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?

green cactus in potting soil
  • 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 .

Tree
  • Awoody, bark
  • Bsoft, prickles
  • Csoft, bark
  • Dwoody, prickles

Fill in the blanks: These plants have stems. These stems are green and .

Blue flowers, stems and leaves of valuable forage crops
  • 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.

orange tulips top view

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!

scan me!

Nagwa uses cookies to ensure you get the best experience on our website. Learn more about our Privacy Policy.