lass 7 Active Science
Name: Date: Max, Marks: 80 Time: 180 min.
Instructions
. Reod the question paper carefullybefore you start writing.
. Write your name and the date on the question paper and the answer sheet.
Write the answers on the answer sheet.
Write only the question numbersfollowedby the answers. Do not write the questions.
Choose the correct options. (16xl=16 marks)
) Prachi's blood report shows lowlevels of white blood cells (WBCS). Which of the
following may happen to Prachiin such a case?
)The celis may receive less oxygen.
(i) The clotting of blood in case of an injury may take more time.
(i;She may get easily infected by disease-causing agents.
(iv) The nutrients may not get carried by blood.
2) Which term describcs the ratio of an object's displacement to the time taken for its
motion?
(i Velocity (i) Distance (ii) Acceleration (iv) Speed
3) Which of the following factors is not sui cient to conclude a chemicalchange?
(i Release of a gas (ii) Change in temperature
(ii) Change in colour (iv) Change in physical state
4) Which of the following factors does not aect the strengthof an electromagnet?
i}Strength of the current in thecoil (ii) Number of turns in the coil
(i) Material of the core (iv) Colour of the wire used in the coil
) During the treatment of sewage at a wastewater treatment plant, a chemical is used to
disinfect the wastewater. ldentify the chemical from the following.
) Activated charcoal (ii) Ozone (ii) Silica (iv) Washing soda
, Wha
Amit's morning walk is given below. J)
for
6) The distance-time graph
D
Distance
Time
Find the segment in which Amit's speed is zero.
(i) AB (i) BC (ii) CD (iv) AE
7) In whichof the following cases the acceleration is negative?
() Firing a bullet
(i)Aman running in uniform speedin astraight line
(i) A toy car moving at a uniform speed in a circular track
(iv) Catching a moving ball
8) A
patient's urine test report is shown below.
Substances in Urine Water, Proteins, Urea
Identify the disease based on the abnormalsubstances found in the urine and the
following treatment that should be givento the patient?
(0) Infectionin the urinary tract -
Medication
(i) Kidney damage - Dialysis
(ii) Diabetes - Radiotherapy (iv) Bacterial infection - Physiotherapy
9) Which of the following statements is true with regards to fuse?
(i) The fuse wire should be thick in nature so that it can allow more current to
pass
through it.
(i) The fuse wire should have a low melting poirt.
(iüi) The fuse wire can be made up of tungsten.
(iv) The fuse wire has a low resistance.
Name: Date: Max, Marks: 80 Time: 180 min.
Instructions
. Reod the question paper carefullybefore you start writing.
. Write your name and the date on the question paper and the answer sheet.
Write the answers on the answer sheet.
Write only the question numbersfollowedby the answers. Do not write the questions.
Choose the correct options. (16xl=16 marks)
) Prachi's blood report shows lowlevels of white blood cells (WBCS). Which of the
following may happen to Prachiin such a case?
)The celis may receive less oxygen.
(i) The clotting of blood in case of an injury may take more time.
(i;She may get easily infected by disease-causing agents.
(iv) The nutrients may not get carried by blood.
2) Which term describcs the ratio of an object's displacement to the time taken for its
motion?
(i Velocity (i) Distance (ii) Acceleration (iv) Speed
3) Which of the following factors is not sui cient to conclude a chemicalchange?
(i Release of a gas (ii) Change in temperature
(ii) Change in colour (iv) Change in physical state
4) Which of the following factors does not aect the strengthof an electromagnet?
i}Strength of the current in thecoil (ii) Number of turns in the coil
(i) Material of the core (iv) Colour of the wire used in the coil
) During the treatment of sewage at a wastewater treatment plant, a chemical is used to
disinfect the wastewater. ldentify the chemical from the following.
) Activated charcoal (ii) Ozone (ii) Silica (iv) Washing soda
, Wha
Amit's morning walk is given below. J)
for
6) The distance-time graph
D
Distance
Time
Find the segment in which Amit's speed is zero.
(i) AB (i) BC (ii) CD (iv) AE
7) In whichof the following cases the acceleration is negative?
() Firing a bullet
(i)Aman running in uniform speedin astraight line
(i) A toy car moving at a uniform speed in a circular track
(iv) Catching a moving ball
8) A
patient's urine test report is shown below.
Substances in Urine Water, Proteins, Urea
Identify the disease based on the abnormalsubstances found in the urine and the
following treatment that should be givento the patient?
(0) Infectionin the urinary tract -
Medication
(i) Kidney damage - Dialysis
(ii) Diabetes - Radiotherapy (iv) Bacterial infection - Physiotherapy
9) Which of the following statements is true with regards to fuse?
(i) The fuse wire should be thick in nature so that it can allow more current to
pass
through it.
(i) The fuse wire should have a low melting poirt.
(iüi) The fuse wire can be made up of tungsten.
(iv) The fuse wire has a low resistance.
