Elementary Science Department
Semester 1
GRADE 4
Homework 2 (3.2)
Name: ____________________
Date: _______________
1) Label the following diagram:
1- ---------------------------------2- -----------------------------------3- ------------------------------------4- ------------------------------------5- -------------------------------------
2) Choose the correct answer:
1. An empress tree is a flowering plant. This tree’s flowers have blue and
violet markings. What is the main role of the colored markings on the
flowers?
to protect the plant from the sun
to produce pollen for reproduction
to attract insects to carry pollen
to disperse seeds to other parts of the local environment
1
2. The cedar tree is a non flowering plant. The orange blossom tree is a
flowering plant. Both trees have similar life cycles. What is the order of
events in the life cycles of both plants?
seed, pollination, seed dispersal, fertilization
pollination, seed, seed dispersal, fertilization
fertilization, pollination, seed, seed dispersal
pollination, fertilization, seed, seed dispersal
3. The table lists some features of the green briar vine.
Green Briar Vine Plant
Feature
Description
Flower
small, green-white
growth pattern
tall, twining
Leaf
pointed, shiny
Stem
woody, with thorns
 The life cycle of a green briar vine includes sexual reproduction. Which
Part of the plant is used for sexual reproduction?
flower
leaf
growth pattern
stem
4. Mosses and ferns reproduce by:
A -seeds
C-Spores
B-pollination
D- fertilization
2
3) Complete using words from the box:
germination – maturity – fertilization – pollination - spore
1- --------------------------- is a cell that can grow into a new plant when the
conditions are right.
2- ------------------------- is when plant grows to its full size.
3-------------------------is the process of pollen moving from a male part to a
female part.
4-When a seed sprouts and the embryo starts to grow, it is the
------------------------------------ step.
5- ------------------------ is the process of a sperm (pollen) and an egg joining
together.
4) :Match :
1-A cell that can grow into a new plant. (
2-Attract insects for pollination. (
)
a- sexual reproduction.
)
3-Flowers and cones are responsible For. (
b- anther.
)
4-Part of the flower that makes the egg cells.(
5-Part of the flower that makes the sperm cell. (
c- Petals.
)
d- Spores.
) e- pistil.
5) Put (√) or (x) :
3
1- The common thing between flowers and cones is that they both produce
spores. (
)
2- For a spore to grow onto a new plant, it needs sunlight, air and water
(
)
3- Air helps in spread of seeds.(
)
4- Pollination is joining of a sperm cell with an egg cell. (
)
6) Answer the following questions:
1-Why are honey bees very important in the plant reproduction?
……………………………………………………………………………………………………………..
……………………………………………………………………………………………………………..
……………………………………………………………………………………………………………..
2- The picture below shows the stages of seed germination.
Why does the root of the plant emerge before any other part?
……………………………………………………………………………………………
…………………………………………………………………………………………….
…………………………………………………………………………………………….
4