IGCSE Sciences - Co-Ordinated (0973) — October–November 2024, Paper 11

Which characteristic of living organisms is described by the removal of metabolic waste products from the body?\nA excretion\nB nutrition\nC reproduction\nD respiration

Onion cells are placed in a concentrated glucose solution. Which statement describes what happens?\nA The cells will become turgid as water enters by osmosis.\nB The cells will…

Which food test and result correctly indicates the presence of starch?\nA biuret test — colour change to purple\nB Benedict's test — colour change to brick red\nC iodine solution…

Food is stored at 4 °C to slow down spoilage. Which statement explains why this prevents spoilage?\nA Enzymes in microorganisms work more slowly at lower temperatures.\nB…

Fig. 1 shows a cross-section of a dicotyledonous leaf. Which letter labels the upper epidermis?\nA lower epidermis\nB mesophyll\nC upper epidermis\nD waxy cuticle\n\n[Fig. 1:…

What is the main dietary importance of fibre?\nA It provides energy for active processes.\nB It provides the body with amino acids.\nC It helps food move through the intestine.\nD…

Selexipag is a drug that widens the pulmonary artery. Which effect does this have?\nA It decreases the rate of breathing.\nB It decreases the blood pressure in the pulmonary…

Which processes use energy from respiration?\n1 active transport\n2 digestion\n3 growth\n4 osmosis\nA 1 and 3 only\nB 1 and 4 only\nC 2 and 3 only\nD 2 and 4 only

In a reflex arc, what is the correct order for an impulse to travel?\nA motor neurone → relay neurone → sensory neurone\nB motor neurone → sensory neurone → relay neurone\nC relay…

During fertilisation in a flowering plant, through which structure does a pollen nucleus pass?\nA anther\nB ovule\nC petal\nD style

In humans, the allele for normal skin colour (A) is dominant over the allele for albinism (a). Two parents who are both carriers for albinism have children. What is the…

A student observes animals eating in a field. Beetles eat leaves. Mice eat beetles. An owl eats mice.\nWhich food chain correctly shows this information?\nA beetles → leaves →…

In the carbon cycle, which process is represented by X where CO₂ is removed from the atmosphere by plants?\nA combustion\nB decomposition\nC photosynthesis\nD respiration

A student wants to investigate the reaction between magnesium and hydrochloric acid. Which apparatus is most suitable for this investigation?\nA a beaker\nB a boiling tube\nC a…

Which statement correctly describes sea water?\nA It is a compound of sodium and chlorine.\nB It is a mixture that has a fixed boiling point.\nC It is a mixture that contains…

Which diagram shows the correct dot-and-cross diagram for a water molecule?\nA H₂O with two O–H covalent bonds shown correctly\nB H₂O with ionic bonds\nC H₂O with three bonds\nD…

Which compound is formed from carbon and hydrogen only and has 4 hydrogen atoms for each carbon atom?\nA C₂H₄\nB C₂H₆\nC C₃H₆\nD CH₄

Which products are formed at each electrode during the electrolysis of concentrated sodium chloride solution?\nA chlorine at cathode, hydrogen at anode\nB chlorine at anode,…

The table shows information about two reactions, W and Z.\n\n reaction temperature change \n ---------- ------------------- \n W increases \n Z decreases \n\nWhich row correctly…

Which change would decrease the rate of reaction between calcium carbonate chips and dilute hydrochloric acid?\nA Use powdered calcium carbonate instead of chips.\nB Use a larger…

Which statement about oxidation is correct?\nA Oxidation is the loss of electrons.\nB Oxidation is the gain of electrons.\nC Oxidation always involves oxygen.\nD Oxidation always…

Which oxide is acidic?\nA CaO\nB CO₂\nC CuO\nD Na₂O

Compound P gives a red colour in a flame test and produces a white precipitate with silver nitrate solution. Which compound is P?\nA calcium chloride\nB lithium chloride\nC…

Which property is NOT a typical property of transition elements?\nA They form coloured compounds.\nB They can exist in variable oxidation states.\nC They are good catalysts.\nD…

The table shows the reactions of four metals with water and dilute acid.\n\n metal reaction with cold water reaction with dilute acid \n ------- --------------------------…

Blue cobalt(II) chloride paper turns pink when placed in a substance. What does this indicate?\nA The substance contains an acid.\nB The substance contains carbon dioxide.\nC The…

What are the products of the complete combustion of ethanol?\nA carbon and water\nB carbon monoxide and water\nC carbon dioxide and water\nD carbon dioxide and hydrogen

A car travels 270 m in 100 s. What is the average speed of the car?\nA 0.37 m/s\nB 2.7 m/s\nC 27 m/s\nD 270 m/s

A skydiver has a weight of 800 N. Air resistance acting on the skydiver is 400 N. What is the resultant force on the skydiver?\nA 400 N downwards\nB 400 N upwards\nC 800 N…

A ball is thrown upwards and then falls back down. At which point does the ball have the greatest kinetic energy?\nA at the highest point\nB just before it hits the ground\nC when…

Which quantities are needed to calculate the power output of a motor?\nA force and distance\nB force, distance and time\nC mass and velocity\nD mass, velocity and time

Which material is a poor thermal conductor?\nA air\nB aluminium\nC copper\nD steel

A ray of light passes through a parallel-sided glass block. What happens to the direction of the ray when it exits the glass?\nA The ray bends towards the normal.\nB The ray bends…

Which type of electromagnetic wave has the lowest frequency?\nA gamma rays\nB infrared\nC microwaves\nD radio waves

Object P is positively charged. Object Q is brought near to P and is attracted. Which statement about Q is correct?\nA Q must be negatively charged.\nB Q could be negatively…

A lamp has a resistance of 60 Ω and a potential difference of 3 V across it. What is the current in the lamp?\nA 0.005 A\nB 0.05 A\nC 0.5 A\nD 5 A

Two resistors are connected in parallel in a circuit. A third resistor is then added in parallel. What happens to the total resistance and the total current from the battery?\nA…

A long straight wire carries a current directed into the page. What is the direction of the magnetic field at a point directly above the wire?\nA downwards\nB to the left\nC to…

Which statement about isotopes is correct?\nA Isotopes of an element have the same mass number but different atomic numbers.\nB Isotopes of an element have the same number of…

Fig. 1 shows the radioactive decay of a sample. What is the half-life of the sample?\nA 1.0 years\nB 2.0 years\nC 3.0 years\nD 4.0 years\n\n[Fig. 1: A graph showing the count rate…