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What are the 3 layers of the Earth? - Answer *Crust* Thinnest layer (varies from a few km thick up to 80km) Lighter elements present here (magnesium, silica, aluminum) *Mantle* The thickest layer (2900km thick) Made up of the lithosphere, the asthenosphere and the inner mantle *Outer Core* Liquid The Gutenberg discontinuity is the boundary between the mantle and the outer core *Inner Core* Solid Most dense layer (about 1200km thick) containing iron and nickel What 2 l...

1a. Define 'Human rights'. - Answer Basic rights and freedoms inherent to all human beings, to which all people are entitled without discrimination. 1a. Define 'Human rights norms'. - Answer Established customary behavior based on moral principles and ways of living inculcated into the culture of a country or area over a long period of time. 1a. Define 'Intervention'. - Answer Actions of a state, group of states or international organizations in a foreig...

How important is water to human life on Earth? - Answer Vital, animals for chemical reactions, plants for photosynthesis, clouds reflect 20% of solar radiation Uses of water for humans - Answer Respiration, metabolic reactions, bathing, recreation, domestic and industrial use Use of water for flora - Answer Photosynthesis, transpiration Uses of water for fauna - Answer Respiration, metabolic reactions, bathing How important is carbon to life on earth? - Answer...

Ablation - Answer The loss of ice and snow especially from a glacier through melting evaporation and sublimation Absolute humidity - Answer The mass of water vapour in a given volume of air Abstraction - Answer The extraction of water from rivers and boreholes for public water supply Abyssal plain - Answer The deepest part of the ocean covering vast areas of ocean floor submarine mountain chains and trenches interrupt the relatively flat plain Accumulation - A...

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1) Which of the following terms describes the body's ability to maintain its normal state? (A) Anabolism (B) Catabolism (C) Tolerance (D) Homeostasis (E) Metabolism - Answer 1) D (Homeostasis) 2) Each of the following is known to help prevent infection EXCEPT (A) hair in the nose (B) mucous membranes (C) osteoblasts (D) saliva (E) tears - Answer 2) C (osteoblasts) 3) Each of the following mature cells has a nucleus EXCEPT (A) lymphocyte (B) monocyte (C) ...

What are the muscles responsible for movement at the shoulder? - Answer anterior deltoid, posterior deltoid, medial deltoid, latissimus dorsi, teres minor, pectoral major What 6 movements does the hip perform? - Answer flexion, extension, abduction, adduction, medial rotation, lateral rotation What happens when the iliopsoas contracts? - Answer flexion at the hip What happens when the gluteus maximus contract? - Answer extension at the hip What happens when th...

four basic functions of the skeleton: - Answer support, protection, movement and storage. two parts of the bone: - Answer the epiphysis - the end and the diaphysis - the centre. types of joint: - Answer fibrous - immoveable, cartilagenous - partially moveable and synovial - freely moveable. cartilagenous joins occur where the connection between the bones is made up of _____________ - Answer cartilage. synovial capsules - Answer a fibrous sac with an inne...

Sinoartial (SA) Node - Answer Small mass of cardiac muscle found in the wall of the right atrium that generates the heartbeat. Atrioventricular (AV) node - Answer This node relays the impulse between the upper and lower sections of the heart. Systole - Answer When the heart contracts. Bundle of His - Answer A collection of heart muscle cells that transmit electrical impulses from the AVN to the ventricles. Purkinje fibres - Answer Muscle fibres that co...

fitness - Answer the ability to cope with the demands made during an individual day to day life cardiac output - Answer The volume of blood pumped out from the hearts left ventricles in one minute. stroke volume x heart rate stroke volume - Answer the volume of blood pumped by the left ventricle in each contraction heart rate - Answer number of beats per minute bradycardia - Answer resting heart rate below 60bpm venous return - Answer the volume...

health - Answer A state of complete physical, mental, and social well-being, and not merely the absence of disease or infirmity fitness - Answer the ability to meet/cope with the demands of the environment structure of the heart - Answer atrium - smaller ventricles - thicker muscular walls septum left side bigger - pump to body

Agonist - Answer Muscle that contracts and creates movement Antagonist - Answer Opposes the agonist providing a resistance for coordinated movement Fixator - Answer Stabilizes one part of the body while another causes movement Isotonic muscular contraction - Answer A type of muscular contraction where the muscle changes length under tension Concentric contraction - Answer Muscle shortens producing tension Eccentric contraction - Answer When a mu...

What two factors change heart rate? - Answer Neural control mechanism and hormonal control mechanism What are chemoreceptors? - Answer Detect an increase in blood CO2 levels What are baroreceptors? - Answer Detect increase in blood pressure What are proprioceptors? - Answer Detect increase in muscle movement How does the neural control mechanism work? - Answer Chemoreceptors, baroreceptors and proprioceptors detect change. This sends a signal to the card...

Minute ventilation - Answer Minute ventilation= TV x respiratory rate Lung volumes graph - Answer how does exercise affect IRV? - Answer decreases how does exercise affect residual volume? - Answer remains the same Describe the process of gas exchange which occurs at a muscle. - Answer -Oxygen diffuses from the capillary to the muscle cells and carbon dioxide diffuses from the muscle cells to the capillary -Oxygen / carbon dioxide moves from areas of ...

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Three objects are located in the xy-plane as shown in the figure. If mA=2.0 kg, mB=3.0kg, and mC=5.0 kg, what is the center of mass of the three-object system? - Answer (7.8, 5.2) A rope is attached to a crate at an angle to the horizontal, as shown on the left. The rope pulls the crate to the right across a rough horizontal surface at a constant speed. The free-body diagram on the right shows the forces exerted on the crate at the instant shown on the left. As the crate moves across th...

An object is thrown with an initial speed v near the surface of Earth. Assume that air resistance is negligible and the gravitational field is constant. If the object is thrown vertically upward, the direction and magnitude of its acceleration while it is in the air is A) upward and decreasing B) upward and constant C) downward and decreasing D) downward and increasing E) downward and constant - Answer E) downward and constant An object is thrown with an initial speed v near the...

Newton's 1st Law - Answer An object at rest stays at rest and an object in motion stays in constant motion (with the same speed and in the same direction) unless acted upon by an unbalanced/external force. Newton's 2nd Law - Answer Acceleration is produced when a force acts on a mass. The greater the mass (of the object being accelerated) the greater the amount of force needed (to accelerate the object). Newton's 3rd Law - Answer For every action, there is an equ...

SI unit of length - Answer Meter SI unit of mass - Answer Kilogram SI unit of time - Answer Second Displacement - Answer (x or y) the change in position. Δx or Δy (vector) (answers the question how far is the distance between the final and initial point) Unit: m (has a direction associated with it) Distance - Answer (x or y) the total change in position. (answers the question, how far in total did __ move?) Unit: m Velocity - Answer ...

What two entities comprise a vector? - Answer Magnitude and direction What do you do with any vector that is not on either the x or y axis? - Answer Break it up into x and y components using trig, add up the components. How are velocity and speed different? - Answer Velocity has a direction and speed does not have direction. What quantity is calculated from slope of the displacement versus time graph? - Answer velocity What does upward slope on a displacement ...