Download App

Management Of Natural Resources — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceManagement Of Natural Resources5 Marks
Question
A man bought a device X which could cook pulses, vegetables and rice without using any fuel like wood, coal, kerosene or LPG, etc. This device did not work at night. It also took a lot of time for cooking.
  1. Name the device X.
  2. What is the source of energy which cooks food in this device?
  3. What is the name of the process which traps energy in this device?
  4. State one advantage (other than saving on fuel) or using such a device for cooking food.
✓

Answer

  1. Device X is a solar cooker.
  2. Solar energy is the source of energy that cooks food in this device.
  3. Greenhouse effect is the process that traps energy in this device.
  4. The advantage of this technique is that it does not cause any pollution or harm to the environment.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "[5 marks Questions]" from Management Of Natural Resources→Management Of Natural Resources — all question types→Science STD 10 question papers→CBSE Board STD 10 question papers→CBSE Board question paper generator→

Similar questions

Plants show tropism in response to stimuli’. Comment.
→
State the reason why carbon can neither form $\text{C}^{4+}$ cations nor $\text{C}^{4-}$ anions, but forms covalent compounds. Also state reasons to explain why covalent compounds:
  1. Are bad conductors of electricity?
  2. Have low melting and boiling points?
→
  1. A person cannot read newspaper placed nearer than 50 cm from his eyes. Name the defect of vision he is suffering from. Draw a ray diagram to illustrate this defect. List its two possible causes. Draw a ray diagram to show how this defect may be corrected using a lens of appropriate focal length.
  2. We see advertisements for eye donation on television or in newspapers. Write the importance of such advertisements.
→
With the help of an activity; demonstrate how do we know that a chemical reaction has taken place?
→
An object 5cm high is held 25cm away from a converging lens of focal length 10cm. Find the position, size and nature of the image formed. Also draw the ray diagram.
→
On heating blue coloured powder of copper (II) nitrate in a boiling tube, copper oxide (black), oxygen gas and a brown gas X is formed.
  1. Write a balanced chemical equation of the reaction.
  2. Identity the brown gas X evolved.
  3. Identity the type of reaction.
  4. What could be the pH range of aqueous solution of the gas X?
→
A and B are the two systems of control and coordination in the human body. The messages in system A are transmitted in the form of chemical substances C which travel comparatively slowly through the blood stream. The substances C are made in tissues D present in the head and trunk of human body. The messages in system b are transmitted very quickly in the form of electrical impulses through fibres E. The effect of messages transmitted by system b usually lasts for a much shorter time as compared to those transmitted by system A.
  1. Name the system A. What does system A consist of?
  2. Name the chemical substance C.
  3. What is tissue D? Name any five such tissues in the human body.
  4. Name the system B. What does system B consist of?
  5. Name the fibres E.
  6. State whether system A controls the working of system B or system B controls the working of system A.
→
  1. Name an instrument that measures electric current in a circuit. Define the unit of electric current.
  2. What do the following symbols mean in circuit diagrams?
  1.  
  1.  
  1. An electric circuit consisting of a 0.5 m long nichrome wire XY, an ammeter, a voltmeter, four cells of 1.5 V each and a plug key was set up.
  1. Draw a diagram of this electric circuit to study the relation between the potential difference maintained between the points ‘X’ and ‘Y’ and the electric current flowing through XY.
  2. Following graph was plotted between V and I values:

What would be the values $\frac{\text{V}}{\text{I}}$of ratios when the potential difference is 0.8 V, 1.2 V and 1.6 V respectively? What conclusion do you draw from these values?
→
Distinguish between pollination and fertilisation. Mention the site and product of fertilisation in a flower. Draw a neat, labelled diagram of a pistil showing pollen tube growth and its entry into the ovule.
→
What can you as an individual do to reduce your consumption of the various natural resources?
→