WorksheetsPage 8
Total questions: 153
Worksheet time: 1hrs 16mins
What is the main function of the heart?
To filter waste from blood
To pump blood all throughout the body
To exchange gases with the lungs
To produce hormones for the body
Where is the heart located ?
Centered exactly in the middle of the chest
Between the lungs, slightly to the left
Directly beneath the right lung
Above the collarbone on the left side
What is the approximate size of the heart ?
About the size of your clenched fist
About the size of your open hand
About the size of a tennis ball
About the size of your forearm
Which statement best describes the circulatory system?
It is the body’s network of bones and muscles.
It is the body’s transport system of blood vessels and blood.
It is the body’s digestive pathway for nutrients.
It is the body’s nervous network of neurons and signals.
What alternative name for the circulatory system is given ?
Respiratory system
Endocrine system
Cardiovascular system
Skeletal system
What does the term "cardiovascular" refer to?
The muscles and tendons of the chest
Anything pertaining to the heart or a channel or passage through which blood passes
Only the lungs and airways
Any organ that produces hormones
Which are listed as the upper chambers of the heart?
Left and right ventricles
Left and right atria
Septum and pericardium
Aorta and vena cava
Which are listed as the lower chambers of the heart?
Left and right ventricles
Left and right atria
Right atrium and left ventricle
Aorta and pulmonary artery
What does the septum do?
Pumps blood to the lungs
Separates the left side and right side of the heart
Carries oxygen into the bloodstream
Regulates heartbeat rhythm
What is the role of the pericardium ?
It circulates blood throughout the body.
It protects the heart and keeps it in place within your chest.
It transports oxygen from the lungs to tissues.
It controls electrical signals in the heart.
Which statement best defines a homogeneous mixture according to the notes?
A mixture that has a uniform composition throughout
A mixture that has visible layers and does not mix evenly
Two liquids that do not dissolve in each other
A pure substance with a fixed composition
What describes a heterogeneous mixture?
A mixture with uniform composition at all points
A mixture that does not have a uniform composition
A solution of solute and solvent
Two soluble liquids that dissolve each other
When are liquids called miscible?
When two insoluble liquids separate into layers
When two soluble liquids dissolve each other
When a solute dissolves in a solvent
When a mixture has a uniform composition
Which term is used when two liquids are insoluble in each other?
Soluble
Immiscible
Homogeneous
Heterogeneous
What is the solvent?
The substance being dissolved
The substance in which the solute is dissolved
A mixture that lacks uniform composition
Two liquids that do not mix
Which definition matches solute?
A substance that is dissolved in a solution
A substance that dissolves other materials
A mixture with uniform composition
Two liquids that dissolve each other
How do we define a solution?
A pure substance with fixed composition
A heterogeneous mixture with uneven distribution
A homogeneous mixture having two or more components that are uniformly distributed
Two insoluble liquids forming separate layers
Which pair correctly matches the term with its description ?
Homogeneous mixture — not uniform composition
Heterogeneous mixture — uniform composition throughout
Miscible — two soluble liquids dissolve each other
Immiscible — solute dissolves solvent
Select the best example description that fits immiscible liquids based on the notes.
Two liquids combine to form a single uniform layer
Two soluble liquids dissolve each other completely
Two liquids remain separate because they are insoluble in each other
A solute spreads evenly in a solvent
Which statement is true about solutions ?
Solutions are heterogeneous mixtures of a solute and solvent
Solutions are homogeneous mixtures with components uniformly distributed
Solutions contain only one component and never mix
Solutions are formed only by insoluble liquids
Heart valves control blood flow through the heart by opening and closing at the right time. Which statement best describes their main function?
They pump blood like muscles
They prevent backflow of blood between heart chambers
They absorb oxygen from the lungs
They create new red blood cells
There are four types of heart valves in humans. Which set lists all four correctly?
Tricuspid, bicuspid (mitral), pulmonary, aortic
Tricuspid, bicuspid, carotid, vena cava
Mitral, atrial, ventricular, aortic
Pulmonary, aortic, septal, coronary
Which statement correctly defines congenital heart defects?
Heart conditions caused only by aging
Conditions present at birth that affect the heart and the way it works
Temporary heart problems after intense exercise
Infections that occur in the heart during childhood
Match each heart valve to the side of the heart it serves. Choose the best side for each valve.
Tricuspid valve — right side of the heart
Bicuspid (mitral) valve — left side of the heart
Pulmonary valve — left side of the heart
Aortic valve — right side of the heart
Which statement best explains why blood is referred to as the “river of life”?
It is the only liquid found in the body.
It circulates to deliver needed substances and remove wastes for different body processes.
It stays in the heart and helps valves open and close.
It is present only at birth to start body functions.
Select the functions that blood performs in the body.
Carrying needed substances to body cells
Removing wastes from body cells
Keeping the heart’s valves from leaking
Regulating body temperature
Which component of blood is the liquid part that transports substances?
Plasma
Red blood cells
Heart valves
Hemoglobin
What is the main function of red blood cells as described?
Clotting blood at wounds
Carrying oxygen using hemoglobin that contains iron
Producing body heat directly
Filtering wastes out of plasma
Which description correctly matches hemoglobin?
A protein in plasma that digests food
A protein in red blood cells that contains iron and carries oxygen
A valve in the heart that prevents backflow
A sugar in blood that provides energy to cells
Why would a person die without blood circulation?
Cells would receive too much oxygen.
Needed substances would not reach cells and wastes would not be removed.
The heart would stop producing plasma immediately.
Valves would open too widely.
Which pair lists a blood component and its role correctly?
Plasma—solid part that forms scabs
Red blood cells—carry oxygen using hemoglobin
Heart valves—carry nutrients to cells
Hemoglobin—liquid that controls body temperature
Select all statements that correctly describe how oxygen and carbon dioxide are moved by blood in the body.
Oxygen is carried from the lungs to tissues.
Carbon dioxide is carried from tissues to the lungs.
Oxygen is carried from tissues to the lungs first, then to the heart.
Carbon dioxide is stored in muscles until it is needed for breathing.
Which explanation correctly connects blood color with its function in gas transport?
Blood is red because it carries oxygen in red blood cells.
Blood is blue while carrying carbon dioxide and turns red only in skin.
Blood is colorless and appears red due to body temperature.
Blood is green because oxygen reacts with white blood cells.
White blood cells (WBCs), also called leukocytes, are described as the "soldier of the body." Which statement best explains why they have this nickname?
They carry oxygen from the lungs to tissues.
They fight and defend the body against infections and diseases.
They help blood to clot at a wound site.
They give blood its red color.
How do the numbers of white blood cells compare to red blood cells (RBCs) in the body?
WBCs are more numerous than RBCs.
WBCs and RBCs occur in equal numbers.
WBCs are fewer than RBCs.
There are no RBCs when WBCs are present.
Which options list the two types of white blood cells ?
Platelets and hemoglobin
Phagocytes and lymphocytes
Neurons and hormones
RBCs and plasma
What is the primary function of platelets (also called thrombocytes) as described in the notes?
Transport carbon dioxide from tissues to the lungs
Form blood clots to prevent loss of blood when tissues are damaged or cut
Attack invading bacteria directly
Provide the red color of blood
Hemophilia is defined as _____________________.
A condition where blood clots too quickly, causing blockages
A condition where bleeding does not stop because the blood does not clot
A disease caused by low white blood cell count
An illness where platelets carry oxygen instead of RBCs
Platelets have an alternative name used in science texts. Which term correctly refers to platelets?
Erythrocytes
Thrombocytes
Leukocytes
Hemoglobin
Which statement best describes the main function of platelets in the blood?
They carry oxygen from the lungs to tissues.
They protect the body from infections.
They help in blood clotting to prevent blood loss.
They transport nutrients to cells.
Select all scenarios where platelets are directly involved in the body’s response.
A small cut on the skin begins to seal as a clot forms.
Antibodies attack invading bacteria.
Red blood cells deliver oxygen to a muscle.
Damaged blood vessels trigger clot formation to stop bleeding.
Why does a person with hemophilia keep bleeding after a cut?
Their blood lacks oxygen to reach the tissues
Their blood does not clot to seal the damaged or cut tissues
Their white blood cells attack platelets
Their heart cannot pump blood fast enough
Which statements about the severity of hemophilia align with the text? Select all that apply.
Even a small cut can be dangerous because bleeding may not stop
Internal bleeding can occur and may be life‑threatening
Hemophilia is always mild and never causes serious problems
Bleeding stops quickly because clots form faster than normal
Blood vessels are described as a network throughout the body. Which option correctly lists the three main types of blood vessels introduced in this lesson?
Arteries, veins, capillaries
Aorta, pulmonary artery, vena cava
Arteries, valves, ventricles
Capillaries, bronchi, alveoli
Which statement best explains the general function of arteries?
They carry blood away from the heart.
They carry blood toward the heart.
They store blood and release it slowly.
They filter blood before it reaches the lungs.
Select all features that typically describe arteries according to the notes.
Thick, muscular walls
High blood pressure within
Deeply located in the body
Wide lumen (opening)
Which statement about the pulmonary artery is correct?
It carries blood from the heart to the lungs.
It carries oxygen-rich blood to body organs.
It returns blood from the lungs to the heart.
It is the largest artery in the body.
What is the aorta described as in these notes?
The largest artery that leaves the heart
The artery that returns blood from the lungs
A small artery found far from the heart
A vein that carries blood back to the heart
According to the notes, where are larger arteries typically found compared to smaller arteries?
Near the heart for larger arteries; farther from the heart for smaller arteries
Farther from the heart for larger arteries; near the heart for smaller arteries
Only in the lungs for larger arteries; only in limbs for smaller arteries
Evenly distributed regardless of size
Which statement correctly contrasts arteries and veins based on the initial points provided?
Arteries carry blood away from the heart, while veins carry blood back to the heart.
Arteries carry blood back to the heart, while veins carry blood away from the heart.
Both arteries and veins carry blood away from the heart.
Neither arteries nor veins connect to the heart.
Which feature is mentioned for veins in the notes?
They carry blood back to the heart.
They have very high blood pressure.
They always carry oxygen-rich blood.
They are the largest blood vessels called the aorta.
Which statement best describes veins in the human body?
Veins have thick muscular walls and carry blood away from the heart.
Veins are superficially located, have thinner walls with less muscle, and carry blood to the heart.
Veins are deep, highly elastic, and always contain oxygen-rich blood.
Veins pump blood at high pressure directly to organs.
What is the primary role of the superior and inferior vena cavae?
They deliver oxygen to body tissues through diffusion.
They carry deoxygenated blood from the body back to the heart.
They transport nutrients from the intestines to the liver.
They move carbon dioxide from the lungs to the body.
Select the characteristics that typically describe veins.
Lower blood pressure than arteries
Thick elastic walls
Less muscular and relatively wide
Located superficially under the skin
Which option correctly matches each vena cava with the body region it drains?
Superior vena cava drains the lower body; inferior vena cava drains the upper body.
Superior vena cava drains the upper body; inferior vena cava drains the lower body.
Both vena cavae drain only the lungs.
Both vena cavae drain only the liver.
What is the main function performed in capillaries?
Pumping blood at high pressure
Exchange of oxygen, carbon dioxide, nutrients, and waste with body cells
Storing blood as a reservoir
Filtering blood to remove pathogens
Where does diffusion of gases and nutrients between blood and cells primarily occur?
In the veins
In the capillaries
In the vena cavae
In the heart ventricles
According to the notes, what is diffusion?
Movement of a substance from an area of low concentration to an area of high concentration
Movement of a substance from an area of high concentration to an area of low concentration
Random movement of particles without a concentration gradient
Transfer of blood from the heart to the lungs
Which statement about concentration gradient is implied by the definition of diffusion in the notes?
Diffusion occurs against the concentration gradient.
Diffusion occurs along the concentration gradient from higher to lower concentration.
Diffusion requires muscular walls to push particles.
Diffusion only happens inside veins.
Choose the pair that correctly links vessel type to direction of blood flow described in the notes.
Veins: to the heart; Capillaries: away from the heart
Veins: to the heart; Vena cavae: to the heart from upper and lower body
Veins: away from the heart; Vena cavae: away from the heart
Capillaries: to the heart; Veins: from the lungs
Which feature explains why veins generally have lower blood pressure than arteries, based on the notes?
Veins have thick muscular walls that resist flow.
Veins are less muscular and have thinner, less elastic walls.
Veins connect directly to the ventricles.
Veins only carry oxygen-rich blood.
Which process moves oxygen from the blood in capillaries into body cells, according to the notes?
Filtration
Active transport
Diffusion
Pumping
Select all exchanges that occur in capillaries as described.
Oxygen moves from blood to cells
Carbon dioxide moves from cells to blood
Nutrients move from blood to cells
Waste products move from cells to blood
Which statement best describes systemic circulation?
Blood flow between the heart and lungs
Blood flow from the heart to the body tissues and back to the heart
Blood flow within the chambers of the heart only
Exchange of gases inside the lungs without blood movement
Pulmonary circulation primarily involves which pathway?
From the body tissues to the heart and back to the tissues
From the heart to the lungs and back to the heart
Within the heart chambers only
From the lungs directly to body tissues without the heart
Cardiac circulation refers to blood flow that specifically supplies which area?
All body tissues excluding the heart
The lungs for oxygen exchange
The heart muscle itself via coronary vessels
Only the brain through carotid arteries
Select the circulations correctly matched with their primary destinations.
Systemic: heart muscle
Pulmonary: lungs
Cardiac: heart muscle
Systemic: body tissues
Which statement best defines hypertension as presented here?
A temporary rise in blood pressure after exercise
Persistently raised blood pressure in which the blood vessels have high pressure
Low blood pressure that occurs during sleep
Normal blood pressure of 120/80 mmHg measured at rest
Arteriosclerosis is described as a narrowing of the arteries. What mainly causes this narrowing?
Thickening of heart muscles
Fat deposits building up on artery walls
Loss of red blood cells
Excess water in the bloodstream
Which effect does arteriosclerosis have on blood flow according to the notes?
Blood flow speeds up to compensate
Blood flow slows down through narrowed arteries
Blood flow stops completely in all arteries
Blood flow moves only to veins
Select all statements that correctly describe stroke based on the material.
It is the loss of blood flow to part of the brain.
It is damage to brain tissue caused by blood clots or burst vessels.
It is a condition where the heart beats irregularly.
Its effects may be temporary or permanent.
Which measurement is given as normal blood pressure in the notes?
90/60 mmHg
100/70 mmHg
120/80 mmHg
140/90 mmHg
Which pair correctly matches an ailment to its main idea in the notes?
Hypertension — low blood pressure that varies
Arteriosclerosis — narrowing of arteries due to fat deposits
Stroke — stronger heartbeat to pump blood faster
Hypertension — blood flow to the brain is cut off
Which outcome is directly linked to hypertension in the notes?
Persistently raised blood pressure in the vessels
Immediate blockage of a coronary artery
Complete stoppage of blood flow to the brain
Decrease in blood pressure below normal
Which statement best defines anemia for grade-level understanding?
A condition where the number of red blood cells (RBC) or the hemoglobin concentration is lower than normal
A condition where the body makes too many platelets
A condition where the blood becomes thicker than normal
A condition where the heart pumps faster than normal
According to the notes, which are causes of anemia? Select all that apply.
Too much vitamin B12
Vitamin B12 deficiency
Blood loss
Low production or rapid destruction of red blood cells (RBC)
Which outcome is mentioned as a possible result of anemia?
May also lead to paralysis or weakness
Always causes fever
Always increases white blood cell count
Leads to stronger bones
Which statement best defines leukemia in the notes?
A cancer of blood due to overproduction of white blood cells (WBC) in the bone marrow
A disease caused by lack of hemoglobin in RBC
A disorder where platelets stop clotting blood
A condition of low red blood cell count only
Which is identified as the main cause of leukemia in the notes?
Overproduction of WBC in the bone marrow
Low production of RBC
Loss of platelets after injury
Too much iron in the blood
What treatment is noted for leukemia?
Blood transfusion
Vitamin C supplements
Regular exercise
Increased water intake
Which pair correctly matches the disorder with its key feature?
Anemia — lower than normal RBC or hemoglobin
Leukemia — deficiency of vitamin B12
Anemia — overproduction of WBC
Leukemia — rapid destruction of RBC
Which set lists only causes of anemia from the notes?
Vitamin B12 deficiency, blood loss, low production or rapid destruction of RBC
Overproduction of WBC, vitamin C deficiency, dehydration
Too much vitamin B12, excess platelets, high blood pressure
Bone fractures, muscle strain, high sodium diet
Which statement contrasts anemia and leukemia correctly?
Anemia involves low RBC or hemoglobin, while leukemia is cancer of blood with overproduction of WBC
Anemia is caused by too many WBC, while leukemia is caused by iron deficiency
Both anemia and leukemia are caused by dehydration
Leukemia always results from blood loss, while anemia always results from infections
Table salt, sugar, carbon dioxide, and sulfuric acid are examples of what?
elements
compounds
mixtures
solutions
Phosphorus, silver, iron, and helium are examples of what?
elements
compounds
miscible solutions
heterogeneous mixtures
Which statement describes a homogeneous mixture?
It has a uniform composition throughout.
Its components are visibly distinct.
It does not have a uniform composition.
It always separates into layers.
Which statement describes a heterogeneous mixture?
It has a uniform composition throughout.
It does not have a uniform composition throughout.
It is a pure substance.
It cannot be physically separated.
Which statements are true for both homogeneous and heterogeneous mixtures? Select all that apply.
They are mixtures of two or more substances.
They can be physically separated.
They are pure substances.
They always have uniform composition.
Which is a homogeneous mixture?
Salt dissolved in water
Sand mixed with water
Oil and water
A fruit salad
Which is a heterogeneous mixture?
Air
Sugar dissolved in tea
Granite
Brass
Choose the letter of the correct answer. Write your answers in CAPITAL. A pure substance that cannot be separated into simpler substances by chemical or physical means.
Mixture
Pure substance
Element
Compound
Choose the letter of the correct answer. Write your answers in CAPITAL. Pure substance may be homogeneous or heterogeneous.
True
False
Choose the letter of the correct answer. Write your answers in CAPITAL. A solution may be an element or a compound.
True
False
Daddy's morning hot black coffee
HOMOGENOUS MIXTURE
HETEROGENOUS MIXTURE
Ate's morning chocolate drink with marshmallows.
HOMOGENOUS MIXTURE
HETEROGENOUS MIXTURE
chicken noodle soup
HOMOGENOUS MIXTURE
HETEROGENOUS MIXTURE
What type of mixture is shown in the picture?
suspension
solution
homogeneous mixture
heterogeneous mixture
In a homogeneous mixture, you cannot identify the different substances mixed.
True
False
What type of mixture is dough?
homogeneous mixture
heterogeneous mixture
solution
colloid
In a heterogeneous mixture, the substances mixed can still be identified.
True
False
What type of mixture is this?
suspension
homogeneous mixture
colloid
heterogeneous mixture
Classify the item as SO for solution, CO for colloid, or SU for suspension: 70% isopropyl alcohol for disinfection.
SO
CO
SU
Classify the item as SO for solution, CO for colloid, or SU for suspension: strawberry ice cream.
SO
CO
SU
Classify the item as SO for solution, CO for colloid, or SU for suspension: type O blood for patient X.
SO
CO
SU
Classify the item as SO for solution, CO for colloid, or SU for suspension: soft drink and water.
SO
CO
SU
Classify the item as SO for solution, CO for colloid, or SU for suspension: black and yellow paint for a traffic sign.
SO
CO
SU
Classify the item as SO for solution, CO for colloid, or SU for suspension: whipped cream on top of your chocolate sundae.
SO
CO
SU
Classify the item as SO for solution, CO for colloid, or SU for suspension: spicy vinegar with red pepper flakes and garlic.
SO
CO
SU
Choose the correct category—SO for solution, CO for colloid, or SU for suspension—for this description: Appearance is clear and transparent.
SO
CO
SU
Choose the correct category—SO for solution, CO for colloid, or SU for suspension—for this description: No Tyndall effect and no sedimentation.
SO
CO
SU
Choose the correct category—SO for solution, CO for colloid, or SU for suspension—for this description: Appearance is cloudy with at least two substances visible or can be seen.
SO
CO
SU
Choose the correct category—SO for solution, CO for colloid, or SU for suspension—for this description: Tyndall effect is present.
SO
CO
SU
It makes a beam of light visible by lighting the particles.
Tyndall Effect
Solution
Solvent
Colloid
Element
Examples included jam, mayonnaise and hair spray.
Colloid
Solution
Solute
Element
Water
It is the substance to be dissolved.
Solute
Solvent
Heterogeneous mixture
Solution
Element
It is the one that does the dissolving.
Solvent
Solute
Water
Solution
Element
Is known as the universal solvent.
Water
Solution
Solute
Colloid
Element
Examples include alcohol, saline solution and cologne.
Solution
Heterogeneous mixture
Water
Solvent
Element
Sugar plus warm milk and mallows mixed together in a glass.
Heterogeneous mixture
Solution
Solute
Colloid
Element
Choose the mixture type that has a transparent appearance.
Solution
Suspension
Colloid
Choose the mixture type that has particle size less than 1 nm.
Solution
Suspension
Colloid
Choose the mixture type that shows visible sedimentation of particles at the bottom over time.
Solution
Suspension
Colloid
Choose the mixture type that shows a positive Tyndall effect (light scattering).
Solution
Suspension
Colloid
Choose the mixture type that matches the example sand plus water.
Solution
Suspension
Colloid
Women in the town use the current of air with a special kind of basket during harvest season to separate husk from grains. What is this technique called?
Winnowing
Hand picking
Sieving
Centrifugation
Aunt Glyn served dishes that are oily on her table. What can she do to separate the excess oil?
Decantation
Winnowing
Chromatography
Distillation
A pastry chef adds dry ingredients that are often clumped. Which separation technique is she performing to break apart the clumps?
Sieving
Hand picking
Centrifugation
Evaporation
Pangasinan and Occidental Mindoro mainly produce table salt. What separation technique is used to obtain salt from seawater?
Evaporation
Distillation
Chromatography
Decantation
Mark accidentally mixed insects and small stones with gathered grains. What technique should he use to remove the unwanted materials from the grains?
Hand picking
Chromatography
Distillation
Centrifugation
A blood sample needs its components separated in a laboratory for testing. Which separation technique is used?
Centrifugation
Evaporation
Winnowing
Sieving
Liquid turning to gas. Choose the correct term.
evaporation
condensation
filtration
distillation
Material that passed through a filter. Choose the correct term.
filtrate
residue
decantation
chromatography
Choose the method to separate sand from a salt mixture.
filtration
decantation
sieving
winnowing
Choose the method used to separate plasma and blood cells.
centrifugation
decantation
filtration
hand picking
Tongs, spoon, fork, and forceps are used for which process?
materials used to perform manual manipulation
materials used for decantation
equipment for distillation
tools for winnowing
Which material is used to filter impurities from water?
cheesecloth
colander
magnet
chromatography paper
Which process separates dry ingredients of different sizes?
sieving
winnowing
decantation
filtration
Which kitchen tool is a perforated bowl used for cooking and draining?
colander
cheesecloth
magnet
centrifuge
Which method separates sulfur powder from iron filings?
use of magnet
hand picking
sieving
chromatography
Which method uses wind and a special basket to separate mixtures?
winnowing
sieving
filtration
condensation
Which method separates liquids with different densities?
decantation
distillation
filtration
evaporation
Which laboratory technique is used to detect alcohol levels?
chromatography
decantation
winnowing
hand picking
Which organ acts as the human blood filter?
kidneys
heart
lungs
liver
Which process obtains pure water from sea water?
distillation
filtration
decantation
evaporation
Components of the Circulatory System (in any order). Select all that apply.
Heart
Blood vessels
Blood
Lungs
Kidneys
Components of Blood. Select all that apply.
Red blood cells
White blood cells
Platelets
Plasma
Lymph
Types of Blood Vessels. Select all that apply.
Arteries
Veins
Capillaries
Nerves
Comparing arteries vs. veins: Size of lumen. Which vessel has a larger lumen?
Arteries
Veins
Comparing arteries vs. veins: Wall thickness. Which vessel has thicker walls?
Arteries
Veins
Comparing arteries vs. veins: Blood pressure within. Which vessel carries blood under higher pressure?
Arteries
Veins
Comparing arteries vs. veins: Location in the body. Which vessel is typically located deeper within the body?
Arteries
Veins
Comparing arteries vs. veins: Type of blood passing through the vessel. Which vessel usually carries oxygenated blood?
Arteries
Veins
Comparing arteries vs. veins: Direction of blood flow. Which vessel carries blood toward the heart?
Arteries
Veins
