Grade 3 Structures of Life Unit 1 class notes

F.Q. Where do seeds come from? Where are
seeds found on plants? Can a seed grow without
soil? What effect does water have on seeds?
How much water can a seed soak up?
1.Seeds develop in the part of the plant called
a fruit. Seeds hold food for the plant. Seeds
are alive, but dormant (resting and inactive
2.Different kinds of seeds have different kinds
and number of seeds. Seeds have a variety of
property: shape, size, texture, color etc.
3.Seeds undergo changes when water is added
to them, they become bigger and heavier. They
also begin to grow and develop when placed in
4.A seed is an organism, a living thing. A seed
contains the embryo (baby plant that has tiny
leaves and roots), and stored food and water
(cotyledon) for the plant. The seed coat is the
layer covering the seed.
5.Mold is the slimy or cotton like growth that
develops on moist material.
6.A fruit is the structure of a flowering plant
where the seeds are found.
F.Q. What effect does water have on the
seeds in the minisprouter? How do the plants
change over time? How can we grow plants
without soil? What conditions do plants need in
order to grow? What is the sequence of the
bean plant's life cycle?
1.When a seed begins to develop or grow, after
it is dormant (at rest), it is called germination.
2.Growth is when an organism gets bigger and
more complex.
3.All living things are organism, including plants
and animals.
4.Plants need water, light, and nutrients. Plants
need soil for support, and nutrients. Support
and nutrients can be provided in other ways,
like through hydroponics (growing plants in
water and nutrients).
5.Nutrients are essential (important) chemicals
healthy plants need.
F.Q. What are the structures of a crayfish?
What do we need to think
about in order to build a suitable habitat for
the crayfish in the classroom?
What do the crayfish do when something
happens to them? Does each crayfish have its
own house that it always goes to? How can we
keep track of crayfish movements over many
1.Crayfish have different structures (body
parts) that we can observe.
2.Crayfish have particular requirements for life,
including clean, cool water; food; and shelter.
3.Habitat is where an animal lives. Behavior is
what an animal does.
4.A territory is the part of an animal's habitat
that it defends against others of its own kind.
Some animals claim a territory that they
protect from other animals.
5.Crustaceans are a class of mostly aquatic
animals that have hard, flexible shells, jointed
legs, and two pairs of antennae.
6.Elodea is a kind of aquatic plant that crayfish
7.Molting is when an animal shed its skin as it
grows when its hard shell becomes too small
for its body. Crayfish are soft and its shell will
feel rubbery during molting, which can be
dangerous if it is attacked.
F.Q. What structures do land snails have?
What does a snail need in its habitat? What
functions (jobs) do land snail's structures (body
parts) serve? How are the structures of the
land snail and crayfish alike and how are they
1.Land snails have a coiled shell, a large foot on
which they glide, and a body with a variety of
2.Land snails need water, vegetables or fruit,
air and space to survive.
3.An organism's structures have functions (jobs)
that help it survive in its habitat.
4.The structures found on different kinds of
organisms can show similarities and
F.Q. What structures do bess beetles have?
What does a bess beetle need in its habitat?
How are the structures of the beetle and
crayfish alike and how do they differ?
1.Bess beetles are insects. They have six legs,
three body parts, two antennae, two jaws, and
a horn.
2.Bess beetles need water, food (wood), space,
and air in their habitat.
3.Organisms have some similar structures and
some differences.
4.An organism's structures (body parts) have
functions (jobs) that help it survive (stay alive)
in its habitat (home).