OCR Combined Science B Papers 4 and 8 Automock

#1. If a car is moving but the forces are balanced – what will happen to the speed of the car?

will decelerate

will stay constant

will accelerate

#2. Why are metals good conductors?

The atoms in metals are much closer together than non-metals and the electrons are able to jump the small distance between electron shells

Electrons in metals have a 2- charge, giving them more available charge for conducting electricity

Electrons in the outermost shell of metals are free to move

#3. What are the units we use for measuring energy?

#4. Where does blood from the aorta travel to?

The rest of the body

The lungs

#5. Fresh water contains many different contaminants and so must be cleaned before it becomes potable. Which is the correct treatment path?

water from source --> chlorine added --> filtration tower --> sedimentation tank --> storage --> water pumped to homes

water from source --> filtration tower --> chlorine added --> water pumped to homes

water from source --> sedimentation tank --> filtration tower --> chlorine added --> storage --> water pumped to homes

#6. With electromagnetism the direction of the current depends on which of the following?

The resistance of the wire x the current

The strength of the current

The direction of the current

#7. What is the role of the inferior vena cava?

Sending blood towards the upper body

Bringing blood to the heart from the upper body

Sending blood towards the lower body

Bringing blood to the heart from the lower body

#8. True or false – Precipitation reactions can be either exothermic or endothermic.

True

False

#9. Copper can be purified using electrolysis of copper sulfate solution. For this process we use the setup in the image below. Complete the half equation for the reaction at the cathode. Cu²⁺ + 2e →

Cu

SO₄²⁻

CuO

#10. Lead has 4 stable isotopes. ²⁰⁴Pb (abundance – 1.4%), ²⁰⁵Pb (abundance – 24.1%), ²⁰⁷Pb (abundance – 22.1%) and ²⁰⁸Pb (abundance – 52.4%). Calculate the Aᵣ of lead. Answer to 2 decimal places.

#11. Is this a parallel or series circuit?

Series

Parallel

#12. In transverse waves are the vibrations parallel or at right angles to the direction of wave travel?

parallel

right angles

#13. The male gametes (sperm cells) are adapted to their function. Which of the following are adaptations of sperm cells?

Select all that apply:

they have lots of mitochondia

they have a flagellum

they are diploid

they have an acrosome

they are haploid

they have lots of chloroplasts

#14. What is frequency?

how far from the equilibrium point the wave has oscillated

the maximum displacement of a wave

the number of waves passing a point each second

the distance of one entire oscillation

the time taken for a full oscillation

#15. True or false – You cannot use physical processes to separate mixtures into different substances.

True

False

#16. What is the chemical symbol for iodine?

#17. What is the cell wall made from in plants?

#18. Which of the following features are found in arteries?

Narrow lumen (inside diameter of tube)

One cell thick walls

Thin flexible walls

Thick elastic walls of muscle fibres

Wide lumen (inside diameter of tube)

#19. During a neutralisation reaction which salt is formed from hydrochloric acid?

sulfate

carbonate

chloride

nitrate

borate

#20. Solutions of more than pH 7 are?

acidic

alkaline

neutral

#21. What is the name of the phase change from liquid to gas?

evaporation/boiling

melting

condensation

sublimation

freezing

deposition

#22. What are abiotic factors?

Factors which affect the ability of scientists to sample the environment - leading to errors in measurements

Biological environmental factors which affect the distribution and abundance of organisms

Physical and chemical environmental factors which affect the distribution and abundance of organisms

#23. Fill in the blanks: Electrolysis is a process in which ………. energy from a ………. current supply is used to decompose electrolytes.

Electrical, Alternating

Thermal, Indirect

Thermal, Direct

Electrical, Direct

#24. Complete the equation: HCl (aq) → H⁺(aq) + …..

Cl⁻(s)

Cl⁻(aq)

Cl⁻(l)

#25. Why do simple molecules not conduct electricity?

All simple molecules are in the gaseous state and so electrons are too far apart to transfer a charge

Simple molecules do not have an overall charge, making them unable to carry a charge and conduct electricity.

Simple molecules are aligned in the direction opposite to the flow of current. This means that they oppose the flow of electricity.

#26. Paper chromatography is used to separate which types of materials?

separating soluble compounds

separate different types of liquids

separate soluble materials from insoluble materials

#27. Calcium nitrate contains the polyatomic ion NO₃⁻ (nitrate) and calcium. How many nitrate ions will be needed to make one molecule of calcium nitrate?

2

3

1

#28. True or false – A concentration gradient is a term used to explain how the moon moves in the night sky?

true

false

#29. Why can humans only survive a few days without water?

without water our mouths become too dry to speak

water allows us to swallow our food

most of our body is made of water and it is continually lost to the environment

#30. Do non-metals usually have a high or low melting point?

Low

High

#31. Complete the following equation describing a reaction with a metal carbonate and an acid: metal carbonate + acid → …. + …. + ….

Select all that apply:

oxygen

salt

ozone

carbon dioxide

water

#32. What is the chemical symbol for chlorine?

#33. Why do historical measurements by humans of global temperature have some uncertainty?

Select all that apply:

Instruments to measure temperature were not very accurate in the past and have gained more resolution over time

Early scientists were in competition to record the highest temperatures

The longest continuous record of temperature is only available in one place

#34. Which part of the heart separates the two sides?

The septum

The inferior vena cava

The pulmonary artery

The superior vena cava

#35. Complete the equation used to calculate population size: population size = ………….. x total size of it habitat / total area of quadrats

population size = number of organisms in all quadrats x total size of habitat / total area of quadrats

population size = number of organisms in one quadrat x total size of habitat / total area of quadrats

population size = number of organisms in all quadrats x total size of community / total area of quadrats

#36. A student sets up a series circuit that has two filament lamps, a power source and a switch after the first lamp. Can the first lamp be turned off whilst keeping the second lamp on?

Yes

No

#37. Hydrogen has two stable isotopes, ¹H (abundance – 99.972%) and ²H (abundance – 0.001%). Calculate the Aᵣ of hydrogen. Answer to 3 decimal places.

#38. Through which process would air in a space station move if someone opened a door to space?

active transport

osmosis

diffusion

#39. No refraction takes place if a wave is travelling along which line?

#40. What is this component?

#41. Relative atomic mass used to have a different name. What was that name?

Molecular molar mass

Relative formula mass

Atomic weight

#42. What is an electrical fault?

When the live wire touches a metal part (casing) of an appliance or plug

When an appliance breaks down and need to be repaired

When a fuse has reached its expiry and needs to be replaced

#43. Determine the speed of the object between 1 and 3 seconds. ? answer to 2 decimal places

#44. When using inert electrodes to perform electrolysis with copper chloride solution, which products will be produced at the anode and cathode?

Cathode: Copper (Cu) Anode: Chlorine (Cl₂)

Cathode: Hydrogen (H₂) Anode: Chlorine (Cl₂)

Cathode: Copper (Cu) Anode: Hydrogen (H₂)

Cathode: Copper (Cu) Anode: Chlorine (OH⁻)

#45. Which of these are common properties of giant covalent materials?

Do not conduct electricity

Low melting/boiling points

Conduct electricity

High melting/boiling points

Soluble in water

Insoluble in water

#46. What is a battery?

two or more cells in a circuit

provides a constant resistance

makes or breaks a circuit

#47. Is solar power renewable?

no

partially

yes

#48. What type of substance is pure gold (Au)?

Element

Compound

Mixture

#49. Why do plants need oxygen?

Plants need oxygen to process urea

Plants need oxygen to build their cell walls

Plants also do aerobic respiration - to get energy from glucose

#50. What is a solution called when it contains the maximum amount of solute that can dissolve in a solvent at a particular temperature?

dilute

saturated

flaccid

#51. Increases in thyroxine concentration in the blood cause a decrease in the amount of thyroxine released. What kind of feedback mechanism is this?

Negative feedback

Postive feedback

#52. What is the part of the heart that the arrows are pointing to?

The pulmonary vein

The coronary artery

The aorta

The inferior vena cava

The coronary vein

#53. What is the equation for Rf values in paper chromatography?

distance moved by spot / distance moved by solvent

distance moved by solvent x distance moved by spot

distance moved by solvent / distance moved by spot

#54. What is this component?

#55. What is a beta particle?

an electron

high frequency electromagnetic radiation

two protons and two neutrons but no electrons

two neutrons without any protons

#56. What is the role of the central nervous system (CNS)?

detect impulses

interpret impulses and coordinate responses

convert impulses into actions

#57. Which of the following describe the composition of a pure substance?

Select all that apply:

Is the same in all parts of the substance - can only be an element

Is the same in all parts of the substance - can be either an element or a compound

is the not the same in all parts of the substance

#58. Which type of factor is competition?

Sub-biotic

Biotic

Abiotic

Inbiotic

#59. Motor neurones carry impulses to which part of the nervous system?

CNS

CFS

effectors

#60. Why is the rate of an enzyme controlled reaction lower at lower temperatures?

at low temperatures enyzmes close up their active sites and do not accept substrates

at low temperatures enzymes and substrates are moving slowly and are less likely to meet

#61. Which type of factor is predation?

Biotic

Sub-biotic

Abiotic

Inbiotic

#62. Why is magnesium a better electrical conductor than sodium?

Group 1 sodium is less electrically conductive because it quickly forms impurities that prevent efficient conduction

Group 2 magnesium has two spare electrons to donate to the delocalised pool, whereas, sodium atoms only have one electron to donate. This means there are more electrons to carry the charge

#63. Magnets can attract magnetic materials – true or false?

false

true

#64. What is the resolution of electron microscopes limited by?

the wavelength of infrared light

the magnification x width of the eyepiece

the wavelength of electrons

#65. What is the function of a diode?

makes or breaks a circuit

provides a constant resistance

measures potential difference

releases light

measures current

provides variable resistance

allows current to only flow one way

safety component which can break a faulty circuit

two or more cells in a circuit

gives power to a circuit

#66. Using the kinetic energy equation – calculate the kinetic energy of a car with a mass of 1200kg travelling at 10 m/s. Include units. ? If you do not remember the kinetic energy equation it is listed below the quiz.

#67. Which of these processes allows saltwater to become potable?

filtration

distillation

precipitation

#68. Which factors does the angle of refraction depend on?

Select all that apply:

Change in wave speed

Angle of incidence

Angle of emergence

#69. This image shows Flemming’s Left Hand Rule. Which of the following answers are the correct interpretations of the rule? ? Select three answers, one for each finger

The middle finger shows the direction of the force

The thumb shows the direction of the force

The index finger shows the direction of the magnetic field

The index finger shows the direction of the current

The middle finger shows the direction of the current

The thumb shows the direction of the magnetic field

#70. Is nuclear fusion renewable?

partially

yes but not currently feasible

no

#71. What is the longest wavelength of electromagnetic radiation

microwaves

radiowaves

ultraviolet light

visible light

infrared

x-rays

gamma rays

#72. Which of these describes the term “rate of reaction”?

The rate of temperature change in the surroundings

The number of particles involved in a reaction in 1 minute

The speed at which reactants are turned into products

#73. Are voltmeters connected in parallel or series?

Series

Parallel

#74. Cells are adapted to perform a specific function. Why do cells in the pancreas have lots of ribosomes?

the pancreas has no function in modern humans

digestive enzymes are made in the pancreas

the pancreatic cells need lots of energy

#75. Are most light waves visible to the human eye?

Yes - most of the are visible

Different wavelengths of light such as microwaves can be seen by humans in certain conditions

No - most of them are invisible

GCSE OCR Combined Science B Papers 1 and 5

Results

#1. If a car is moving but the forces are balanced – what will happen to the speed of the car?

#2. Why are metals good conductors?

#3. What are the units we use for measuring energy?

#4. Where does blood from the aorta travel to?

#5. Fresh water contains many different contaminants and so must be cleaned before it becomes potable. Which is the correct treatment path?

#6. With electromagnetism the direction of the current depends on which of the following?

#7. What is the role of the inferior vena cava?

#8. True or false – Precipitation reactions can be either exothermic or endothermic.

#9. Copper can be purified using electrolysis of copper sulfate solution. For this process we use the setup in the image below. Complete the half equation for the reaction at the cathode. Cu²⁺ + 2e →

#10. Lead has 4 stable isotopes. ²⁰⁴Pb (abundance – 1.4%), ²⁰⁵Pb (abundance – 24.1%), ²⁰⁷Pb (abundance – 22.1%) and ²⁰⁸Pb (abundance – 52.4%). Calculate the Aᵣ of lead. Answer to 2 decimal places.

#11. Is this a parallel or series circuit?

#12. In transverse waves are the vibrations parallel or at right angles to the direction of wave travel?

#13. The male gametes (sperm cells) are adapted to their function. Which of the following are adaptations of sperm cells?

#14. What is frequency?

#15. True or false – You cannot use physical processes to separate mixtures into different substances.

#16. What is the chemical symbol for iodine?

#17. What is the cell wall made from in plants?

#18. Which of the following features are found in arteries?

#19. During a neutralisation reaction which salt is formed from hydrochloric acid?

#20. Solutions of more than pH 7 are?

#21. What is the name of the phase change from liquid to gas?

#22. What are abiotic factors?

#23. Fill in the blanks: Electrolysis is a process in which ………. energy from a ………. current supply is used to decompose electrolytes.

#24. Complete the equation: HCl (aq) → H⁺(aq) + …..

#25. Why do simple molecules not conduct electricity?

#26. Paper chromatography is used to separate which types of materials?

#27. Calcium nitrate contains the polyatomic ion NO₃⁻ (nitrate) and calcium. How many nitrate ions will be needed to make one molecule of calcium nitrate?

#28. True or false – A concentration gradient is a term used to explain how the moon moves in the night sky?

#29. Why can humans only survive a few days without water?

#30. Do non-metals usually have a high or low melting point?

#31. Complete the following equation describing a reaction with a metal carbonate and an acid: metal carbonate + acid → …. + …. + ….

#32. What is the chemical symbol for chlorine?

#33. Why do historical measurements by humans of global temperature have some uncertainty?

#34. Which part of the heart separates the two sides?

#35. Complete the equation used to calculate population size: population size = ………….. x total size of it habitat / total area of quadrats

#36. A student sets up a series circuit that has two filament lamps, a power source and a switch after the first lamp. Can the first lamp be turned off whilst keeping the second lamp on?

#37. Hydrogen has two stable isotopes, ¹H (abundance – 99.972%) and ²H (abundance – 0.001%). Calculate the Aᵣ of hydrogen. Answer to 3 decimal places.

#38. Through which process would air in a space station move if someone opened a door to space?

#39. No refraction takes place if a wave is travelling along which line?

#40. What is this component?

#41. Relative atomic mass used to have a different name. What was that name?

#42. What is an electrical fault?

#43. Determine the speed of the object between 1 and 3 seconds. ? answer to 2 decimal places

#44. When using inert electrodes to perform electrolysis with copper chloride solution, which products will be produced at the anode and cathode?

#45. Which of these are common properties of giant covalent materials?

#46. What is a battery?

#47. Is solar power renewable?

#48. What type of substance is pure gold (Au)?

#49. Why do plants need oxygen?

#50. What is a solution called when it contains the maximum amount of solute that can dissolve in a solvent at a particular temperature?

#51. Increases in thyroxine concentration in the blood cause a decrease in the amount of thyroxine released. What kind of feedback mechanism is this?

#52. What is the part of the heart that the arrows are pointing to?

#53. What is the equation for Rf values in paper chromatography?

#54. What is this component?

#55. What is a beta particle?

#56. What is the role of the central nervous system (CNS)?

#57. Which of the following describe the composition of a pure substance?

#58. Which type of factor is competition?

#59. Motor neurones carry impulses to which part of the nervous system?

#60. Why is the rate of an enzyme controlled reaction lower at lower temperatures?

#61. Which type of factor is predation?

#62. Why is magnesium a better electrical conductor than sodium?

#63. Magnets can attract magnetic materials – true or false?

#64. What is the resolution of electron microscopes limited by?

#65. What is the function of a diode?

#66. Using the kinetic energy equation – calculate the kinetic energy of a car with a mass of 1200kg travelling at 10 m/s. Include units. ? If you do not remember the kinetic energy equation it is listed below the quiz.

#67. Which of these processes allows saltwater to become potable?

#68. Which factors does the angle of refraction depend on?

#69. This image shows Flemming’s Left Hand Rule. Which of the following answers are the correct interpretations of the rule? ? Select three answers, one for each finger

#70. Is nuclear fusion renewable?

#71. What is the longest wavelength of electromagnetic radiation

#72. Which of these describes the term “rate of reaction”?

#73. Are voltmeters connected in parallel or series?

#74. Cells are adapted to perform a specific function. Why do cells in the pancreas have lots of ribosomes?

#75. Are most light waves visible to the human eye?

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