Important question for board exam class 10
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Important Very Short Answer Type Questions for CBSE Class 10 Science Exam, are:
Q. Explain why a ray of light passing through the centre of curvature of concave minor gets reflected along the same path.
Ans.
The light falling on the centre of curvature is reflected back along the same path because the incident ray falls on the mirror along the normal to the reflecting surface.
Q. What is the important function of presence of ozone in earth’s atmosphere?
Ans.
Ozone is the Earth’s natural process for all life forms. It shields our planet from the UV radiations, as these ultraviolet rays are harmful for all the living things. Therefore, any change in the size of this layer will automatically affect the life of people, plants and animals living on earth.
Q. Dark reaction of photosynthesis does not need light. Do plants undergo dark reaction at night? Explain.
Ans.
Dark reaction does not mean that it occurs in the absence of light i.e., at night. Infact, it is the reaction occurring simultaneously with light reaction. It a chemical process occurring independent of light. This reaction is completely based on enzymes.
Get here the complete set of CBSE Class 10 Science: Important Very Short Answer Type Questions
Important Short Answer Type Questions
Here you will get important questions to be prepared for 3 marks answer type questions asked in CBSE class 10 Science paper.
Question numbers 6 to 15 in Section- C of Class 10 Science paper will be asked for three marks each. These are to be answered in about 50 words each.
Important Short Answer Type Questions for CBSE Class 10 Science Exam, are:
Q. How are we able to see distant and nearby objects clearly? Which part of eye helps in changing curvature of lens? Why no image is formed at blind spot?
Ans.
We can see distant and near objects clearly because of the property of accommodation of eye. Accommodation is the name given to the ability of the lens of the eye to change its focal length and produce focused images of both distant and near objects on the retina.
Ciliary muscle helps in changing curvature of the lens. They are attached to the lens and contract or release to change the lens shape and curvature.
No image is formed at blind spot because there are no photoreceptors, i.e., cones and rods to detect the light and send it to brain
Hope this helps you
Mark as a brainliest
Q. Explain why a ray of light passing through the centre of curvature of concave minor gets reflected along the same path.
Ans.
The light falling on the centre of curvature is reflected back along the same path because the incident ray falls on the mirror along the normal to the reflecting surface.
Q. What is the important function of presence of ozone in earth’s atmosphere?
Ans.
Ozone is the Earth’s natural process for all life forms. It shields our planet from the UV radiations, as these ultraviolet rays are harmful for all the living things. Therefore, any change in the size of this layer will automatically affect the life of people, plants and animals living on earth.
Q. Dark reaction of photosynthesis does not need light. Do plants undergo dark reaction at night? Explain.
Ans.
Dark reaction does not mean that it occurs in the absence of light i.e., at night. Infact, it is the reaction occurring simultaneously with light reaction. It a chemical process occurring independent of light. This reaction is completely based on enzymes.
Get here the complete set of CBSE Class 10 Science: Important Very Short Answer Type Questions
Important Short Answer Type Questions
Here you will get important questions to be prepared for 3 marks answer type questions asked in CBSE class 10 Science paper.
Question numbers 6 to 15 in Section- C of Class 10 Science paper will be asked for three marks each. These are to be answered in about 50 words each.
Important Short Answer Type Questions for CBSE Class 10 Science Exam, are:
Q. How are we able to see distant and nearby objects clearly? Which part of eye helps in changing curvature of lens? Why no image is formed at blind spot?
Ans.
We can see distant and near objects clearly because of the property of accommodation of eye. Accommodation is the name given to the ability of the lens of the eye to change its focal length and produce focused images of both distant and near objects on the retina.
Ciliary muscle helps in changing curvature of the lens. They are attached to the lens and contract or release to change the lens shape and curvature.
No image is formed at blind spot because there are no photoreceptors, i.e., cones and rods to detect the light and send it to brain
Hope this helps you
Mark as a brainliest
saifrehan2003:
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