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Sonal Chauhan

Asked: December 29, 2023In: Class 10 Science

Which hormone is secreted into the blood when you are under stress? Name the gland that secretes this hormone. ii) How does it help the body to cope up in an emergency situation?

Hormones are chemical messengers secreted by glands, regulating various physiological processes. Examples include insulin, estrogen, and adrenaline. They travel through the bloodstream, influencing growth, metabolism, and other bodily functions.

Prasant

Asked: December 29, 2023In: Class 10 Science

How does blood sugar level get regulated in the human body?

Blood sugar level, or blood glucose, measures the amount of glucose in the bloodstream. It is regulated by insulin and glucagon. Maintaining a stable level is crucial for overall health.

Sonal Chauhan

Asked: December 21, 2023In: Class 10 Science

(i) Write two observations when lead nitrate is heated in a test tube. (ii) Name the type of reaction. (iii) Write a balanced chemical equation to represent the above reaction.

CBSE sample paper class 10 science 2023-24 with solutions

Sonal Chauhan

Asked: December 21, 2023In: Class 10 Science

Define catenation. How does valency of an element vary across a period?

CBSE Class 10 Science Board Sample Question Paper 2023-24

Sandeep Jha

Asked: December 21, 2023In: Class 10 Science

Sandeep Jha: The current flowing through a resistor connected in an electrical circuit and the potential difference developed across its ends are shown in the given ammeter and voltmeter. Find the least count of the voltmeter and ammeter. What is the voltage and the current across the given resistor?

sample paper class 10 science 2023-24 with solutions

Sandeep Jha

Asked: December 21, 2023In: Class 10 Science

In the experimental set up on “Carbon dioxide (CO2) is released during respiration”, if one forgets to keep the vial with Potassium hydroxide (KOH) in the conical flask, how will the result vary? Give details

CBSE Class 10 Science Pre Board Sample Question Paper 2023-24

Rajshree Chatterjee

Asked: December 21, 2023In: Class 10 Science

A student always sitting at the back of the bench rows in a class, who has difficulty in reading. What could name of his defect of vision? Could you draw ray diagrams to illustrate the image formation of his eyes, when he is seated at the (i) back seat and also (ii) front seat. Could you state two possible reasons of his defect of vision. Could you explain the method of correcting this defect with the help of a ray diagram, if possible.

CBSE Class 10 Science Sample Question Paper 2023-2024

Rajshree Chatterjee

Asked: December 21, 2023In: Class 10 Science

Name the phenomenon that governs the following: – i) Green beetles living in green bushes are not eaten by the crows. ii) Number of blue beetles in green bushes increases, only because the red beetles living there were trampled by a herd of elephants. iii) No ‘medium height plants’ are obtained in F1 generation, upon crossing pure tall and dwarf pea plants. iv) Tails of mice were surgically removed for several generations; still mice had tails in the following generations. v) A migrant beetle reproduces with the local population; as a result genes of migrant beetle enter the new population.

CBSE Class 10 Science Pre Board Sample Question Paper 2023-24

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