Science Revision Year 8

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Questions and Answers

What does the acronym STD stand for?

Skin transmitted disorders

Simple transmitted diseases

Systemic toxic diseases

Sexually transmitted diseases (correct)

Which of these is a symptom of gonorrhea?

Sore throat

Headache

Chest pain

Frequent and painful urination (correct)

HIV/AIDS primarily affects which body system?

Digestive system

Immune system (correct)

Skeletal system

Nervous system

Which virus is responsible for AIDS?

HIV Signup and view all the answers

What type of immune cells are specifically targeted by HIV?

White blood cells Signup and view all the answers

Which method can reduce the risk of contracting HIV?

Abstaining from sharing needles Signup and view all the answers

Which organ is primarily affected by long-term alcohol abuse?

Liver Signup and view all the answers

What is a common effect of smoking on the respiratory system?

Decreased oxygen absorption Signup and view all the answers

What is the term for the misuse of a substance to achieve a non-therapeutic effect?

Drug abuse Signup and view all the answers

What is the primary health risk associated with glue sniffing?

Respiratory damage Signup and view all the answers

What does immunization help the body to do?

Fight infections Signup and view all the answers

What is the body’s first line of defense against pathogens?

Skin and mucous membrane Signup and view all the answers

How do bacteria reproduce?

Binary fission Signup and view all the answers

Viruses can only replicate:

Inside living cells Signup and view all the answers

What do bacteria need to grow and reproduce?

Moisture and warmth Signup and view all the answers

The body’s immune system protects against:

Pathogens Signup and view all the answers

What type of skeletal system is present in flatworms?

Hydrostatic skeleton Signup and view all the answers

What type of skeletal system do humans possess?

Endoskeleton Signup and view all the answers

Which part of the skeleton is responsible for protecting the brain?

Cranium Signup and view all the answers

Where does hemopoiesis primarily occur?

Red bone marrow Signup and view all the answers

What is the main function of the axial skeleton?

Support Signup and view all the answers

Which skeleton does the backbone or spine belong to?

Axial Signup and view all the answers

What is a characteristic of living things?

Growth Signup and view all the answers

What is the primary purpose of the rib cage?

Protection of vital organs Signup and view all the answers

What is one function of the female reproductive system?

To protect the embryo from infection Signup and view all the answers

Which sequence correctly represents the fertilization process?

C, B, A, D Signup and view all the answers

What is a common symptom experienced prior to menstruation?

Breast tenderness Signup and view all the answers

Which of the following is NOT a part of the skeletal system?

Heart Signup and view all the answers

What describes the role of the fertilized egg after it has been fertilized?

It embeds into the lining of the uterus Signup and view all the answers

Which poultry rearing system is characterized by individual or group cages?

Battery system Signup and view all the answers

Which of the following should be provided in a poultry house to prevent cannibalism?

Enough feeding space Signup and view all the answers

In which rearing system do chickens have unrestricted outdoor access?

Free-range system Signup and view all the answers

Which of the following is a disadvantage of the battery system?

Increased disease risk Signup and view all the answers

Which material is best for building poultry houses to prevent predators from entering?

Metal mesh Signup and view all the answers

The temperature inside a poultry house should be:

Warm but well-ventilated Signup and view all the answers

Which system helps keep eggs clean and reduces waste contamination?

Battery system Signup and view all the answers

Which of the following birds is not commonly classified under poultry?

Eagle Signup and view all the answers

What is the function of the eyelid?

It protects the eye and spreads tears to keep it moist Signup and view all the answers

Which part of the eye is known as the 'white part'?

Sclera Signup and view all the answers

What role does the pupil play in the eye?

Allowing light to enter the eye Signup and view all the answers

Which of the following statements describes broilers?

Chickens that are raised for meat production purposes Signup and view all the answers

What best defines a broody hen?

A hen that sits on the eggs until they hatch into chicks Signup and view all the answers

What is Coccidiosis?

An infection caused by parasites Signup and view all the answers

Which disease is caused by a virus affecting chickens?

Newcastle Signup and view all the answers

What is considered a characteristic of Layers?

Raise primarily for egg production Signup and view all the answers

Study Notes

Science Revision Booklet - Year 8

Plant Anchoring: The root anchors the plant.
Flower Parts: The stamen is the male part of a flower.
State Change: When a liquid turns into a gas, it is called evaporation.
Seed Dispersal: Seeds can be dispersed by movement and carrying.
Plant Growth Factors: Four things needed for plant growth are: water, sunlight, nutrients, and air/carbon dioxide.
Plant Nutrients: Plants need nutrients for growth because nutrients provide the building blocks for plant tissues.
Fertilization and Ovules: When a flower is fertilized, the ovule develops into a seed.
Pollen Movement: Pollen moves from the flower to the flower.
Seed Dispersal Methods: A method to disperse seeds is the use of wind or animals.
Plant Parts and Functions:
- Root: Anchors the plant, absorbs water and nutrients.
- Stem: Transports water and nutrients throughout the plant, supports the plant.
- Leaf: Makes food for the plant through photosynthesis.
- Flower: Attracts pollinators, aids in reproduction.
Photosynthesis Process: The process that uses sunlight, carbon dioxide and water to create energy (glucose) for the plant.
Photosynthesis Location: Photosynthesis happens in leaves and other green parts of plants.
Photosynthesis Factors: Four factors critical for photosynthesis: light, water, carbon dioxide, and temperature.
Plant Organism List: Four of the many kinds of organisms capable of photosynthesis include trees, plants, algae, and some bacteria.
Plant Diagram Labeling: Students need to label the parts of a plant diagram using a word bank.
Flower Diagram Labeling: Students need to label the parts of a flower diagram using a word bank.
Human Health Education:
- STD: Sexually transmitted diseases.
- Gonorrhea Symptom: Frequent and painful urination.
- HIV Infection Impact: HIV can weaken the immune system.
- HIV Transmission Prevention: Abstaining from sharing needles is a good method for preventing HIV transmission.
- Alcohol Abuse: Long-term alcohol abuse can cause significant damage to the liver.
Immunization and Bacteria: Immunization helps fight off infections and bacteria.
Bacteria Reproduction: Bacteria reproduce through binary fission.
Bacteria Characteristics: Bacteria can be harmful, produce toxins, aid in digestion, and spread infections.
Types of Organisms: Organisms including bacteria, plants, and animals rely on various essential functions for sustaining life.
Animal Characteristics/Skeletal Function:
- Flatworms: Have a hydrostatic skeleton.
- Human Skeleton: Endoskeleton.
- Axial Skeleton: Provides support for the body.
- Appendicular Skeleton: Supports the limbs, including the spine.
- Hemopoiesis Location: Red bone marrow.
Reproductive Function: The female reproductive organs include the ovaries, uterine tubes, uterus, and vagina. The male reproductive organs are the testes, seminal vesicles, and penis.
Fertilization Location: Fertilization normally occurs in the Fallopian tube.
Menstrual Cycle: The menstrual cycle includes the menstrual period and ovulation.
Sperm Structure: Acrosome helps a sperm to penetrate the egg.
Sperm/Egg Characteristics: Sperms and eggs each have 23 chromosomes.
Plant Parts (continued):
- Stigma: Receives pollen.
- Style: Connects stigma to the ovary.
- Ovary: Contains ovules; develops into fruit.
- Anther: Produces pollen.
- Filament: Supports the anther.
Environment/Conservation:
- Tree Conservation: Conserving trees helps control soil erosion and improves air quality.
- Water Conservation Methods: Examples are using conservation methods like rainwater harvesting, and reducing water evaporation.
- Photosynthesis and Oxygen: Photosynthesis is the process that produces oxygen.
Agriculture:
- Egg/Meat Poultry:** Broilers are reared for meat production and layers for egg production.
- Free-Range System: Provides better access to natural food.
- Poultry Housing Characteristics: A good poultry facility is well-ventilated and protected from predators.
- Incubation Types: Natural and artificial incubation.
Light:
- Eyelid Function: Protects and moistens the eye.
- Pupil Function: Controls light entering the eye.
- Retina Function: Converts light signals into electrical signals.
- Lens Function: Focuses light onto the retina.
- Eye Parts: Include cornea, iris, lens, and retina.
- Short vs. Long-Sightedness: Affect the ability to see, corrected by lens adjustments.
- Light Transmission and the Eye: Describes various light related aspects of the eye.

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Description

This quiz covers essential topics in plant biology for Year 8 students. It includes information on plant anchoring, flower parts, seed dispersal, and factors affecting plant growth. Test your knowledge and understanding of how plants function and thrive in their environments.