Subjects

Subjects

More

Search

Subjects

/

Biology

/

Organisation

/

Plant organisation

/

Scientific calculations - investigating transpiration

GCSE Biology Higher Tier Paper 1H May 2020 + Mark Schemes & Past Papers

View

GCSE Biology Higher Tier Paper 1H May 2020 + Mark Schemes & Past Papers
user profile picture

laila

@la1la

·

8 Followers

Follow

The GCSE Biology Higher Tier Paper 1H from Tuesday 12 May 2020 covers key topics in biology, including osmosis experiments with potatoes and digestion. The exam paper tests students' knowledge of scientific methods, data analysis, and biological concepts.

Key points:

  • Includes questions on osmosis experiments using potato samples
  • Covers digestion, enzymes, and absorption in the digestive system
  • Tests data interpretation and graphing skills
  • Requires understanding of microscopy techniques
  • Assesses knowledge of blood vessels and cell structures

13/08/2023

1312

AQA Please write clearly in block capitals. Centre number Surname Forename(s) Candidate signature I declare this is my own work. GCSE COMBIN

Page 1: Exam Information and Instructions

This page provides essential details about the AQA Combined Science: Trilogy Biology Paper 1 exam for the Higher Tier. The exam is scheduled for Tuesday 12 May 2020 in the afternoon, with a duration of 1 hour and 15 minutes. Students are instructed to use black ink or black ball-point pen, with pencils only for drawing. The maximum mark for the paper is 70, and students are expected to use a calculator where appropriate.

Highlight: The exam is part of the GCSE Combined Science: Trilogy qualification, focusing on Biology Paper 1 for the Higher Tier.

Definition: Higher Tier refers to the more challenging level of GCSE exams, typically aimed at students targeting grades 5-9.

The page also includes spaces for students to fill in their personal information, including center number, candidate number, surname, and forename(s). Students are required to declare that the work is their own by signing the candidate signature box.

Vocabulary: GCSE stands for General Certificate of Secondary Education, the main qualification taken by 14-16 year olds in England, Wales, and Northern Ireland.

AQA Please write clearly in block capitals. Centre number Surname Forename(s) Candidate signature I declare this is my own work. GCSE COMBIN

View

Page 6: Digestion and Absorption

This page shifts focus to the digestive system, specifically the digestion of starch into sugar molecules. Students are asked two questions:

  1. The name of the enzyme that digests starch (correct answer: amylase)
  2. Where most food molecules are absorbed (correct answer: small intestine)

Vocabulary: Amylase is a digestive enzyme that breaks down complex carbohydrates like starch into simpler sugars.

Definition: Digestion is the process of breaking down food into smaller molecules that can be absorbed by the body.

These questions test students' knowledge of digestive enzymes and the structure and function of the digestive system, which are key topics in Biology Paper 1 topics.

AQA Please write clearly in block capitals. Centre number Surname Forename(s) Candidate signature I declare this is my own work. GCSE COMBIN

View

Page 5: Percentage Change Calculation

This page revisits Table 1 from the potato osmosis experiment and introduces a calculation for percentage change in mass. Students are provided with the equation:

percentage change in mass = (change in mass / mass of potato at start) × 100

Example: For the potato in 0.2 mol/dm³ sugar solution: Initial mass: 7.96g Change in mass: 0.25g Percentage change = (0.25 / 7.96) × 100 = 3.14%

Students are asked to calculate the percentage change in mass for the potato in 0.2 mol/dm³ sugar solution and give the answer to 3 significant figures.

Highlight: Calculating percentage change is a common task in GCSE Biology Higher Tier questions and answers.

This question tests students' ability to extract relevant data from a table, apply a given equation, and present the result with the correct number of significant figures.

AQA Please write clearly in block capitals. Centre number Surname Forename(s) Candidate signature I declare this is my own work. GCSE COMBIN

View

Page 2: Osmosis Experiment with Potato

This page introduces a student investigation on the effect of different sugar solution concentrations on potato pieces. The experiment method is outlined in six steps, including cutting potato pieces, recording their initial mass, placing them in various sugar solutions, and measuring the mass change after 24 hours.

Example: The experiment steps include:

  1. Cut five pieces of potato
  2. Record the starting mass of each piece
  3. Place each piece in a different concentration of sugar solution
  4. After 24 hours, remove the pieces from the solutions
  5. Record the final mass of each piece
  6. Calculate the change in mass for each piece

The first question asks students to identify the independent variable in the experiment.

Definition: The independent variable is the factor that is changed or manipulated in an experiment to test its effect on the dependent variable.

Highlight: Understanding variables is crucial in scientific experiments and data analysis for GCSE Biology exam questions and answers.

AQA Please write clearly in block capitals. Centre number Surname Forename(s) Candidate signature I declare this is my own work. GCSE COMBIN

View

Page 7: Villi and Microscopy

This page introduces a diagram (Figure 2) showing two villi and a close-up view of a cell on the surface of a villus as seen under an electron microscope.

Definition: Villi are tiny, finger-like projections that line the small intestine, increasing its surface area for absorption.

Students are asked to give one advantage of using an electron microscope compared to a light microscope.

Highlight: Understanding different types of microscopy and their applications is important for AQA Biology past papers.

The correct answer should mention the higher resolution or greater magnification provided by electron microscopes, allowing for the observation of smaller structures like microvilli.

AQA Please write clearly in block capitals. Centre number Surname Forename(s) Candidate signature I declare this is my own work. GCSE COMBIN

View

Page 8: Blood Vessels and Magnification

This page continues with Figure 2, asking students to identify the type of blood vessel labeled X (correct answer: capillary). It then presents a magnification calculation problem.

Definition: Capillaries are the smallest blood vessels in the body, where exchange of substances between blood and tissues occurs.

Students are given the real length of a villus (0.8 mm) and asked to calculate its image length when viewed at a magnification of x20. The equation provided is:

magnification = size of image / size of real object

Example: Given magnification = 20 and real size = 0.8 mm 20 = image size / 0.8 mm Image size = 20 × 0.8 mm = 16 mm

This question tests students' ability to rearrange and use equations, an important skill for GCSE Biology Paper 1 2024 and beyond.

AQA Please write clearly in block capitals. Centre number Surname Forename(s) Candidate signature I declare this is my own work. GCSE COMBIN

View

Page 4: Graphing and Data Interpretation

This page focuses on graphing skills and data interpretation related to the potato osmosis experiment. Students are required to complete Figure 1 by plotting the remaining data points from Table 1 and drawing a line of best fit through all points.

Vocabulary: Line of best fit is a straight or curved line that best represents the general trend of a set of data points on a scatter plot.

The graph shows the relationship between sugar solution concentration and change in potato mass. Students are then asked to determine the concentration of sugar solution inside the potato cells using the completed graph.

Highlight: Graphing and interpreting data are essential skills for Biology Paper 1 past papers and exams.

The question introduces the concept that the mass of a potato piece doesn't change when the concentration of the solution inside the cells equals the concentration outside. This point on the graph (where the line crosses the x-axis) represents the internal concentration of the potato cells.

AQA Please write clearly in block capitals. Centre number Surname Forename(s) Candidate signature I declare this is my own work. GCSE COMBIN

View

Page 3: Data Analysis and Osmosis Explanation

This page presents Table 1, which shows the results of the potato osmosis experiment. The table includes data on sugar solution concentrations, initial and final potato masses, and the change in mass for each sample.

Example: For a sugar solution concentration of 0.0 mol/dm³, the initial potato mass was 7.94g, the final mass after 24 hours was 10.14g, resulting in a mass change of 2.20g.

Students are asked to explain why the potato in 0.0 mol/dm³ sugar solution increased in mass. This question tests understanding of osmosis principles.

Definition: Osmosis is the movement of water molecules from an area of high water concentration to an area of low water concentration across a partially permeable membrane.

Highlight: Explaining osmosis is a key skill for AQA GCSE Biology past papers and exams.

The correct explanation involves understanding that water moves into the potato cells from the pure water solution due to the concentration gradient, causing the potato to increase in mass.

AQA Please write clearly in block capitals. Centre number Surname Forename(s) Candidate signature I declare this is my own work. GCSE COMBIN

View

AQA Please write clearly in block capitals. Centre number Surname Forename(s) Candidate signature I declare this is my own work. GCSE COMBIN

View

Similar content

Know AQA November 2021 Biology Paper 1 (Higher) thumbnail

114

2758

11/9

AQA November 2021 Biology Paper 1 (Higher)

This a past paper from November Higher Tier Biology Mark Scheme: https://files.cognitoedu.org/files/3%20-%20GCSE/1%20-%20Past%20Papers/5%20-%20Combined%20Science/1%20-%20AQA%20[EB]/1%20-%20Higher%20[HF]/AQA-GCSE-Combined-Science-Biology-Higher-November-2

Know knowledge organiser thumbnail

161

1615

10/11

knowledge organiser

Learn how to improve your memory retention by using different cognitive skills and techniques.

Know GCSE Double Award Science Biology Osmosis notes thumbnail

9

247

11/12

GCSE Double Award Science Biology Osmosis notes

notes on osmosis covering the whole spec

Know plant + animal cells / organ systems thumbnail

11

42

7

plant + animal cells / organ systems

basically just mind maps and notes

Know specialised cells thumbnail

13

145

10

specialised cells

sperm cells, nerve cells, muscle cells, root hair cells & phloem and xylem cells

Know Plant cell specialisation thumbnail

13

128

Plant cell specialisation

Cell biology- plant cell specialisation

Can't find what you're looking for? Explore other subjects.

Knowunity is the #1 education app in five European countries

Knowunity has been named a featured story on Apple and has regularly topped the app store charts in the education category in Germany, Italy, Poland, Switzerland, and the United Kingdom. Join Knowunity today and help millions of students around the world.

Ranked #1 Education App

Download in

Google Play

Download in

App Store

Knowunity is the #1 education app in five European countries

4.9+

Average app rating

13 M

Pupils love Knowunity

#1

In education app charts in 12 countries

950 K+

Students have uploaded notes

Still not convinced? See what other students are saying...

iOS User

I love this app so much, I also use it daily. I recommend Knowunity to everyone!!! I went from a D to an A with it :D

Philip, iOS User

The app is very simple and well designed. So far I have always found everything I was looking for :D

Lena, iOS user

I love this app ❤️ I actually use it every time I study.

Subjects

/

Biology

/

Organisation

/

Plant organisation

/

Scientific calculations - investigating transpiration

GCSE Biology Higher Tier Paper 1H May 2020 + Mark Schemes & Past Papers

user profile picture

laila

@la1la

·

8 Followers

Follow

The GCSE Biology Higher Tier Paper 1H from Tuesday 12 May 2020 covers key topics in biology, including osmosis experiments with potatoes and digestion. The exam paper tests students' knowledge of scientific methods, data analysis, and biological concepts.

Key points:

  • Includes questions on osmosis experiments using potato samples
  • Covers digestion, enzymes, and absorption in the digestive system
  • Tests data interpretation and graphing skills
  • Requires understanding of microscopy techniques
  • Assesses knowledge of blood vessels and cell structures

13/08/2023

1312

 

10/11

 

Biology

31

AQA Please write clearly in block capitals. Centre number Surname Forename(s) Candidate signature I declare this is my own work. GCSE COMBIN

Page 1: Exam Information and Instructions

This page provides essential details about the AQA Combined Science: Trilogy Biology Paper 1 exam for the Higher Tier. The exam is scheduled for Tuesday 12 May 2020 in the afternoon, with a duration of 1 hour and 15 minutes. Students are instructed to use black ink or black ball-point pen, with pencils only for drawing. The maximum mark for the paper is 70, and students are expected to use a calculator where appropriate.

Highlight: The exam is part of the GCSE Combined Science: Trilogy qualification, focusing on Biology Paper 1 for the Higher Tier.

Definition: Higher Tier refers to the more challenging level of GCSE exams, typically aimed at students targeting grades 5-9.

The page also includes spaces for students to fill in their personal information, including center number, candidate number, surname, and forename(s). Students are required to declare that the work is their own by signing the candidate signature box.

Vocabulary: GCSE stands for General Certificate of Secondary Education, the main qualification taken by 14-16 year olds in England, Wales, and Northern Ireland.

AQA Please write clearly in block capitals. Centre number Surname Forename(s) Candidate signature I declare this is my own work. GCSE COMBIN

Page 6: Digestion and Absorption

This page shifts focus to the digestive system, specifically the digestion of starch into sugar molecules. Students are asked two questions:

  1. The name of the enzyme that digests starch (correct answer: amylase)
  2. Where most food molecules are absorbed (correct answer: small intestine)

Vocabulary: Amylase is a digestive enzyme that breaks down complex carbohydrates like starch into simpler sugars.

Definition: Digestion is the process of breaking down food into smaller molecules that can be absorbed by the body.

These questions test students' knowledge of digestive enzymes and the structure and function of the digestive system, which are key topics in Biology Paper 1 topics.

AQA Please write clearly in block capitals. Centre number Surname Forename(s) Candidate signature I declare this is my own work. GCSE COMBIN

Page 5: Percentage Change Calculation

This page revisits Table 1 from the potato osmosis experiment and introduces a calculation for percentage change in mass. Students are provided with the equation:

percentage change in mass = (change in mass / mass of potato at start) × 100

Example: For the potato in 0.2 mol/dm³ sugar solution: Initial mass: 7.96g Change in mass: 0.25g Percentage change = (0.25 / 7.96) × 100 = 3.14%

Students are asked to calculate the percentage change in mass for the potato in 0.2 mol/dm³ sugar solution and give the answer to 3 significant figures.

Highlight: Calculating percentage change is a common task in GCSE Biology Higher Tier questions and answers.

This question tests students' ability to extract relevant data from a table, apply a given equation, and present the result with the correct number of significant figures.

AQA Please write clearly in block capitals. Centre number Surname Forename(s) Candidate signature I declare this is my own work. GCSE COMBIN

Page 2: Osmosis Experiment with Potato

This page introduces a student investigation on the effect of different sugar solution concentrations on potato pieces. The experiment method is outlined in six steps, including cutting potato pieces, recording their initial mass, placing them in various sugar solutions, and measuring the mass change after 24 hours.

Example: The experiment steps include:

  1. Cut five pieces of potato
  2. Record the starting mass of each piece
  3. Place each piece in a different concentration of sugar solution
  4. After 24 hours, remove the pieces from the solutions
  5. Record the final mass of each piece
  6. Calculate the change in mass for each piece

The first question asks students to identify the independent variable in the experiment.

Definition: The independent variable is the factor that is changed or manipulated in an experiment to test its effect on the dependent variable.

Highlight: Understanding variables is crucial in scientific experiments and data analysis for GCSE Biology exam questions and answers.

AQA Please write clearly in block capitals. Centre number Surname Forename(s) Candidate signature I declare this is my own work. GCSE COMBIN

Page 7: Villi and Microscopy

This page introduces a diagram (Figure 2) showing two villi and a close-up view of a cell on the surface of a villus as seen under an electron microscope.

Definition: Villi are tiny, finger-like projections that line the small intestine, increasing its surface area for absorption.

Students are asked to give one advantage of using an electron microscope compared to a light microscope.

Highlight: Understanding different types of microscopy and their applications is important for AQA Biology past papers.

The correct answer should mention the higher resolution or greater magnification provided by electron microscopes, allowing for the observation of smaller structures like microvilli.

AQA Please write clearly in block capitals. Centre number Surname Forename(s) Candidate signature I declare this is my own work. GCSE COMBIN

Page 8: Blood Vessels and Magnification

This page continues with Figure 2, asking students to identify the type of blood vessel labeled X (correct answer: capillary). It then presents a magnification calculation problem.

Definition: Capillaries are the smallest blood vessels in the body, where exchange of substances between blood and tissues occurs.

Students are given the real length of a villus (0.8 mm) and asked to calculate its image length when viewed at a magnification of x20. The equation provided is:

magnification = size of image / size of real object

Example: Given magnification = 20 and real size = 0.8 mm 20 = image size / 0.8 mm Image size = 20 × 0.8 mm = 16 mm

This question tests students' ability to rearrange and use equations, an important skill for GCSE Biology Paper 1 2024 and beyond.

AQA Please write clearly in block capitals. Centre number Surname Forename(s) Candidate signature I declare this is my own work. GCSE COMBIN

Page 4: Graphing and Data Interpretation

This page focuses on graphing skills and data interpretation related to the potato osmosis experiment. Students are required to complete Figure 1 by plotting the remaining data points from Table 1 and drawing a line of best fit through all points.

Vocabulary: Line of best fit is a straight or curved line that best represents the general trend of a set of data points on a scatter plot.

The graph shows the relationship between sugar solution concentration and change in potato mass. Students are then asked to determine the concentration of sugar solution inside the potato cells using the completed graph.

Highlight: Graphing and interpreting data are essential skills for Biology Paper 1 past papers and exams.

The question introduces the concept that the mass of a potato piece doesn't change when the concentration of the solution inside the cells equals the concentration outside. This point on the graph (where the line crosses the x-axis) represents the internal concentration of the potato cells.

AQA Please write clearly in block capitals. Centre number Surname Forename(s) Candidate signature I declare this is my own work. GCSE COMBIN

Page 3: Data Analysis and Osmosis Explanation

This page presents Table 1, which shows the results of the potato osmosis experiment. The table includes data on sugar solution concentrations, initial and final potato masses, and the change in mass for each sample.

Example: For a sugar solution concentration of 0.0 mol/dm³, the initial potato mass was 7.94g, the final mass after 24 hours was 10.14g, resulting in a mass change of 2.20g.

Students are asked to explain why the potato in 0.0 mol/dm³ sugar solution increased in mass. This question tests understanding of osmosis principles.

Definition: Osmosis is the movement of water molecules from an area of high water concentration to an area of low water concentration across a partially permeable membrane.

Highlight: Explaining osmosis is a key skill for AQA GCSE Biology past papers and exams.

The correct explanation involves understanding that water moves into the potato cells from the pure water solution due to the concentration gradient, causing the potato to increase in mass.

AQA Please write clearly in block capitals. Centre number Surname Forename(s) Candidate signature I declare this is my own work. GCSE COMBIN
AQA Please write clearly in block capitals. Centre number Surname Forename(s) Candidate signature I declare this is my own work. GCSE COMBIN

Similar content

Biology - AQA November 2021 Biology Paper 1 (Higher)

This a past paper from November Higher Tier Biology Mark Scheme: https://files.cognitoedu.org/files/3%20-%20GCSE/1%20-%20Past%20Papers/5%20-%20Combined%20Science/1%20-%20AQA%20[EB]/1%20-%20Higher%20[HF]/AQA-GCSE-Combined-Science-Biology-Higher-November-2

114

2758

1

Know AQA November 2021 Biology Paper 1 (Higher) thumbnail

Biology - knowledge organiser

Learn how to improve your memory retention by using different cognitive skills and techniques.

161

1615

2

Know knowledge organiser thumbnail

Biology - GCSE Double Award Science Biology Osmosis notes

notes on osmosis covering the whole spec

9

247

1

Know GCSE Double Award Science Biology Osmosis notes thumbnail

Biology - plant + animal cells / organ systems

basically just mind maps and notes

11

42

0

Know plant + animal cells / organ systems thumbnail

Biology - specialised cells

sperm cells, nerve cells, muscle cells, root hair cells & phloem and xylem cells

13

145

0

Know specialised cells thumbnail

Biology - Plant cell specialisation

Cell biology- plant cell specialisation

13

128

1

Know Plant cell specialisation thumbnail

Can't find what you're looking for? Explore other subjects.

Knowunity is the #1 education app in five European countries

Knowunity has been named a featured story on Apple and has regularly topped the app store charts in the education category in Germany, Italy, Poland, Switzerland, and the United Kingdom. Join Knowunity today and help millions of students around the world.

Ranked #1 Education App

Download in

Google Play

Download in

App Store

Knowunity is the #1 education app in five European countries

4.9+

Average app rating

13 M

Pupils love Knowunity

#1

In education app charts in 12 countries

950 K+

Students have uploaded notes

Still not convinced? See what other students are saying...

iOS User

I love this app so much, I also use it daily. I recommend Knowunity to everyone!!! I went from a D to an A with it :D

Philip, iOS User

The app is very simple and well designed. So far I have always found everything I was looking for :D

Lena, iOS user

I love this app ❤️ I actually use it every time I study.