Biology and Physics Quiz
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Human Food Sources

  • Humans obtain food from plants and animals.
  • Food can be derived from both plants and animals, hence, both options a and b are correct.

Distance Traveled per Unit of Time

  • The distance traveled per unit of time is called speed.

Number of Electrons in Aluminum

  • Aluminum has 13 electrons.

Laws of Motion

  • There are five laws of motion.

Pairs of Nerves in the Human Body

  • There are 31 pairs of nerves in the human body.

Examples of Light Waves

  • Light waves, radio waves, and X-rays are examples of transverse waves.

Body Systems (Blood Movement)

  • The circulatory system moves blood throughout the body.

Cellular Respiration

  • Cellular respiration needs glucose and oxygen to produce energy, releasing carbon dioxide and water as byproducts.

Light Travel in Air

  • Light travels in a straight line in air.

Vascular Bundles in Plants

  • Vascular bundles in plants are composed of xylem and phloem.
  • Xylem and phloem are present with root hair cells.

Tube Arising from Kidneys

  • The tube arising from each kidney and entering the urinary bladder is called the ureter.

Reading, Writing, etc

  • Actions such as reading, writing, driving, and speaking are voluntary.

Calculating Speed

  • Speed is calculated by dividing distance by time.

Gravity Discovery

  • Isaac Newton discovered gravity.

Material That Traps Air

  • Materials such as fur, wool, and sawdust trap air, and are good insulators.

Anemia

  • Anemia is a condition where the body cells are deficient in oxygen.
  • Anemia leads to tiredness and pale complexion.

Body Part Filtering Waste

  • The kidneys filter nitrogenous waste from the blood.

Removal of Nitrogenous Waste

  • The process of removing nitrogenous waste from the body is called excretion.

Right Atrium's Function

  • The right atrium receives deoxygenated blood.

Brain Weight

  • The average human brain weighs between 1500 and 1600 grams.

Oxygen Atoms

  • Oxygen atoms contain 8 protons, 8 neutrons, and 8 electrons.

Toothache Cause

  • A toothache is caused by a cavity in the tooth, where bacteria cause acid production that damages the enamel and nerves.

Use of Hand Sanitizer

  • Hand sanitizer kills harmful germs, keeping the skin safe.

Genetic Modification Objectives

  • Genetic modifications can improve plant qualities, such as making them disease-resistant, herbicide-resistant or increasing nutrient levels.

Dissolving Solids in Liquids

  • When a solid dissolves in a liquid, the liquid is called a solvent.

Heat Transfer in Fluids

  • Heat transfer caused by differences in density in fluids is called convection.

Atom Components

  • The nucleus of an atom contains protons and neutrons.

Nephron Function

  • The nephron is responsible for forming urine.

Substances Changing on Heating

  • Substances that change shape or form when heated but recover their original state on cooling are undergoing physical changes.

Parts of Trachea

  • The trachea consists of bronchi, bronchioles and alveoli(air sacs), where gas exchange occurs.

Best Way to Prevent Rusting

  • Preventing metal rusting can be done effectively via galvanization.

Classifications of Humans

  • Humans are categorized as heterotrophs.

Substance Exchange in the Body

  • Exchanges of substances between blood and body cells take place in the capillaries.

Speed Calculation

  • Speed is calculated by dividing the distance traveled by the time taken to travel that distance.

Direction of Motion in Forces

  • Every action has an equal and opposite reaction that's acting in a parallel direction.

State Change Process

  • Processes like evaporation, sublimation and condensation involve changes in the state of matter (solid, liquid, gas).

Sensory Neuron Direction

  • Sensory neurons carry messages from sensory organs towards the brain.

Types of Immunity

  • Innate, adaptive, and passive are three main types of immunity.

Blood Component

  • Plasma is the liquid component of blood.

Cell Structure Controlling Cell Activity

  • The nucleus is the part of the cell that controls the activities within the cell.

Parasite Food Source

  • Parasites obtain food from a variety of sources, including plants, insects, animals, and other sources.

Important Constituent in Living Organisms

  • Proteins are essential for all living organisms.

Organisms Making Their Own Food

  • Organisms that can make their own food are called autotrophs.

Antibody Function

  • Antibodies are proteins in blood that help fight against foreign viruses and bacteria.

Controlling Heartbeat and Blood Pressure

  • The medulla oblongata controls involuntary functions such as heart rate and blood pressure.

Changes in Milk

  • The transformation of milk into yogurt involves irreversible changes and is a chemical process.

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HRCA Science Grade 7-8 PDF

Description

Test your knowledge on various topics related to human biology and physics, including food sources, laws of motion, and cellular respiration. This quiz covers fundamental concepts that are essential for understanding life sciences and physical science.

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