Std7 Science Test 3

A scorpion is an example of .........................
1. mammal
2. invertebrate
3. amphibians
4. reptile
Which of the following components of air allows substances to burn?
1. water vapour
2. inert gas
3. oxygen
4. nitrogen
Which two chemical substances are required for photosynthesis?
1. water and carbon dioxide
2. oxygen and water
3. carbon dioxide and glucose
4. glucose and oxygen
Where are the enzymes which help in the digestion of food stored?
1. stomach
2. pancreas
3. small intestine
4. liver
Which one is a strong acid?
1. sulphuric acid
2. citric acid
3. carbonic acid
4. lactic acid
How did rollers improve transpotation of heavy loads?
1. they increased people's energy
2. they did not require people to pull
3. they reduce friction
4. they did not requaire animals to pull
When alum is added to water that is slightly milky, the process is called............................
1. sterilization
2. sedimentation
3. flocculation
4. filtration
Which of the following disease is the most cause of blindness?
1. trachoma
2. diabetes
3. cataract
4. bacterial infection
Which part of the body carries impulses from the body to the spinal cord?
1. a motor nerve
2. reflex nerve
3. voluntary nerve
4. sensory nerve
The movement of heat through metal is called ...................
1. condensation
2. evaporation
3. conduction
4. melting
Two characteristics of vertebrates are .....................
1. excretion and photosynthesis
2. reproduction and photosynthesis
3. respiration and photosynthesis
4. reproduction and respiration
Heat losses can cause a substance to undergo...........................
1. An increase in size
2. change in state
3. A increase in temperature
4. decrease in its hardness
A beaker of water is heated at its base. Why does the water at the base rise?
1. it expands and becomes more dense
2. it contracts and becomes less dense
3. it contracts and becomes more dense
4. it expands and becomes less dense
What is the function of the uterus?
1. where babies grow
2. to recieve sperm
3. to close off the vagina
4. where ovum is produced
Which of the following metals is a liquid at a room temperature?
1. Aluminium
2. zinc
3. mercury
4. copper
Which of the following should be considered when buying an electrical appliance?
1. power rating
2. size of the appliance
3. weight of the appliance
4. color of the appliance
Which statement is correct about the speed of sound?
1. sound travel faster in liquids than in gases
2. sound travel faster in liquids than in solids
3. sound travel faster in gases than in solids
4. sound travel faster in solids than in gases
Which of these is not one of the three small bones in the middle ear?
1. hammer
2. cochlea
3. stirrup
4. cervix
Where does implantation occur?
1. fallopian tube
2. uterus
3. ovary
4. cervix
What can be done to prevent the iron from rusting?
1. add nail
2. grease the nail
3. remove stopper
4. pours soil on the top of the soil
A wheelbarrow is used to move a load of sand. Which of these statements is correct if one regards the wheelbarrow as a lever?
1. the load is placed at the one of the lever
2. the effort is applied between the pivot and the load
3. the pivot is between the load and the effort
4. the load is between the effort and pivot
A car driving on the wet road will slide more than one driving on a dry road that is because between the tyres and the dry road there is more..........
1. magnetism
2. gravity
3. friction
4. heat
A person moves from sunlight into a dark room, how do their eyes respond?
1. the blind spots becomes smaller
2. the blind spots become larger
3. the pupils become larger
4. the pupils become smaller
Which part of the seed grows into the root system of a plant?
1. testa (seed coat)
2. radicle
3. plumule
4. cotyledon
An animal that lives in both water and on land, it is cold blooded and it lays eggs. In which class of vertebrate does the animal belong to?
1. Amphibians
2. mammals
3. birds
4. fish
What make it possible for both plants and animals to live on the planet earth?
1. there is enough soil that plants and animal depend on
2. there is enough sunlight for plants to breath
3. there is water, air and suitable temperature
4. there is too much water on earth
Which of the following activities use heat energy?
1. riding a bicycle
2. loading a truck
3. dying clothes
4. writing a letter
There is vacuum between the double walls of a vacuum flask. which type of the heat transfer are reduced by the vacuum?
1. conduction, convection, radiation
2. convection and radiation
3. conduction and convection
4. conduction and radiation
Which two nutrients are needed for healthy bone and tooth development?
1. calcium and iron
2. iron and vitamin C
3. vitamin D and calcium
4. vitamin C and vitamin D
What do you call a non flowing electric charge?
1. indirect electricity
2. static electricity
3. alternating electricity
4. direct current
Which of the following is not a form of energy?
1. fuel
2. potential
3. kinetic
4. heat
Why is it important for a baby to recieve breast milk?
1. to allow the breasts to continue producing milk
2. to prevent the breast from being painful
3. breast milk is cooler for the child
4. breast milk is free from germs
Which of the following is the correct procedure for immunizing a child against polio?
1. putting drops of vaccine in the mouth four times
2. four injections during the first four months
3. injecting the vaccine on two occasions
4. injecting the vaccine only once
Vultures and hyenas are members of a group of animals called.............
1. predators
2. scavengers
3. herbivores
4. consumers
Which organ pumps blood to all parts of the body?
1. kidneys
2. lungs
3. heart
4. lever
Which of these statements is true about germination of a maize seed?
1. the cotyledon remains below the soil
2. the plumule starts growing first
3. the cotyledon splits open
4. the testa splits open
[A red litmus paper and blue litmus paper were dipped into some liquids. Both the red litmus paper and blue litmus paper did not change color.] Which of the following could be a liquid?
1. water
2. vinegar
3. tartaric
4. lemon juice
What has the chemical energy been converted to when she is at the top of the stairs?
1. nuclear energy and heat energy
2. kinetic energy and potential energy
3. kinetic energy and nuclear energy
4. potential energy and heat energy
The diagram above shows an instrument used to measure a weather condition. Which weather condition is measure by the instrument?
1. rainfall
2. wind speed
3. air pressure
4. temperature
Which part is the site for fertilization in the diagram of the female reproductive system below?
1. A
2. B
3. C
4. D
What is the name of the part labelled F?
1. femur
2. pelvis
3. leg
4. bone
In the food web above , the jackal is a ....................................
1. decomposers
2. scavengers
3. consumers
4. producers
Answer question 43 and 44 using above diagram. Which circuit is shown above?
1. series circuit
2. main switch
3. trip switch
4. parallel switch
Which switches must be closed to light only lambs 1 and 3?
1. switch 1 only
2. switch 1 and switch 2 only
3. switch 1 and switch 3 only
4. switch 2 and switch 3 only
A man sees a stone at the bottom of a pool of water. Which path could be taken by light form the stone to the man?
1. A
2. B
3. C
4. D
What are X and Y?
1. brain and effector
2. brain and spinal cord
3. receptor and effectors
4. receptor and spinal cord
The diagram above shows the fruit of a plant. By which method are the seeds of the fruit mostly likely to be dispersed?
1. animal
2. water
3. wind
4. self
Which type of soil contains the largest particles?
1. clay
2. loam
3. sandy
4. silt
Which of the following substances is not soluble in water?
1. alcohol
2. flour
3. table salt
4. sugar
How would heat from the flame reach hand?
1. by radiation
2. by convection
3. by convection and radiation
4. by conduction and convection
Which process caused the water to turn purple?
1. conduction
2. convection
3. evaporation
4. radiation
A student adds a large amount of sugar crystals in a small amount of water and stirs. Some crystals did not dissolve even after stirring for a long time. What is the term used to describe this condition?
1. dissolving
2. melting
3. saturation
4. suspension
What observation will be made about the balloons?
1. Both balloons will become smaller
2. Ballon X will become bigger than ballon Y
3. Balloon Y will become bigger than balloon X
4. Both balloons will increase to the same size
Which of the following processes will occur at any temperature?
1. boiling
2. evaporation
3. freezing
4. melting
Which of the following objects is artificial and luminous?
1. lamp
2. mirror
3. moon
4. sun
A lizard eats worms from a tree. Which of the following terms describes the tree?
1. consumer
2. community
3. decomposer
4. habitat
Which of the following can a student use to prepare a salt solution faster?
1. fine salt and cold water
2. fine salt and warm water
3. coarse salt and cold water
4. coarse salt and warm water
A farmer was walking in a field and some weeds got stuck onto his trousers. Through which mode of dispersal are the weeds spread?
1. Animal
2. Self
3. Water
4. Wind
On which day will the Moon be brightest when seen from the Earth?
1. Day 1
2. Day 7
3. Day 14
4. Day 21
Which nutrient does the body lack?
1. Carbohydrates
2. Iodine
3. Iron
4. Protein