Science 3 - Unit 1

What kind of tree grows cones to make seeds?

• Spring

• Summer

• Deciduous

• Coniferous

Choose the word that belongs in the sentence. Tubes that carry water and minerals from the roots to other parts of the plants are in the _________.

• leaf

• stem

• thorn

• flower

What structures help keep a cactus from losing too much water?

• tubers

• thorns

• woody stems

• stems with a thick, waxy covering

Which seed part stores food for the seed?

• the fruit

• the flower

• the seed leaf

• the seed coat

In the forest, Jan picked burs off her pants and dropped them. What did she do by dropping burs?

• She pollinated a plant

• She did nothing important

• She left food for the forest animals

• She helped to scatter a plant's seeds.

Look at the illustration. What is the bee doing to the flower?

• pollinating it

• eating its fruit

• germinating it

• scattering its seeds

Many plants that lived long ago are extinct. How do scientists know about these plants?

• They grow plant fossils.

• They found plant fossils.

• They grow plants like them in space.

• They found living plants that are like them.

Look at the object shown in the illustration. How was this object formed?

• A plant grew in rock.

• A plant was pressed into a rock.

• A plant grew in wood. The wood became rock.

• A plant was pressed into mud. The mud became rock.

Scientists have learned many interesting things about plants that lived long ago. What is one difference between early plants and those of today?

• Early plants had more fruit.

• Early plants had more seeds.

• Early plants did not have leaves.

• Early plants did not have flowers.

When a seed starts to grow into a new plant, what is it doing?

• pollinating

• germinating

• growing leaves

• creating seedlings