dispersal.

Dandelion

• Dispersed by water

• Dispersed by wind

• Adaptation: Have parachute like hairs to help it float in the air.

• Adaptation: The seed as a spongy covering which helps it to float.

Multiple Select

Identify how the seed is dispersed and how it is adapted to the type of dispersal.

Peach

• Dispersed by drop and roll

• Dispersed by animals

• Adaptation: They have a tough outer layering to help it roll further way

• Adaptation: They are small and easy to swallow.

Multiple Select

Identify how the seed is dispersed and how it is adapted to the type of dispersal.

Baneberry

• Dispersed by drop and roll

• Dispersed by animals

• Adaptation: The fruit is colourful to attract birds

• Adaptation: They have parachute like hairs to help it float in the air.

Multiple Select

Identify how the seed is dispersed and how it is adapted to the type of dispersal.

Bean pod

• Dispersed by drop and roll

• Dispersed by explosion

• Adaptation: Seed pod dries out and the seeds pop out.

• Adaptation: They have parachute like hairs to help it float in the air.