GRADE 7 NATURAL SCIENCE MID-YEAR EXAMINATION 8 June …

1 |Grade 7 Natural Sciences Mid-Year Examination 2015 UHS

NAME TEACHER’S COMMENT

TEACHER

CLASS PARENT’S COMMENT

MARK

PERCENTAGE PARENT’S SIGNATURE

HERZLIA MIDDLE SCHOOL

GRADE 7

NATURAL SCIENCE MID-YEAR EXAMINATION

8 June 2015

TIME: 90 Minutes

MARKS: 140


INSTRUCTIONS

1. There are 20 pages including a cover page and one Answer Sheet. Make sure you have all of them.

2. Answer all questions on the paper in blue or black ink.

3. Read each question carefully before answering it.

4. Pay attention to the mark allocation.

5. Plan your time carefully.

6. All diagrams should be done in pencil and labelled in blue or black ink.

7. Write neatly and legibly.

8. Use the Multiple Choice answer sheet for question 1.

9. Write in full sentences. No one word answer will be accepted.

10. Do not use colour, highlighters or shading in bar graphs.


MULTIPLE CHOICE ANSWER SHEET

NAME: ______________________________ CLASS: _____

Multiple Choice (use pencil only)

Choose the answer, which you consider most appropriate and cross the corresponding letter on this Answer Sheet.

E.g. If your answer to 1.3 is D, indicate your choice like this:

1.3 A B C D

If more than one cross appears in any line, the answer will be marked wrong.

1.1 A B C D

1.2 A B C D

1.3 A B C D

1.4 A B C D

1.5 A B C D

1.6 A B C D

1.7 A B C D

1.8 A B C D

1.9 A B C D

1.10 A B C D


SECTION A: SHORT QUESTIONS 40 (LIFE & LIVING and MATTER & MATERIALS)

QUESTION 1 MULTIPLE CHOICE [20]

Four options are provided as possible answers to the following questions.

Each question has only ONE correct answer. Cross the letter (A–D) next to the

question number (1.1–1.10) on the ANSWER SHEET.

1.1 If you heat a liquid like water that is at room temperature the… (2)

A temperature of the liquid increases

B temperature of the liquid decreases

C temperature of the liquid remains the same

D liquid freezes

1.2 What do you notice about the temperature of water when its starts boiling? (2)

A Temperature of water increases

B Temperature of water decreases

C Temperature of water remains the same

D The temperature increases rapidly and then decreases

Choose from A-D which material would be most suitable to make each of the objects in question 1.3-1.6

A wood B sponge C plastic D rubber

1.3 Ladder (2)

1.4 Knife (2)

1.5 Bucket (2)

1.6 Shoe sole (2)


1.5 Which components are/is one of the Earth’s systems?

i) lithosphere

ii) hydrosphere

iii) biosphere

iv) atmosphere

(2)

A iii) only

B i), ii) and iv)

C i), ii), iii) and iv)

D i) only

1.6 Plants do not… (2)

A excrete

B respond to the environment

C respire

D move from place to place (locomotion)

1.7 Annual plants (flowering plant group) reproduce by… (2)

A seeds

B sexual intercourse (mating)

C being visited by animals

D human intervention only

1.8 Living things require the following to sustain life:

i) energy

ii) oxygen

iii) water

iv) soil

v) favourable temperatures

(2)

A ii) only

B i), ii), iii), iv) and v)

C i), ii), iii) and iv)

D ii) and iii)


1.9 A histogram is… (2)

A identical to a bar graph

B bigger than a bar graph

C a type of bar graph that shows ranges

D used only for specific types of animals like elephants

1.10 The most common result for the Natural Sciences examination in June 2014 was:

(2)

A 70 – 80%

B 60 – 70%

C 50 – 60%

D 40 – 50%

Herzlia Middle School 2014


QUESTION 2: TERMINOLOGY

Give the term for each of the following descriptions. Write only the term on the line below the statement. Do not give examples.

2.1 Anything that occupies space or volume

2.2 Process of finding out or proving something used by scientists in the laboratory.

2.3 A factor that is changed in an investigation.

2.4 A material that allows electricity to pass through it.

2.5 A test in which all of the variables are kept the same except for one of the variables which you will test.

2.6 Process that produces energy from food.

2.7 Characteristic that helps a living thing survive in its environment.

2.8 Feature that is passed down from parents to their young.

2.9 Relationship between two different factors in a scientific investigation such as the relationship between reading ability and education.

2.10 Conclusions based on evidence.

(10X1=10)


QUESTION 3: MATCHING COLUMNS

Choose a word or phrase from COLUMN B that matches a word or phrase in COLUMN A. Write only the letter (A – I) next to the question number (3.1 – 3.10).

COLUMN A

COLUMN B

3.1…... pigment A magnetic

3.2…... solute B A substance that does not dissolve

3.3…... salt solution C Sand

3.4…... iron D

Substance that gives colour to a tissue

3.5…... insoluble E A substance that dissolve

3.6…... lowest level of classification G mixture

3.7…... removal of wastes H holdfast

3.8…... photosynthesis I gills

3.9…... kelp J genus

3.10…. fish K producing food

L species

M excretion

(10X1=10)


SECTION B: MATTER & MATERIALS 62

QUESTION 1: Properties of Materials & Separating Mixtures

1.1 What method would you use to separate each of the following mixtures? Give a reason for your answer.

[9]

1.1.1 Iron filings and flour (3)

1.1.2 Beans and buttons (3)

1.1.3 The red colour from red petals. (3)


1.2 The apparatus below was set up to separate a mixture of alcohol and water.

Note: Marks are allocated for following diagram rules for 1.2.1 and 1.2.2.

[18]

1.2.1 Label the following on the diagram above: (10)

Liebig Condenser, retort stand, round bottomed flask, Bunsen burner, thermometer, inlet valve, distillate.

1.2.2 Give a suitable heading for the diagram (write this in the correct

position on the diagram above). (4)

1.2.3 What is the function of the Liebig condenser in the experiment? (2)

1.2.4 Give a suitable conclusion for this experiment. (2)


1.3 The following experiment was conducted in a Grade 7 class. [12]

1.3.1 Label the above diagram in the spaces provided. (6)

1.3.2 Name the method used to separate the mixture. (1)

1.3.3 What property of the mixture in this experiment allows it to be

separated using this method? Explain your answer. (2)

1.3.4 Mr Joseph ran out of substance labelled 6. Name another

substance that he could use to do the same experiment. (1)

1.3.5 Describe the results of this experiment. (2)

1

2

3

4

5

6


QUESTION 2: INVESTIGATION [23]

The Gr 7B class designed the following experiment to compare the best insulator. They measured the temperature decrease of hot water in each container after every 2 minutes and the following results were obtained. They put the same volume of water in each container and also measured the initial temperature of water in all the 5 containers.

The following temperature results were obtained and recorded after 10minutes.

Container A: 800C, B: 400C, C: 750C, D: 500C, E: 100C

2.1 Use the information above to make a table of results in the space below. (6)

A

B C D E


2.2 Using the information in the table in question 2.1 draw a bar graph using the graph paper on page 13. Note: Bars must be drawn in pencil. No colour (or highlighter must be used in the graph. The bars must not be shaded. (10) (10)

(10)


2.3 Identify the independent variable in the investigation. (1)

2.4 Identify the dependent variable in the investigation. (1)

2.5 Give three variables that must be controlled in this investigation. (3)

2.6.1 Which container was the best insulator? (1)

2.6.2 If the containers were made out of glass; plastic; polystyrene; tin and porcelain. Which material was container A made out of?

(1)


SECTION C: LIFE & LIVING 38

QUESTION 1: Biosphere

[18]

1.1.1 Describe the lithosphere. (2)

1.1.2 Name one animal that is found in the atmosphere and one plant that is found in the lithosphere in the Middle School.

(2)

Animal:

Plant:

1.1.3 True or false? The biosphere only contains living things. Explain your answer. (2)

1.1.4 Your friend’s grandmother has noticed that the spinach plants that are growing under the shade of her karee tree are smaller than those that are growing in full sun. Explain this difference and give your friend’s grandmother some advice.

(4)


1.2 The Grade 7s planted bean plants using the following method.

Method:

Place two been seedlings in each container. Make sure they are evenly spaced. Container A, B and C must be watered everyday with the same amount of water.

Place Container A in a sunny place, such as on a window sill.

Place Container B in a sunny area, but place the large beaker over the container, so that the seedling’s fresh air supply is blocked.

Place Container C in a dark area. Use the cereal box to make a light shield for the seedling. Cut some windows into the bottom of the cardboard box so that the plant can get air, but very little light.

Place Container D in the same sunny area as Container A, but do not give the seedling in Container D water for the duration of the investigation.

1.2.1 What is the aim of this investigation? (2)

1.2.2 Give a suitable hypothesis for this investigation. (2)

1.2.2 What are the expected results for each container? (4)

Container A:

Container B:

Container C:

Container D:


QUESTION 2: Variation [20]

2.1

2.1.1 How many species are shown in the picture above? (1)

2.1.2 How many varieties are shown in the above picture? (1)

2.1.3 Use the above picture to explain the term variation. (3)


2.2 Study the diagram of three bugs.

2.2.1 Give one similarity between the bugs. (1)

2.2.2 Give one difference between the bugs. (1)

2.2.3 Are these three different species or three variations of the same species? Give a reason to support your answer.

(2)


2.3 Mrs Leigh conducted a survey to find out the height of teenagers in the Western Cape. She recorded her results in this histogram.

2.3.1 How many pupils were surveyed?

(1)

2.3.2 How many pupils are between 155 and 160cm tall?

(1)

2.3.3 What is the most common height range?

(1)

2.3.4 How many pupils are less than 150cm in height?

(1)

2.3.5 Give one other example of an inherited characteristic. (1)

2.3.6 Give one example of an environmental characteristic. (1)

Number of

people


2.4 Read the article taken from iol.co.za and answer the questions.

New bean varieties bred to beat heat

March 26 2015 at 12:11pm

Scientists have bred 30 new varieties of "heat-beating" beans designed to provide protein for the world's poor in the face of global warming.

Described as "meat of the poor", beans are a key food source for more than 400 million people across the developing world, but the area suitable for growing them could drop 50 percent by 2050 because of global warming, endangering tens of millions of lives, scientists said.

Some of the 30 new types also have higher iron content to help increase their nutritional value, CGIAR, the research group backing the new discoveries, said in a statement.

New heat tolerant beans might be able to handle average global temperature increases of 4 degrees.

Bean growers in Latin America and sub-Saharan Africa - including Nicaragua, Haiti, Brazil, Honduras, Kenya, Tanzania, Uganda, and the Democratic Republic of Congo - are likely to be the worst hit by global warming, researchers said.

Some of these countries, dependent on small farmers to feed themselves, are not in good positions to adapt to a warming planet.

Clayton Campanhola, director of plant production and protection at the U.N. Food and Agriculture Organization, said the discovery of new "climate smart" bean strains is a big deal.

2.4.1 How many new varieties of beans have been bred? (1)

2.4.2 Why are these new varieties of beans important to the world? (4)

Documents

GRADE 7 NATURAL SCIENCE MID-YEAR EXAMINATION 8 June …