The motion of falling bodies towards earth is due to

Device used to see very very small object is ____

Temperature is a property which determines

The resistance of a conductor is inversely proportional to its _______.

A source emits a frequency of 1 kHz is moving toward a rest listener with a speed of 0.9 V, where V is the speed of sound wave. The frequency heard by the listener is ________.

If the exposure is about 600 R, it causes __________.

Mass of an electron is

The number of elements present in sixth period of modern periodic table is __________

Example for solid in solid ___________

Copper displaces - metal from its solution.

The organic acid present in Vinegar is ___________ acid.

Exarch and tetrarch xylem are a feature of ___________.

Each kidney is made up of several___________

Salt added to pickles brings about__________

_____ carry command from spinal cord to our arm.

_____ is also called as Stress hormone.

An outgrow arises on the parent body during________

Down's syndrome is a case of___________

Biogenetic law or Recapitulation theory was given by__________

An organism having more than two sets of chromosomes is called

____________ is not a method of treatment for cancer.

Wild life preservation society of India is located in_______

Which one is used  to draw and edit pictures?

What is meant by natural motion?

The colour of the sun is reddish during the sun rise and sunset. Explain why?

Define one mole of a substances.

What is MCB?

Why longitudinal waves are called pressure waves?

Define radioactivity. What are radioactive elements?

What is a poly atomic molecule?

What is Gangue?

7.5 litre of ethanol is present in 15 litre of aqueous solution of ethanol. Calculate volume percent of ethanol solution.

Define ionic product of water

What are Bio degradable and Nonbiodegradable detergents?

Draw the ultrastructure of mitochondria and label the parts.

Define Osmosis.

How are neurons classified based on function.

Write a note on mineralocorticoids

Write a notes on Placenta.

Differentiate diploid and haploid condition.

Give some examples of vestigial organs in man.

Mention two characteristics of stem cells.

Differentiate Malignant and Non malignant tumour.

What is the role of hydropower plants?

Distinguish file and folder.

Give examples for Newton's third law.

Explain the refraction of light through a glass prism.

Define and describe thermal expansion.

Kalaivani was watching at a metal pipe, one end of which is connected to a tank at the top of her building and the other end to the tap, which is near the ground level. She was admiring how the water flows from top to the bottom through the pipe. She went and asked her mother, who was an engineer.
(i) Also Kalaivani asked her mother that can she able to compare this with any other scientific concepts?
(ii) How would her mother have compared the resistance in a water pipe as well as in a conductor.
(iii) Give the expression for resistors connected in series and parallel.

(i) How to analyse the planets are irregular shaped?
(ii) What is the method used to find it?
(iii) Planets are sensitive to different frequencies Justify.

What are the precautions to be taken by people working in radiation labs?

Give the applications of Avogadro's hypothesis.

Explain hydraulic washing with a neat diagram.

Write some solubility substances in water at 25°C.

Explain the classification based on the direction of the reaction.

Explain how ethanol is manufactured from molasses?

Draw a transverse section of dicot leaf and label the parts

Describe the heart of rabbit.

List the difference between RBC and WBC.

Rani fell from her bike and had a head injury. She was hospitalized and discharged later. What do you think she could have done to save herself from this accident.

Describe the role of pancreas in maintenance of blood sugar level.

Government has brought in lot of measures to focus on health of a pregnant woman. Answer the following questions based on the same
(a) Name the tissue responsible for transfer of nutrients from mother to the offspring during pregnancy.
(b) Suggest two measures to maintain a woman's health during pregnancy.

Mala had a huge scar on her cheek after she met with fire accident during her college days. She is worried if her baby would inherit the scar she had acquired. She clarified with her doctor, she need not worry about it, as her scar is an acquired trait.
(i) What are acquired traits?
(ii) How is it different from inherited traits?

Explain Use and Disuse theory.

Plants seeds got from other countries are tested in plant quarantine. Reason out.

What is diabetes? Explain the types.

Write a note an solar cells.

Explain in detail the uses and main parts of the 'SCRATCH' animation software.

A 20 g bullet moving at 300 m/s stops after penetrating 2 cm of bone. Calculate the average force exerted by the bullet.

Alight travels from air into water, the angle of refraction is 25° to the normal. Find the angle of incidence. Refractive index of water is 1.33. μ_a=1.

If boiling point of water is 95°F, What will be the reading in kelvin scale?

Find the
(i) equivalent resistance,
(ii) current through each reactor,
(iii) Total current for the given circuit,
(iv) Voltage drop across each resistor.

At 10° C, how for away is a reflecting surface if you hear an echo in 0.274s?

If the loss in mass during a fission reaction is 0.20 g, how much energy will have been produced?

Calculate the gram molecular mass of carbon dioxide (CO₂)