Std7 Science Test 1

Which of the following diseases is transmitted through air?
1. Cholera
2. Malaria
3. Syphilis
4. Tuberculosis
Which of the following human activities may cause soil erosion?
1. Burning of papers
2. Cutting down of trees
3. Harvesting of Wild fruits
4. Dumping of plastic bags in the bush
The chart below shows a classiﬁcation of vertebrates. Use it to answer question

Which of the following animals could he represented by Q?
1. Bat
2. Frog
3. Ostrich
4. Snake
Which of the following is not a sign of a chemical reaction?
1. Colour change
2. Gas production
3. Heat
4. Melting
The diagram below shows a periscope made from plane mirrors.Use it to answer question

Which of the following statements is true about the image formed by the periscope’?
1. It is real
2. It is upright
3. It is smaller than the object
4. It is formed in front of the mirror,
Use the information below to answer question.

A red litmus paper and a blue litmus paper were dipped into some liquid. Both the red litmus paper and the blue litmus paper did not change colour.

Which of the following could be the liquid?
1. Lemon Juice
2. Tartaric acid
3. Vinegar
4. Water
Which of the following devices can be used for lifting the body of a car made from iron?
1. Electromagnet
2. Ladder
3. Trolley
4. Wheel barrow
Which of the following is not a method of saving electricity?
1. Using appliances that are earthed
2. Using appliances with low power rating
3. Leaving appliances on for a short period of time
4. Switching appliances off when they are not in use
Which of the following signs of puberty is common in both boys and girls?
1. Widening of the hips
2. Broadening of the chest
3. Development of strong muscles
4. Growth of hair around the pubic area
Which body system moves nutrients around the body?
1. The skeletal system
2. The nervous system
3. The circulatory system
4. The reproductive system
Use the information below to answer question

There were some rabbits and squirrels which fed on cabbage in a farm. The farmer brought some animals on the farm to help to reduce the number of rabbits and squirrrels.

The farmer brought in animals that feed on
1. rabbits and squirrels.
2. rabbits and cabbage
3. squirrels only.
4. cabbage only
Which of the following is a sign of drinking too much alcohol over a long period of time?
1. Increased desire to eat food
2. Bending when walking
3. Constant shaking
4. Clear eye sight
Which of the following actions is voluntary?
1. Breathing
2. Blinking
3. Writing
4. Yawning
Use the information and the diagram below to answer question.

In an experiment a pupil rubbed a plastic ruler with a woollen cloth as shown below and small sparks appeared between the ruler and the cloth.

Which natural event is formed the same way as that shown in the experiment?
1. Lightning
2. Rainbow
3. Rainfall
4. Thunder
Which of the following processes takes place at different temperatures for a sample of water?
1. Boiling
2. Evaporation
3. Freezing
4. Melting
Use the information below to answer question.

The following are steps earned out to separate a mixture of fine salt and soil but they are not in the correct order.

(i) Filter the mixture
(ii) Boil the solution
(iii) Stir the mixture in water

Which is the correct order of the steps?
Use the information and the diagrams below to answer question.

Three similar pins W, X and Y were attached to the bottom of glass test tubes using wax. The test tubes contained different materials as shown in the diagrams below. Heat was applied in the test tubes at the same time.

In which order will the pins fall off from the test tubes?
Which of the following seeds is matched with its main mode of dispersal?
1. A
2. B
3. C
4. D
The diagram below shows the female reproductive system. What is the function of the part labelled X?
1. To produce egg cells
2. To store the eggs before fertilisation
3. To support the foetus during pregnancy
4. To receive the seminal ﬂuid from the male
Which of the following elements is matched with its symbol?
1. A
2. B
3. C
4. D
The diagram below shows part of an old water pipe made out of copper.
Use it to answer question.

Which of the following statements describes how the fur deposit on the pipe was formed?
1. Soil particles in water got deposited in the pipe.
2. The inside of the water pipe slowly rusted.
3. Salts from water got deposited in the pipe
4. The water pipe slowly contracted.
Use the information below to answer question.

In each of the setups below, 10 g of marble chips, With the same particle sizes, was reacted with 50 ml of acid at different temperatures. One of the products of the reaction was carbon dioxide.

In which set-up will carbon dioxide be produced quickly?
1. A
2. B
3. C
4. D
The diagram below shows part of the solar system. P, Q. R and S are different positions of the moon as it moves around the Earth.
Use the diagram to answer question.

At which position will the lunar eclipse occur?
1. F
2. Q
3. R
4. S
Which of the following statements is not true about a lightning conductor?
1. its lower end is buried in the ground.
2. its top is higher than the building.
3. It is made out of a copper rod
4. It is covered with an insulator
Use the information below to answer question.

A student tested a sample of water for hardness by adding drops of soap solution to it. The water sample needed 25 drops of soap solution to form lather.

Which of the following actions can make the water sample form lather with less than 25 drops?
1. Adding washing soda to it
2. Filtering it with a cloth
3. Adding chlorine to it
4. Allowing it to settle
The diagram below shows the human digestive system, What is the function of the part labelled W?
1. To produce pancreatic juice
2. To break down proteins
3. To break down fats
4. To produce bile
Which of the following are characteristics of plants that grow in desert areas?
1. Large leaves and long roots
2. Small leaves and long roots
3. Large leaves and short roots
4. Small leaves and short roots
Which of the following practices cannot reduce teenage pregnancy?
1. Educating people about sex
2. Using birth control methods
3. Sticking to one partner
4. Abstaining from sex
The bar graph below shows the number of people infected with HlV/AIDS through different modes of transmission. Use it to answer question

Which mode of transmissson caused the least number of infections?
1. Child birth
2. Open wounds
3. Unprotected sex
4. Blood transfusion
Which of the following actions can transmit HIV?
1. Kissing
2. Sharing food
3. Breastfeeding
4. Sharing a bath
Use the information below to answer question.

Katso is not able to hear sound properly in one of her ears. The doctor told her that sound can reach the cochlea but it cannot reach the brain and so she will need an operation.

Which part of Katso’s ear should the doctor operate on?
1. Auditory nerve
2. Cochlea
3. Hammer
4. Semi-circular canals
Use the food web below to answer questions

Which word is used to describe aII the animals in the food web?
1. Decomposers
2. Scavengers
3. Consumers
4. Producers
Use the food web below to answer questions

What will happen to the number of jackals and goats If most of the lions die?
1. A
2. B
3. C
4. D
Which of the following metals is a liquid at room temperature?
1. Iron
2. NickeI
3. Copper
4. Mercury
Which of the following devices does not use an electric motor?
1. A
2. B
3. C
4. D
Use the information and the diagram below to answer question.

Soaked bean seeds were kept under different conditions as shown in set-ups X and Y. The bean seeds in setup X germinated while those in set-up Y did not germinate.

What conclusion can be made from the two set-ups about germination?
1. Water is needed for seeds to germinate
2. Air is needed for seeds to germinate
3. Seeds need warmth to germinate
4. Seeds need light to germinate.
Graph below shows the average amount of energy needed by a man and the average energy intake of the man. Use it to answer questions

What was the average energy intake of the man in March?
1. 1200 kilojoules
2. 1600 Kilojouies
3. 2000 Kilojouies
4. 2400 kilojouies
Graph below shows the average amount of energy needed by a man and the average energy intake of the man. Use it to answer questions

Which disorder is the man likely to develop after May?
1. Obesity
2. Marasmus
3. Kwashiokor
4. Anaemia
Which of the following instruments makes use of expansion of matter?
1. Beaker
2. Thermometer
3. Bathroom scale
4. Measuring cylinder
Use the information below to answer question.

A hunter was moving in a desert on a hot day. He saw images similar to pools of water ahead of him. Each time the hunter got nearer to the images, they seemed to move further away.

What is the name of the images that the hunter saw?
1. Mirage
2. Pond
3. Rainbow
4. Refraction
Which of the following diseases is not communicable?
1. Polio
2. Hepatitis B
3. Diphtheria
4. Asthma
The table below shows part of the immunisation schedule of a child.Use it to answer question.

A child was given vaccines HBV, OPV and DPT in one of the visits to the clinics. How old was the child?
1. 2 months
2. 3 months
3. 4 months
4. 18 months
Which of the following processes reduces the amount of carbon dioxide in the atmosphere?
1. Burning
2. Deforestatfon
3. Photosynthesis
4. Respiration
The diagram below shows some symbols used to record the weather in a weather chart. Use it to answer question

Which of the following symbols can be used to represent cloudy conditions, with showers and strong winds?
1. A
2. B
3. C
4. D
Which of the following signs does not show that static electricity is present?
1. A balloon sticking to other objects
2. A metal rod attracting small iron metals
3. A plastic ruler picking small pieces of paper
4. A television screen causing shock when touched
The diagram below shows the human eye. What is the function of the part labelled Z?
1. To control the amount of light entering the eye
2. To change light rays into electrical signals
3. To carry electrical messages to the brain
4. To focus light rays onto the retina
Which of the following pairs of animals eat the same type of food?
1. Lion and cheetah
2. Zebra and vulture
3. Giraffe and crocodile
4. Leopard and elephant
Which of the following energy changes take place when a bicycle dynamo is used to light a bicycle lamp?
1. A
2. B
3. C
4. D
The diagram below shows a man going down in a parachute. P represents a force acting on the man. Use the diagram to answer question.

Which force is represented by P?
1. Electrostatic
2. Frictional
3. Gravity
4. Magnetic
Which of the following is likely to happen when rain water carries fertilisers away from the ploughing ﬁeld into a lake?
1. Death of forest plants
2. Destruction of the ozone layer
3. Growth of too many water plants
4. Increase of the earth‘s temperature
Which of the following is not a function of the skeletal system?
1. Giving the body shape
2. Protecting soft body organs
3. Allowing for body movement
4. Sending messages around the body
Which of the following diagrams shows an effect of refraction of light?
$refraction-diagram.png$
1. A
2. B
3. C
4. D
The diagram below shows a crowbar used to move a large rock. Which letter represents the point where the effort is applied?
1. A
2. B
3. C
4. D
Which safety symbol should be shown on a bag containing maize treated with a poisonous substance?
1. A
2. B
3. C
4. D
Use the information and the diagram below to answer question.

An unlit candle was placed next to a burning fire Alter sometime. the candle began to bend as shown in the diagram.

By which process did the heat reach the candle?
1. Radiation
2. Evaporation
3. Convection
4. Conduction
Which of the following energy sources causes air pollution when used to generate electricity?
1. Sun
2. Coal
3. Wind
4. Water
The diagrams below show electromagnets used to pick iron pins. Which of the electromagnets will pick more iron pins when the switch is closed?
1. A
2. B
3. C
4. D
The diagram below shows the stages of water puriﬁcation K, L and M. Use it to answer question.

What are the stages K L and M?
1. A
2. B
3. C
4. D
Use the information below to answer question.

A loudspeaker is connected to a machine which produces sound of different frequencies.

In which of the following set-ups can the sound produced be heard by a human being?
1. A
2. B
3. C
4. D
Use the information below to answer question.

A man hitting a drum with a stick suddenly increases the force he uses to hit the drum.

What happens to the loudness and the pitch of the sound produced?
1. A
2. B
3. C
4. D