Flowers_Grade8

Flowers

Grade 8

2021.09.28

​Why are flowers so colorful?

​Flowers are brightly colored to attract insects and birds. They do this because the insects and birds help plants to reproduce. Flowers are the reproductive organs of plants.

​The parts of a flower

​Flowers come in all sorts of different shapes and sizes. But you can usually find the same parts in most flowers.

​The petals are usually the most colorful part of the flower. They attract insects or birds to the flower. Some flowers produce scents (smells), which also help to attract insects.

​Not all flowers produce smells that we like. This flower is a stapelia. It has a scent like rotting meat, and attracts flies.

​The insects or birds feed on sweet, sugary nectar produced at the base of the petals. They may also eat some of the pollen, produced in the anthers. The pollen contains the male gametes of the flower.

​

The female gametes are inside the ovules, which are inside the ovaries.

Unlike animals, many plants produce both male gametes and female gametes.

​Name the part of the flower

A - Stigma

​B - Style

​C - Petal

​D - Ovule

​E - Sepal

​F - Ovary

Question 1

Many people use the word ‘flower’ when they really mean ‘plant’. Explain the difference between a plant and a flower.​

Question 2

Insects can often smell flowers from hundreds of metres away. Suggest how the scent from the flowers spreads out into the air around them.

Answer 1

A plant is a complete organism; it has roots, stems, leaves and sometimes flowers. A flower is an organ, a part of a plant. Flowers are organs that carry out sexual reproduction.

Answer 2

The scent of a flower is made up of molecules of chemicals that disperse through the air. The molecules may be carried by air currents. They can also diffuse through the air, as the molecules move randomly about and spread in all directions.

Multiple Choice

Which part of the flower helps to attract insects for pollination?

• Stamen

• Pistil

• Petal/Petals

• Sepal

Multiple Choice

The male part of the flower is called the stamen.

• True

• False

Multiple Choice

Name the parts of a flower.

What is number 1 called?

• Stamen

• Pistil

• Petal

• Sepal

Multiple Choice

Name the parts of a flower.

What is number 4 called?

• Petal

• Stamen

• Sepal

• Pistil

Multiple Choice

What part covers and protects the flower bud?

• petal

• sepal

• stamen

Multiple Choice

What is the male part of the flower?

• egg

• pollen

Multiple Choice

The process of getting the pollen to the egg cell is called...

• pollination

• pollen

• stamenation

Multiple Choice

Who is made up of the stigma, style, and ovary?

• Carpel
• Stamen
• Receptacle
• Sepal

Multiple Choice

This part of the flower contains the ovule?

• Petal
• Nectary
• Ovary
• Carpel

Multiple Choice

What part of the flower makes food for insects and other animals to feed on?

• Nectary
• Stigma
• Anther
• Ovary

Homework​

Workbook Exercise 1.4 Comparing two flowers​