Lesson Worksheet: External Structures of Plants Science • 4th Grade
In this worksheet, we will practice identifying external structures of plants and describing their functions.
Q1:
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
Q2:
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
Q3:
External structures of plants can be easily seen from the outside.
Are the thorns of this cactus external structures?
- AYes
- BNo
Q4:
Which external structure on this rose plant stops animals eating it?
- AThe leaves
- BThe flower
- CThe prickles
Q5:
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
Q6:
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
Q7:
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.
- Astamen
- Bpistil
- Csepal
Q8:
What is the function of the sepal?
- AIt produces pollen.
- BIt protects the flower as it develops.
- CIt receives pollen.
Q9:
Look at the given diagram.
What is the missing label?
- AStamen
- BSepal
- CPistil
Fill in the blank: This is the part of the flower. It receives the pollen from the stamen.
- Amale
- Bfemale
Q10:
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
Practice Means Progress
Boost your grades with free daily practice questions. Download Nagwa Practice today!
