Std6 Science Test 3

HIV positive mothers are discouraged to breastfeed their babies.What is the main reason why they should not breastfeed?
1. They may transmit the virus to the baby.
2. They can use the milk given to their babies.
3. They may become weak from breastfeeding.
4. They do not produce enough milk for their babies.
A force is applied on an object. Which of the following is not likely to change?
1. The size of the object
2. The mass of the object
3. The Speed at which the object moves
4. The direction in which the object moves
The diagram below shows an obiect placed in front of a plane mirror

Which of the following is a characteristic of the image formed?
1. It is upside down.
2. It is larger than the object.
3. Its left side appears to be on the right side.
4. it is formed on the same side of the mirror as the object
Which time period is caused by the earth's rotation on its axis?
1. Weeks and months
2. Years and decades
3. Seasons and years
4. Days and nights
The diagram below shows two houses P and Q in different compounds

Which of the following could be a disadvantage of house Q during thunderstorms?
1. The house may have a power failure.
2. The house may be damaged by lightning
3. There might be too much noise in the house
4. There might be too much light reaching in the house
Which of the following is a source of chemical energy?
1. Coal
2. Sun
3. Water
4. Wind
A student wants to dissolve a sweet in water to make a drink.Which of the following actions will not make the sweet dissolve quickly?
1. Heating the water
2. Steering the mixture
3. increasing the volume of the water
4. Breaking the sweet into smaller pieces
Which of the following is an energy giving food?
1. Bananas
2. Eggs
3. Fish
4. Spinach
A box of goods is pushed over the rollers as shown in the diagram

What is the reason for pushing the box over the rollers?
1. To remove all forces acting on the box
2. To create more space to lift the box
3. To reduce the weight of the box
4. To make the box move easily
What type of electricity is produced when a comb is rubbed with a cloth?
1. Magnetic
2. Static
3. Hydro electric
4. Electromagnetic
Which of the following is a way of reducing pollution?
1. Recycling materials
2. Dumping waste behind the yard
3. Throwing waste in rivers
4. Burning used tyres
Which instrument is used to estimate time during the day?
1. Rain gauge
2. Thermometer
3. Shadow stick
4. Wind vane
What is the process X in the diagram below?
1. Melting
2. Condensation
3. Evaporation
4. Freezing
Use the information below to answer question.

Kabo took a bath and used the same water to wash his sister’s car

What was the reason for his action?
1. Purification
2. Filtration
3. Conservation
4. Contamination
A thermometer at 25°C is put in a container with ice cubes. What would happen to the thermometer reading?
1. it would rise
2. It would fall
3. it would stay the same.
4. It would fall then rise
Which of the following actions will not increase the rate of evaporation?
1. High temperatures
2. Large surface area
3. High humidity
4. Fast moving air
Which of the following materials is a good conductor of heat?
1. Glass
2. Metal
3. Plastic
4. Wood
Study the food chain below and use it to answer questions 18 and 19

Which organism in the food chain produces its own food?
1. Dog
2. Plants
3. Rabbits
4. Vulture
Study the food chain below and use it to answer questions

What will happen to the rabbits if the number of plants decreases?
1. The number of rabbits will decrease
2. The number of rabbits will increase
3. The number of rabbits will remain the same
4. The rabbits will all die
When one puts a stick into water it looks as if the stick is bent. This is caused by the light being
1. Refracted
2. Reflected
3. Accelerated
4. Corrected
Convection of heat can take place
1. Only in solids
2. Only in liquids
3. In liquids and gases
4. Only in gases
Sugar and sand can be separated by
1. Dissolving and then ﬁltering
2. Using a permanent magnet
3. Heating the mixture
4. Dissolving and boiling
The best way to look at a solar eclipse is to use
1. Binoculars
2. Sunglasses
3. Welding glasses
4. A telescope
Water from wells and boreholes __________________.
1. is usually very soft
2. is often hard
3. does not contain dissolved salts
4. usually lathers well with soap
In a solution, water is called the ______________________.
1. Solvent
2. Solute
3. Solution
4. Dissolver
Acid rain __________________________.
1. Does not affect plant growth
2. ls caused by acidic gases dissolving in rainwater
3. Does not affect buildings and stonework
4. Is not caused by the burning of fuels
A substance has a melting point of 17°C and a boiling point of 118°C. What state will it be at:

a room temperature of 16°C? ________________________________.
A substance has a melting point of 17°C and a boiling point of 118°C. What state will it be at:

a temperature of 100°C? ________________________.
A substance that cannot dissolve in water is called an ________________ substances.
A thermal power station uses ___________________ fuel.