Parent/Carer Comment

Staff Comment

GCSE level

Target

Science Home Learning Task

Year 9

GCSE – Organisation and the digestive system

Name

Tutor Group

Teacher

Given out: Monday 12 June

Hand in: Monday 19 June

Investigating science

Welcome to your science homework booklet. This booklet is designed to give

you some extra practise on the key areas in Biology Paper 1, the

“organisation and digestive system” section of the GCSE course.

All sets need to carry out tasks 1-5 giving as full answers as possible.

Set 1 needs to carry out task 6 – optional task for all other sets.

Each question has been given a GCSE level to show the level you are

working at.

Don’t forget to fill in the last page and ask a parent/carer to sign the box on

the front.

TASK 1- Tissues and organs

1. a) Complete the diagram using the words in the box below to show the levels of

organisation from the smallest to the largest (level 3-4).

b) What is the definition of a tissue? Can you name any tissues? (level 4-5).

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Organ Organ system Cell Organism Tissue

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c) What is the definition of an organ? Can you name any organs? (level 4-5).

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d) What is the definition of an organ system? Can you name any organ systems?

(level 4-5).

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2. Match each item on the left with its grouping on the right by drawing lines

between them (level 3-4)

Kidney

Glandular

Muscle

Digestive system

Cell

Tissue

Organ

Organ system

TASK 2 – The digestive system

Answer the questions below about the human digestive system.

1. What is the role of the human digestive system? (level 4-5).

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2. The stomach, large intestine, liver and small intestine are important parts of

the human digestive system. Write down the role of each of these parts in the

space provided (level 5-6).

Stomach

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Liver

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Small intestine

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Large intestine

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3. Label the diagram of the human digestive system below. Use the names in the

box for the labels (level 3-4).

Pancreas Mouth Gullet Liver

Small intestine Stomach

Appendix Large intestine Anus

Salivary glands Gall bladder

4. The small intestine contains structures known as villi. Why does the small

intestine contain these? What are they for? (level 5-6).

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TASK 3 – The chemistry of food

1. Carbohydrates, proteins and lipids (fats) are important parts of a healthy diet.

Complete the table below to show what they are needed for and examples of

foods that they are found in (level 4-5).

Component Why we need it in our

diet

Foods they are found in

Carbohydrates

Proteins

Lipids

2. Foods can be tested to find out if they contain carbohydrates, proteins and lipids.

Describe the method you would use to test for each food component and the

change in the reagent used for a positive result (level 4-6).

Carbohydrates

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Proteins

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Lipids

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TASK 4 – Enzymes

1. What two things do enzymes do in our body? (level 4-5).

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2. How do enzymes work? In the space below draw an enzyme and its substrate.

Then draw or write down how the enzyme and substrate link together – hint:

lock and key theory (level 4-7).

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3. This question is about enzymes involved in digestion.

a) Which enzyme is involved in the digestion of carbohydrates? (level 4).

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Where is this enzyme made in the body? (level 4).

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What is made when this enzyme breaks down carbohydrates? (level 4).

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b) Which enzyme is involved in the digestion of proteins? (level 4).

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Where is this enzyme made in the body? (level 4).

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What is made when this enzyme breaks down proteins? (level 4).

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c) Which enzyme is involved in the digestion of lipids (fats)? (level 4).

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Where is this enzyme made in the body? (level 4).

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What is made when this enzyme breaks down lipids? (level 4).

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TASK 5 – Factors affecting enzymes

1. Enzymes in our body are designed to work under certain temperature and pH

conditions.

a) What temperature are the enzymes designed to work at in the human body?

(level 4).

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b) The graph below shows how the activity of an enzyme changes with

temperature.

i)

ii)

iii)

iv)

v)

vi)

vii)

viii)

ix)

x)

xi)

xii)

xiii)

xiv)

i) What is happening at the point labelled X on the diagram? What is this

point called? (level 5-6).

X

Y

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ii) What has happened to the enzyme at the point labelled Y on the diagram?

Explain why this has happened (level 5-6).

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2. The graph below shows information on two enzymes involved in digestion in the

human body.

a) What pH does each enzyme work best at? (level 4).

Salivary amylase _____________________

Pepsin _____________________

b) Why do you think they work best at different pH levels? Hint: think about where

you would find them in the body (level 5-6).

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c) What would happen to the salivary amylase if it went into the stomach? Explain

your answer (level 5-6).

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TASK 6 – Six-mark question (level 5-8).

The six-mark question is a long-answer question designed to test your knowledge

about a topic and your writing skills. Answer the question below on the space

underneath.

In this question you will be assessed on using good English, organising information clearly and using specialist terms where appropriate.

Describe the passage of a meal containing bread through your digestive

system. Include everything that will happen to the bread as it passes

through the digestive system.

Plan your six-mark answer here.

Additional planning space

You could add a diagram to help with your answer.

TASK 6 – continued

Write your six-mark answer in the space below.

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Self Evaluation of my Homework

I am a R____________________ learner. I know this because:

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I believe that my effort and attitude to learning for this booklet is a:

1 2 3 4

I know this because:

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