Science Primary 4 First Semester Quiz

Skeleton and Bones

• Bones are hard and strong, providing shape and support for the body.
• The skeleton is a frame made of bones that gives structure and protects vital organs.
• Key bones include the skull (head), spine (back), rib cage (chest), hip (connection between leg and body), and jaw (movable bone for eating and talking).

Muscles and Movement

• Muscles are attached to bones and enable movement through contraction (shortening and thickening) and relaxation (lengthening and thinning).
• Muscles feel different based on their state; hard when contracted and soft when relaxed.

Body Functions and Protection

• Organs perform various jobs within the body; protection is provided by bones and other structures to keep safe from harm.
• Vaccinations and medicines help prevent or treat infectious diseases caused by germs.

Energy and Its Transfer

• Energy is essential for causing movement or actions and can transfer from one object or place to another.
• Electrical appliances use electrical energy to function, illustrating a specific form of energy in daily life.

Food and Ecosystem Dynamics

• The food chain illustrates energy flow, showing relationships among producers (plants), consumers (animals), and their dietary classifications: herbivores (plant-eaters), carnivores (meat-eaters), and omnivores (eat both).
• The predator-prey relationship is critical; predators kill and eat prey to obtain energy.

Comparison and Properties of Materials

• Comparing involves examining similarities and differences between items or concepts.
• Materials have distinct properties, such as hardness in rocks or elasticity, affecting their behavior and use.

Matter and Changes

• Matter exists in different forms: solids, liquids, and gases, each identifiable by specific properties.
• A change of state occurs when matter transitions between forms due to heating (e.g., melting of solids to liquids) or cooling.

General Concepts

• Germs are tiny organisms that can cause illness and infect the body, leading to diseases.
• Instructions guide actions, such as assembling models or executing scientific investigations.
• Understanding functions and characteristics is vital for grasping how various systems and processes work.

This quiz covers key vocabulary related to human anatomy for Primary 4 science. Students will explore terminology such as bones, frame, hip, jaw, and model, which are essential for understanding how our bodies work. Prepare to test your knowledge on these fundamental concepts.