Lesson Worksheet: External Structures of Plants Science • 4th Grade
In this worksheet, we will practice identifying external structures of plants and describing their functions.
Plant leaves have a waxy coating called a cuticle.
Fill in the blanks: The cuticle the amount of a plant loses through its leaves.
- Areduces, food
- Bincreases, food
- Creduces, water
- Dincreases, water
Fill in the blanks: It is better for a plant to take in water through the roots rather than the leaves. The responsible for limiting the amount of water that the take in.
- Acuticle is, roots
- Bstem is, roots
- Ccuticle is, leaves
- Dpetals are, leaves
External structures of plants can be easily seen from the outside.
Are the thorns of this cactus external structures?
Which external structure on this rose plant stops animals eating it?
- AThe leaves
- BThe flower
- CThe prickles
Three people are talking about the functions of external structures in plants. Who is correct?
- AOnly Madison
- BOnly Scarlett
- COnly Madison and Scarlett
- DOnly Natalie
- EAll of them
There are two types of stems that plants can have. These are soft stems and woody stems.
Fill in the blanks: This tree has a stem. This stem can also be called a trunk. It is hard and covered in .
- Awoody, bark
- Bsoft, prickles
- Csoft, bark
- Dwoody, prickles
Fill in the blanks: These plants have stems. These stems are green and .
- Awoody, flexible
- Bwoody, hard
- Csoft, hard
- Dsoft, flexible
Many plants have flowers. These flowers have external structures that help the plant reproduce.
Fill in the blank: The label shows the , which is the male part of the flower that makes pollen.
What is the function of the sepal?
- AIt produces pollen.
- BIt protects the flower as it develops.
- CIt receives pollen.
Look at the given diagram.
What is the missing label?
Fill in the blank: This is the part of the flower. It receives the pollen from the stamen.
Plants with flowers often have very colorful petals.
Fill in the blanks: Colorful petals attract to the plant and this helps the plant to .
- Awater, survive
- Bpollinators, grow
- Cpollinators, be protected
- Dpollinators, reproduce