I. Fill in the blanks:
1. Green plants are called ___________ as they can prepare their own ________.
2. Most ________ and ________ get their food from dead and decaying plants and animals. They are called_____________.
3. In some cases two organisms that live together help each other. They are called ____________.
4. The relationship between these two organisms is called __________.
II. State whether True or False:
1. All living things get energy from food.
2. Stomata are small pores present mainly in roots of plants.
3. Leaves are green because of chlorophyll.
4. Some plants are heterotrophic and depend on other organisms for food.
5. Saprophytes are green in colour.
6. Lichen has an alga and fungi living together and helping each other.
7. Plants need nitrogen in addition to glucose to synthesis proteins.
III. Short answer questions:
1. Which processes help the body get energy from food?
2. What factors are essential for photosynthesis to take place?
3. What willl happen when you add a drop of iodine to starch?
4. Why are green plants called autotrophs?
5. Name any two non-green plants.
6. What do you mean by symbiosis?
7. What is a saprophyte?
8. What are decomposers?
9. What are insectivorous plants?
10. Give one example of parasite, symbiont, saprophyte, insectivorous plant
IV . Long answer questions:
1. How will you test the presence of starch in leaves?
2. Explain briefly what happens during photosynthesis.
3. Some plants are heterotrophs. Explain with example.
4. What are autotrophs? How is an autotroph different from heterotroph.?
5. How are nutrients put back in soil?
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SCALARS & VECTORS
Physical quantities which can completely be specified by a number (magnitude) having an appropriate unit are known as "SCALAR QUANTITIES".
Scalar quantities do not need direction for their description.
Example: Work, energy, electric flux, volume, refractive index, time, speed, electric potential, potential difference, viscosity, density, power, mass, distance, temperature, electric charge, electric flux etc
Physical quantities having both magnitude and direction with appropriate unit are known as "VECTOR QUANTITIES".
We can't specify a vector quantity without mention of direction.
Velocity, electric field intensity, acceleration, force, momentum, torque, displacement, electric current, weight, angular momentum etc.
"Kinematics is the branch of Physics in which we discuss bodies at rest or motion without the reference of external agent that causes motion or rest."
"The branch of physics which deals with the description of motion of objects without reference to the force or agent causing motion in it, is called Kinematics."
"If a body does not change its position with respect to its surroundings then
the body is said to be in a state of rest."
"If a body continuously changes its position with respect to its surrounding
than it is said to be in a state of motion."
Motion of objects can be divided into three categories.
(i) TRANSLATIONAL MOTION (ii) ROTATIONAL MOTION (iii) VIBRATIONAL MOTION
"Motion of a body in which every particle of the body is being displaced by the same amount is called Translational Motion".
EXAMPLE: (i) Motion of a person on a road. (ii) Motion of a car or truck on a road.
"Type of motion in which a body rotates around a fixed point or axis is called Rotational Motion."
EXAMPLE: (i) Motion of wheel (ii) Motion of the blades of a fan
"Type of motion in which a body or particle moves to and fro about a fixed point or mean position is called Vibratory Motion."
EXAMPLE: (i) Motion of simple pendulum (ii) Motion of the wires of guitar (iii) Motion of swing
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