2026 Grade 4 Science Review- Chapter 1 & 2

Plant Structures

100

True or False? Xylem is an external plant structure

FALSE

200

The plant part that supports the leaves, fruit, and flowers is the

STEM

300

The stem that is usually thin and lives through one growing season is a _______ stem

SOFT, GREEN

400

Tiny openings on the underside of a leaf that take in carbon dioxide and let out oxygen are called

STOMATA

500

The tiny, internal structures in leaves that take in sunlight and where photosynthesis happens are called

CHLOROPLASTS

Plant Functions

100

An example of a plant root we eat is ...

CARROT

RADISH

POTATO

200

What structures protect plants from predators?

THORNS & SPINES

BARK

Some plants also have toxins, bad taste, sticky liquids

300

God's design for photosynthesis provides for people and animals

OXYGEN

400

Two external structures of a plant that help with reproduction are

1. FLOWERS
2. FRUITS

500

 The process by which plants use energy from the sun, carbon dioxide, and water to make food is called

PHOTOSYNTHESIS

Flowers + Fruits

100

The flower part that attracts insects with its color is

PETAL

200

The transfer of pollen from the stamen to the pistil is called

POLLINATION

300

 Plants can be pollinated by

1. SELF-POLLINATION
2. ANIMALS
3. WIND

400

The flower part that produces pollen is

ANTHER

500

The flower part that receives pollen

PISTIL

Seeds + Roots

100

The long, thick root that grows straight down from the stem is

TAPROOT

200

The seeds of a flowering plant are produced in

OVARY

300

The part of the seed that will become the new plant is the

EMBRYO

400

Which part of the seed provides nutrients to a growing plant (when its leaves are not yet ready for photosynthesis?)

COTYLEDON

500

A seed in a packet will not germinate (sprout). Why? 

Three conditions that most seeds need to germinate are

1. AIR
2. PROPER TEMPERATURE
3. WATER

Surprise!

100

Broccoli is an example of __________ that people eat

FLOWER

200

Is this correct? YES or NO (read each step carefully)

1. Anther makes pollen.
2. Pollen goes down the pistil to the ovary.
3. Seeds form in the ovary.
4. Fruit forms around the seeds.
5. The seed can then grow into a new plant of the same kind
   
   

YES

300

The hard, outer covering that protects the woody stem of a plant is called

BARK

400

internal structure that moves water from the roots to the leaves is the

XYLEM

500

Seeds can be dispersed by

1. ANIMALS
2. PEOPLE
3. WIND
4. WATER