SCIENCE 7 PA 2(1) SESSION 2020-2021
General Instructions:
Read the questions carefully.
Marks are indicated against each question.
Check your paper before you submit it.
In addition to the
rock particles, the soil contains
air and water
water and plants
minerals, organic matter, air and water
water, air and plants
In plants, water is transported through
xylem
phloem
stomata
root hair
Hemoglobin is present in _____________ .
white blood cell
red blood cells
platelets
all of above
The blood from the heart is transported to all parts of the body by the [ ................... ].
arteries
veins
The safety device based on the heating effect of electric current is called a[ ................... ].
switch
fuse
Match the column.
Transport of food
Transpiration
Transport of water
Absorption of water
Stomata
Xylem
Root hairs
Phloem
Match the column.
Dark in colour
Lesser amount of humus
All kinds of soil
Large particles
A home for living organisms
Upper layer of the soil
Sandy soil
Middle layer of the soil
To make a battery of
two cells, the negative terminal of one cell is connected to the negative
terminal of the other cell.
True
False
When the electric
current through the fuse exceeds a certain limit, the fuse wire melts and
breaks.
True
False
Explain how soil is
formed.
What will happen if there are no platelets in the blood?
What are the components of blood?
What makes the blood look red?
How is clayey soil
useful for crops?
Why is it necessary to excrete waste products?
Will
the compass needle show deflection when the switch in the circuit shown by
figure is closed?
Do you think an
electromagnet can be used for separating plastic bags from a garbage heap?
Explain.
Does transpiration serve any useful function in the plants? Explain.
Why is blood needed by all the parts of a body?
Draw the circuit
diagram to represent the circuit shown in figure.
Zubeda made an
electric circuit using a cell holder shown in Fig. 14.4, a switch and a bulb.
When she put the switch in the ‘ON’ position, the bulb did not glow. Help
Zubeda in identifying the possible defects in the circuit.
