Helga

AMAZING KIDS SCHOOL Grade seven Natural science Examinations July 2008-07-20 Section A (Short questions) 1

Which sentence describes biotic things? A. they are living organisms from both plants and animals B. they are animals only C. they are non living organisms e.g. light, stone

2

Which of the following is not a characteristic of biotic things A. They reproduce B. They respire C. They move D. They do not die

3

Light travels in a ________________line A. bent B. straight C. reflected D. refracted

4

When light travels through different media and bends this is a A. radiation B. absorption C. reflection D. refraction

5

What colour would be suitable for a shirt when it is sunny and very hot and why A. Black B. white C. Black because it absorbs D. White because it reflects and radiates heat away

6

The nearest planet to the sun is ____. A. Earth B, Mercury C. Mars Jupiter

7

How long is our Earth’s journey around the sun A. 365 ¼ days B. 490days C 69days

8

One satellite of the earth is_________ . A meteors

9.

When the earth goes around the sun it ______ it A. Orbits axis

10

The furthest planet from the sun is_____A. Pluto B. Mercury C. Venus D. Mars

B. moon

D.

C orbit B. eclipse

C

SECTION B (LONG QUESTIONS) Answers in full statements B1.

planet takes longer to go around the sun Mercury and Pluto? (3)

B2 B3

Why do we have winter when it is summer in the Northern Hemisphere? Why do women have a monthly period? (3)

B4

What changes take place during puberty (3)

B5

During the process of digestion what 3 things happen in the mouth?

B6

The Nervous system consists of the _____ and the _____? (2)

B7

Explain the function of mucus in digestion?

(3)

(3)

(3)

SECTION C (ONE WORD ANSWERS) 1 When one cannot do without alcohol we say he/she is _________________ 2 Yeast + water + sugar

__________ + carbon dioxide

3 Name one organ of excretion

(1)

(1)

(1)

4 Two substances that are expelled out of the body are _____ and ______ 5 What do carbohydrates do to the body?

(2)

(1)

SECTION D DIAGRAMS AND TABLES Digestive system naming parts

Female And Male Organs

Seasons________

Filtration p36

Open circuit p62

SECTION E 1.a Name two bad effects of drug abuse b

liver

alcohol

water

What happened to the liver in alcohol 2 Give organisms that completes the food chain Grass Zebra ________ bacteria 3 In which ecosystem does the food chain occur? 4

Wall The person on the other side cannot see light. Why?

light

5 If the mass of the iron piece is 120gand the volume is 40cm³ what is the density of the iron piece The outer shell of

In an atom the number of protons is equal to the number __________________

7 When similar atoms combine they form _________ A. compound

B. elements

8 The difference between an element and a compound is A. I n a compound different atoms combine while in an element similar atoms combine B. In a compound more than two atoms combine C. The element has compounds in it