2011 sec 1 Flashcards by Mars xt

What is the name for the reproduction by an animal that is still in the pre-adult form?

Ans: Paedogenesis

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The formation of fruit without prior fertilization of flower by pollen is known as what?

Ans: Parthenocarpy

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What is the formula for ferricyanide ion?

Ans: Fe(CN)63-

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What is the formula for the metaplumbate ion?

Ans: PbO32-

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Find the energy consumed when four 75 watts bulbs are left on for 8 hours.

Ans: 2.4 kWh

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A battery of 40 volts is connected to a series of arrangement of 5 ohms

3 ohms

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Which mammal has a scientific name ‘Panthera Pardus’?

Ans: leopard

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Which animal has the scientific name ‘Canis Lupus’?

Ans: Grey Wolf

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What two chemical elements are found in Sphalerite?

Ans: Zinc and Sulphur

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Periclase is composed of what two elements?

Ans: Magnesium and Oxygen

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Which physicist studied light and colour and was known for his double-slit experiment that demonstrated the wave nature of light?

Ans: Thomas Young

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Which physicist co-discovered that the intensity of a magnetic field set up by a current flowing through a wire varies inversely with the distance from the wire?

Ans: Jean-Baptiste Biot

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How many chambers are there in an amphibian’s heart?

Ans: Three(3) Chambers

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How many chambers sre there in a fish’s heart?

Ans: Two(2) Chambers

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What is the pH of a solution that is one thousand(1000) times more acidic than pure water?

Ans: Four(4)

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What is the approximate molar concentration of pure water?

Ans: Fifty Five(55) moles per cubic metre

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What is the name of the process in which electrons are ejected from a surface by illuminating it with electromagnetic radiation?

Ans: Photo-Electric Effect

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What is the name of the process in which electrons are given off from a heated metal surface?

Ans: Thermionic Emission

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what is the scientific name for scotch bonnet pepper?

Ans: capsicum chancy

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what is the scientific name for star apple?

Chrysophyllum Canskkddk

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Cryolite is used to lower the melting point of alumina in the Haul-Herault process. What is the formula for crinoline?

Ans: Na3AlF6

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in the electronic form of copper from its impure form impure copper is used as which type of electrode?

Ans: Anode

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An electric lamp is marked 60W 240V. What is the resistance of the filament when it is working?

Ans: 960 ohms

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An electric lamp is marked 80W 320V. What current should it take?

Ans: 0.25 A

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What is the sum of all an organism's genetic information including DNA called?

Ans: Genome

In genetics what occurs when there is a change in the sequence of nucleotide bases in a piece of DNA?

Ans: Mutation

Which of the following elements can form the greatest number of covalent bonds: Nitrogen oxygen or sulfur?

Ans: Sulfur

Which of the following elements forms a tetrahedral structure: Silicon Beryllium or boron?

Ans: Silicon

Which Polish Mathematician Philosopher and Astronomer was the first to postulate that the earth revolves around the sun

Which 17th century Physicist is known for discovering gravity while watching an apple fall to the ground?

Ans: Isaac Newton

which branch of Bio deals with the effects of lower than normally preferred temperatures on living beings?

Ans: cryoBio

Which branch of Bio deals with the study and practical application of preparation use and effects of drugs and synthetic medicines?

Ans: pharmacology

when sulphur dioxide dissolves in water what is formed?

Ans: sulphuric acid

What are the products when sodium chloride reacts with sulphuric acid?

Ans: sodium sulphate and HCl

Which physicist used the telescope to see the Earth’s moon discovered Jupiter’s moons and discovered sunspots?

Ans:Galileo Galilei

Which physicist is famous for using his cathode ray tube experiment to discover electrons?

Ans: J.J Thomson

Which fruit tree has the scientific name Cocos nucifera?

Ans: coconut

Which fruit has the scientific name Chrysophyllum cainito?

Ans: Star Apple

What is the colour of sodium chromate in alkaline solution?

Ans: Yellow

When copper (II) chloride is added to fireworks what colour is given off?

Ans: green

Assuming that g is equal to 10ms-2 what is the momentum of an object if its mass is 30kg and it falls from rest for 10s?

Ans: 3000kgms-1

What is the force acting on an object of mass 10kg moving with a velocity of 7ms-1?

Ans: 0N

What is the gestation period of a hippopotamus?

Ans: 8 months

What is the gestation period of an elephant?

Ans: 21-22 months

What is the name of the main chemical process used in Industry to extract Alumina from Bauxite?

Ans: Bayer Process

What metal is used as a reducing agent to obtain Iron from Iron Oxide in the Thermite process?

Ans: Aluminium

Which specific blood vessel takes blood from the kidneys to the inferior vena cava?

Ans: Renal vein

Which specific blood vessel takes blood from the head to the superior vena cava?

Ans: Jugular vein

What is the name of a heterogeneous mixture in which solute-like particles do not settle out?

Ans: Colloid

What is the name for a colloidal suspension of a liquid in a liquid?

Ans: Emulsion

What is the name for the technique for finding the direction and distance of an object by analyzing its reflection of microwave?

Ans: Radar Phys

What is the name of the system that uses Ultra Sonic waves travelling through water instead of radio waves to detect submarines and under water obstacles?

Ans: SONAR

What general name is given to an external body that protrudes from an organism’s body?

Ans: appendage

What general name is given to one of the long hair-like parts on the anterior region of an organism which is used as a sense organ?

Ans: Antenna

What is the term for the concentration expressed as the number of moles of solute per kilogram of solvent?

Ans: Molality

Which element alters the rate of chemical reaction in the Haber process?

Ans: Iron

What term is used to describe the generation of voltage across a conductor when it moves through a magnetic field?

Ans: Electromagnetic induction

What term is used to describe the magnetism produced in a material when it is placed in a magnetic field?

Ans: induced magnetism

Which animal has the scientific name Rodentia Muridae?

Ans: mouse

Which animal has the scientific name Leporidae Cuniculas?

Ans: Rabbit

What is the volume of a gas at STP?

Ans: 22.4 dm3

What is the temperature and pressure at STP?

Ans: O°C and 1 atm

What name is given to the vessel that can be tightly sealed so that high temperatures and pressures can be produced inside it?

Ans: Autoclave

What name is given to a device that collects electromagnetic radiation by using a concave reflecting surface to focus the rays unto a detector?

Ans: dish Arial

Phalanges is the scientific name for which bones in humans?

Ans: fingers

Patella is the scientific name for which specific part of the human body?

Ans: knee cap

When Calcium reacts with cold water what is formed?

Ans: Calcium Hydroxide and Hydrogen gas

What are the main ingredients in the chemical marketed under the trade name alcacester?

Ans: Citric acid and Sodium Bicarbonate

A force of 30N is applied when a force of 450N is applied to what area?

Ans: 15m2

Find in Pascals the pressure exerted when a force of 360N is applied to an area of 18m2

. Ans: 20 Pa

Which specific part of the human brain is responsible for the consolidation of short term into long term memory and is also responsible for spatial navigation?

Ans: Hippocampus

Which specific part of the human brain is the relay station which passes most of the signals from sense organs unto other parts of the brain for processing?

Ans: the Thalamus

What is the name that scientists give to the effect observed when light is scattered by colloidal particles?

Ans: The Tyndall effect

What term connected with soap making refers to the hydrolysis of esters in the presence of strong alkalis?

Ans: Saponification

Modern Physicists hold that protons neutrons and other hadrons are made up of which fundamental particles?

Ans: quarks

Which scientist was the first person to demonstrate that a falling body picks up speed as it descends?

Ans: Galileo

This specific part of the male body is derived from a Latin phrase which literally means carrying away vessel name it

. Ans: vas deferens or ductus deferens

What is another name for the Pharyngeal Tonsil or Nasal Pharyngeal Tonsil?

Ans: Adenoids

What is the chemical name for the liquid commonly referred to as oil of winter green?

Ans: Methyl Salicylate

What is the chemical formula for the once popular refrigerant Freon?

Ans: C-Cl2-F2

What is the potential difference across a resistor if the energy required to transmit 12 Coulombs through it is 1656J?

Ans: 138V

A 100kῼ resistor has a potential difference of 10V across it how much charge is being transferred every 100 milliseconds?

Ans: 10µC

What method of producing offspring in organisms requires only one parent?

Ans: Asexual reproduction

What is the term used to depict the fusion of gametes in sexual reproduction?

Ans: fertilization

Which element is positioned immediately above aluminium in group 13 of the periodic table?

Ans: Boron

Which element is positioned immediately to the left of magnesium in period 3 of the periodic table?

Ans: Sodium

An electric lamp is marked 60W, 240V, what is the resistance of the filament when it is working?

Ans: 960 ohms

An electric lamp is marked 60W, 300V, what current should it take?

Ans: 0.2A

What is the common name for the part of the body which is also known as the vermix?

Ans: Appendix

In milimeters what is the average diameter of the appendix in a normal human being?

Ans: 7 to 8 milimeters

What is the specific name for a substance that conducts electricity poorly in a dilute aqueous solution?

Ans: Weak electrolyte

What term is used to describe the occurrence of alternating double and single bonds in organic molecules?

Ans: Conjugation

How much work is done when a force of 20.5N moves a distance of 12m?

Ans: 246J

A body of mass 23kg moves with an acceleration of 3.5m/s2. What is the force acting on the body?

Ans: 80.5 N

2011 sec 1 Flashcards

(94 cards)