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NATIONAL SPORT SCHOOLST CLARE COLLEGE

HALF-YEARLY EXAMINATION – 2014/15

Level 5-6-7-8

FORM 2 INTEGRATED SCIENCE TIME: 1h 30min

Question 1 2 3 4 5 6 7 8 9 10 Global

MarkMax. Mark 9 11 10 12 9 10 10 8 11 10 100

Mark

DO NOT WRITE ABOVE THIS LINE

Name: __________________________________ Class: ___________

Instructions:

❑ Answer all questions.

________________________________________________________________________________________________National Sport School, St Clare College of 10

Mark

1. The pictures below show a variety of different snacks.

Crackers Cheese Ice-cream Apple

Fish Spaghetti Vegetable Salad

a. Choose two snacks which are rich in carbohydrates, from the above pictures.

_________________________ _________________________

(2 marks)

b. Why are proteins important in our diet?

__________________________________________________________________________

__________________________________________________________________________

(2 marks)

c. An athlete eats a plate of spaghetti before his training session. Suggest one reason why he does this.

__________________________________________________________________________

__________________________________________________________________________

(2 marks)

d. Give one important function of fats in our body. __________________________________

(1 mark)

e. Write down two food sources of:i. Iron. _________________________ _________________________

ii. Calcium. _________________________ _________________________(2 marks)


2. The Digestive System explains the process of how our body absorbs the nutrients it needs from food.

a. Complete the diagram above by labelling the main parts of the digestive system.

(6 marks)

b. Underline the correct answer:

i. Nutrients from food are absorbed in the blood through the (large intestine, small intestine, stomach).

ii. The stomach is protected from (Hydrochloric Acid, Citric Acid, Hydroxide Acid) by a layer of mucus.

iii. Food passes down from the mouth to the stomach through the (large intestine, small intestine, oesophagus).

iv. Water is absorbed into the body through the (small intestine, large intestine, anus) to form solid waste.

v. Faeces are excreted from the (gullet, anus, mouth).

(5 marks)________________________________________________________________________________________________National Sport School, St Clare College of 10

3. We are surrounded by different microbes, some of which can be harmful to our body.

a. The body can defend itself against these harmful microbes in different ways. Match the defence method to its correct description.

Defence Method Description

1 ScabKills the bacteria that enter the

stomach.

2 White Blood CellsFilters the microbes which are

spread in air.

3 Skin

Formed quickly on a wound to

prevent the microbes from

entering the blood.

4 Hair in Nostrils

The first defence method which

prevents most microbes from

entering the body.

5 Hydrochloric AcidNeutralises toxins which enter

the body.

(5 marks)

b. Diseases can be infectious or non-infectious.

i. What are the microbes that cause disease called? _________________________

(1 mark)ii. What does the term Infectious Disease mean?

__________________________________________________________________________

__________________________________________________________________________

(2 marks)

iii. Give two examples of infectious diseases, and the type of microbe that cause the disease. An example has been done for you.

Infectious Disease Type of Microbe

Influenza Virus

(2 marks)


4. This question is about Elements and Compounds.

a. Write down the names of the elements which have the following symbol.

i. H _________________________

ii. Na _________________________

iii. Mg _________________________

(3 marks)

b. Complete the following chemical equations.

i. Carbon + ____________________ → Carbon Dioxide

ii. Sodium + Chlorine → ____________________

iii. ____________________ + ____________________ → Iron Oxide

(4 marks)

c. The following diagrams show the atoms of Hydrogen and Oxygen.

○ Atoms of Oxygen

● Atoms of Hydrogen

i. Which diagram shows pure Oxygen? _____

ii. Which diagram shows a mixture of Hydrogen and Oxygen? _____

iii. Which diagram shows a compound of Hydrogen and Oxygen? _____

(3 marks)

d. What is the difference between an element and a compound?__________________________________________________________________________

__________________________________________________________________________

(2 marks)


Diagram A Diagram DDiagram CDiagram B

5. Our eye is the organ which helps us observe the environment around us.

a. Label the eye diagram below, using the words from the following list.

cornea optical nerve retina lens pupil

(5 marks)

b. Complete the following sentence:

i. When a person enters a dark room, the pupil _________________________.

ii. The retina is the screen on which __________________________________.

iii. The optical nerve is responsible for sending messages to the _____________.

iv. Eyelashes protect the eyes from ___________________________________.

(4 marks)

6. The following question is about Light and Sound.

a. Lightning and thunder occur at the same time, but we see the flash of lightning before we hear the sound of thunder. Why?

__________________________________________________________________________

__________________________________________________________________________

(1 mark)

b. Where does sound travel faster: through gas, liquids or solids? Explain.

__________________________________________________________________________

__________________________________________________________________________


c. In a movie scene, astronauts are shown to be hearing noises coming from planet Earth. Explain why this movie is scientifically wrong.

__________________________________________________________________________

__________________________________________________________________________

(2 marks)

d. Label the following ear diagram, using the words in the list below.

Auditory Nerve, Three Small Bones, Cochlea, Ear Drum, Ear Canal

(5 marks)

7. Chemical Changes result in the formation of new materials.

a. The following table shows a variety of Physical and Chemical Changes. Tick the correct column (√) to show whether the changes are Physical or Chemical Changes.

Physical Change Chemical Changei. Sugar dissolving in water.ii. Water droplets forming on glass.iii. Boiling broccoli.iv. Putting water in a freezer to make ice.v. Lighting a Bunsen Burner.vi. Burning pizza in an oven.vii. Green copper carbonate powder turning

into black copper oxide after exposing it to high temperatures.

viii. Bending an iron bar by heating it.(8 marks)

b. Are chemical changes reversible or irreversible reactions? Explain why.

__________________________________________________________________________

__________________________________________________________________________


8. This question is about Separation Techniques.

a. For each of the mixture or solution mentioned below, identify the best method to separate the materials, choosing from the list below.

Filtration Evaporation By Hand Chromatography Using a Magnet

Mixture or Solution Separation Technique

i. Sand and Water

ii. Blue Marbles and Yellow Beads

iii. Salt and Water

iv. Steel Bolts and Plastic Rings

v. Blue Ink and Purple Ink

(5 marks)

b. Joseph uses the following apparatus to separate Soil from Water. Look at the diagram and

answer the following questions.

i. What is the letter which represents the Filtrate? _________________________

ii. What is the name of the apparatus labelled C? _________________________

iii. What is the name of the apparatus labelled D? _________________________


9. This question is about different atoms, elements and compounds.

a. The picture shows an ancient golden goblet.

i. Circle the word that better describes Gold:

Compound Element Solution Mixture

(1 mark)

ii. Make a list of three properties of Metals.

____________________________________________________________________

____________________________________________________________________

____________________________________________________________________

(3 marks)

iii. Circle a Non-Metal from the list of words below:

Magnesium Aluminium Carbon Silver(1 mark)

b. Fill in the blanks, choosing words from the following list. Each word can be used once, more than once or not at all.

Water Elements Compound Metal Non-Metal Mixture Molecule Atoms

i. ____________________ are the smallest building blocks of matter.

ii. ____________________ have only one type of atom.

iii. Mercury is an example of a ____________________.

iv. Two or more atoms are called a ____________________.

v. Hydrogen is an example of a ____________________.

vi. Water is made up of two different elements. It is an example of a ____________________.


10. This question is about Solutions.

a. Maria spilled some nail polish on her dressing table. She tries to remove it, by soaking it with water but her attempt failed. Then, she wipes the spilled nail polish with ethanol and she was successful in removing it.

i. Underline the correct answer: Ethanol is a suitable (solution, solute, solvent) for the nail polish.

(1 mark)

ii. Explain why Maria could not remove the nail polish by using water.

__________________________________________________________________________

__________________________________________________________________________

(2 marks)

b. Match the correct term, with the corresponding explanation.

Term Explanation

1 Soluble Does not dissolve.

2 Insoluble The substances in which the solute dissolves.

3 Solvent Dissolves.

(3 marks)

c. Different substances take different amounts of time, to dissolve.

i. Write down two factors which increase the rate of dissolving.

____________________________________________________________________

____________________________________________________________________

(2 marks)

iii. Give one example of a Soluble substance in water. ________________________(1 mark)

iv. Give one example of an Insoluble substance in water. ________________________(1 mark)

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