HHH Plants Grade 3

What are the basic parts of almost all plants?

• A leaves and vegetables

• B roots, stems, and leaves

• C water, air, and light

• D stems, leaves, seeds, cones, roots, flowers, and bark

According to the diagram, where does pollen go when it leaves a stamen?

• A to a pistil on the same flower or another flower

• B to a stamen on the same flower or another flower

• C only to a pistil on the same flower

• D only to a pistil on anotherflower

Which process is shown in this diagram?

• A transpiration

• B fertilization

• C pollination

• D photosynthesis

You have learned that the world is full of many kinds of plants and that plants are important to people and other animals. How can you help make sure that the world will always have many kinds of healthy plants?

• planting new trees

• avoid breaking off branches

• helping to clean up or preserve an area so plants can grow there

• writing letters to officials encouraging them to protect endangered plant species

Read this sentence:

Plants use water, carbon dioxide, and light during photosynthesis.

What does the word photosynthesismean in this sentence?

• the process plants use to get what they need from the soil

• the process plants use to spread their seeds

• the process plants use to make more of themselves

• the process plants use to make food

What would most likely happen if you didn’t let one of the leaves on a plant get air or light?

• The plant could not grow any fruit.

• The leaf would die

• There would be no changes to the leaf or the plant.

• The plant would die.

How do most plants reproduce?

• They take in carbon dioxideand give off oxygen.

• Their flowers fall off and begin growing into a new plant.

• They lay eggs that grow into new plants.

• They produce seeds that grow into new plants

When the pollen from a stamen on one flower sticks to the pistil on another flower, it may begin to grow....

• another flower

• roots

• a seed

• a leaf

How might a seed travel to a new place where it can grow?

• A breeze might carry it down a mountain.

• It might fall into an ocean and grow on an island.

• It might stick to a dog and wind up in someone’s backyard.

• Any of the above could happen.

When we say that plants reproduce, it means that they .

• grow bigger and bigger

• make more of the same kind of plant

• make their own food

• make a new kind of plant