نموذج تدريبي هيكل امتحان العلوم الصف 4 Inspire الفصل 3

نموذج تدريبي هيكل امتحان العلوم الصف الرابع Inspire الفصل الثالث

Questions

1) What are the basic needs of plants

Water, sunlight, air, space, and nutrients

 What is the gas that the plant needs to make food

Carbon dioxide

What is the gas that the plant needs to break down food

Oxygen

 Which structure in plant allows the sunlight and carbon dioxide to enter to the plant ? Stomata on leaves

 How plants get energy ? They make their own food

(plant parts )

Most plants have roots, stems, and leaves. These parts. or structures, help the plant meet its needs and carry out life functions

Roots

Plant roots take in water and dissolved nutrients from the soil. Roots also hold the plant in place. Some roots store the plant has made

Stem

The stem supports the plant. It is also part of a plant’s transport system There are two types of stems: soft stems and woody stems. Soft stems are green and are flexible. Woody stems are hard and are often covered in bark. Tree trunks are examples of woody stems

Stems also allow materials to move inside the plant through a system of tubes. The in the stems carry water and dissolved nutrients

Questions

 Which part of the plant that takes in water and nutrients ? Roots

 Which part of the plant supports the plant and transport water and nutrients ? Stem

 Which part of the plant captures the light and exchange the gases ? Leaves

Which part of the plant allow it to take carbon dioxide and sunlight ? Leaves

*Maybe they will be asked to write one function for each part of the plant

Page 14 (plant reproduction *less )

Plant Reproduction

Plants have many structures that are used for reproduction. Some of the structures are flowers, cones, seeds. and fruits

Flowers

Most flowers contain male and female parts. The stamen is the male part. It contains the anther, where pollen is produced. The pistil is the female part. It contains the ovary, where egg cells are produced. Insects. birds. and wind help move pollen. Fertilization occurs once the content inside the pollen joins the egg cells inside

Although flowers •

: come in different colors and shapes. they all contain the same structures used in reproduction the ovary. Seeds develop after fertilization

Cones

Some seed plants reproduce with cones. These plants usually produce both male and female cones. The male cones produce pollen that is released into the wind The female cones produce a sticky liquid that captures the pollen. Fertilization occurs in the female cone

(Questions (flowers

1) What are the reproduction parts of plants

Flower, cones, seeds, and fruit

2) What is the male part of the flower

Stamen that contains the anther where pollen are produced

3) Which is the female part of the flower

Pistil that contains the where eggs are produced ovary

 What takes the pollen from the anther to the ovary

Insects, birds, and winds

5) What is fertilization

When the content of the pollen joins the egg

Questions (Structural adaptations)

1) What is structural adaptation

Changes in the physical features of an organism to help them survive and reproduce

What are the examples of structural adaptations

Fur color, long limbs, strong jaws, and fast running

3) What is camouflage

Any coloring or shaping that allow the plant to blend with it environment

3) What is mimicry

Resemblance of another animal or object

Page 35 (behavioral adaptations)

Behavioral Adaptations

Animals Survive to learn more An adjustment in an organism’s behavior is a behavioral about what helps animals adaptation. For example, many animals travel in herds stay alive

for protection from predators. Others, such as wolves, hunt in packs to capture larger prey

Many animals— such as birds, butterflies, and fish— migrate. Migration is the movement of animals from one place to another Animals migrate to find food, reproduce in better conditions, or find a less severe climate

Some animals endure cold winters by hibernating Hibernation is a period of inactivity during cold weather

During this time, animals remain inactive until warmer temperatures return in spring. Grizzly bears prepare for hibernation around November. They will not eat. drink or eliminate bodily wastes during hibernation, which lasts approximately five months

Questions (behavioral adaptations)

1) What is behavioral adaptation

An adjustment in organism’s behavior

 What are the examples of behavioral adaptations

Travel in herds to protect themselves from predators

3) What is migration (W)

Movement of animals from one place to another to find fooc reproduce, or less severe climate

3) What is hibernating

Period of inactivity during cold weather

Questions (sensory organs)

1) What are the sensory organs

Eyes, ears, nose, tongue, and skin

2) What is the function of sensory organs

Gather information from outside the body

3) What are the five senses

Sight, hearing, smell, taste, and touch

Colossal squids: big eyes that allow them to see in dark

Elephants: big ears to communicate with far elephants antennae to leave a scent after finding food

Ants: Butterflies: use their feet to taste leaves (other animals senses)

Page 63

Other Animal Senses

Some animals have senses that humans do not have. Pit vipers and some other snakes have sensory organs that detect infrared light given off by their warm-blooded prey. The light enters a small pit organ, which is located between the snake’s eye and nostril. A heat-sensitive part in the organ sends a message to the brain. and the snake strikes

The duck- billed platypus uses its bill to detect weak electrical fields put out by animals as they move. The bill can also detect movement in the water. The platypus uses this information to quickly locate its prey

Some bats use echoes to help them navigate and locate prey Echolocation iS the process of finding an Object by using reflected sound or echoes. These bats send out a high-pitched sound. This sound hits the prey and bounces back to the bat The bat then interprets this echo to judge the direction and distance of its prey. Some whales and dolphins use echolocation to gather information from their environmen

(Questions (the nervous system 3

1) What is the nervous system

Set of organs that uses information from the senses to control all body systems

2) Central nervous system made up of

brain and spinal cord

3) Peripheral nervous system made up of

Nerves

(Questions (the nervous system

1) What is the function of the brain

Interpret messages received from and send messages to all organs

2) What is the function of the spinal cord

Carries messages to and from the brain

So if the rabbit saw a fox the message will go from the eyes to the spinal cord to the brain and the brain will send nerves to the nerve to run and hide

(Questions (stimulus and response

1) What is the function of sensory receptors

Detect different types of stimulus from the environment

2) What will happen if there is a stimulus

The brain will tell the body how to response (reflexes)

Page 65 Reflexes

The body responds in different ways to stimuli A reflex is a quick reaction that occurs without waiting for a message to be sent from nerves to the brain. For example. touching something hot causes the hand to quickly pull away. No conscious thought is involved in this response. Instead. this reflex is an action controlled by the spinal cord

 Describe a type of technology or tool that has been designed to improve a human sense

Sample answer Eyeglasses are a technology that helps people see better

(Questions (stimulus and response

1) What is reflex

Quick reaction that occurs without waiting for a message to be sent to the brain. Its controlled by the spinal cord

2) Example of reflex

Touching hot cup causes the hand to quickly pull away

(reflection and refraction  (Page 78

Recall how the beam of light traveled in the Inquiry Activity How Light Travels. Light has the properties of reflection and refraction

Reflection is the bouncing of light waves off a surface. Most of the light that reaches your eye is reflected light. Look at your desk. If the desk did not reflect light. you could not see it. Most surfaces reflect at least some light. Smooth, shiny surfaces such as mirror reflect almost all of the light falling on them. Dull. rough surfaces reflect the least amount of light. The colors that you see are the colors that are reflected from objects When light reflects off a surface. it changes direction. Think about the mirror and flashlight in the Explore activity. The light rays moving toward a surface are the incoming rays. The reflected light rays are the outgoing rays. The angles of the incoming and outgoing rays are always equal. This is called the law of reflection. The image you see in the mirror is a -picture” of the light source that light rays make when bounced off a polished, shiny surface

Questions (the human eye)

1) Human eye use reflection or refraction

Use both reflection and refraction

2) What does the lens in eyes do

Refracts the light to hit the retina in the back of the eye

(how animals use their e)

Page 83 How Animals Use Their Eyes

The eyes of predators, animals that hunt other animals. are usually on the front of their head. This helps them to see how far away something is, especially when hunting for other animals. The eyes of prey, animals that predators eat, are usually on the sides of their heads. This helps them to see danger coming from the side and from behind them

Most fish have eyes on the sides of their heads. These eyes have special structures that allow fish to see movement underwater. This feature helps fish see creatures that may want to eat them. It also helps fish catch prey moving past them

Questions (how animals use their eyes)

Why predators eyes are on the front of their head

Help them to see how far something is (hunting)

 Why prey eyes are on the sides of their head

Help them see danger coming from the side and behind them

3) Why lions can see at night

Because they have reflectors in their eyes which make them appear to glow

Questions (how animals use their eyes)

4) Why insects have compound eyes

They have thousands of lenses that allow them to detect danger from all directions

How the eyes of owl help them to see at night

They are hundred times more sensitive to light than humans