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Man is ______ in an ecosystem.
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Match the following
| Producers | Ecosystem |
| a. Cactus | 1. Forest |
| b. Aquatic plants | 2. Creek |
| c. Mangroves | 3. Aquatic |
| d. Pine | 4. Desert |
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Complete the following table.
| Organ system | Organs | Functions |
| 1. Respiratory | ||
| 2. Circulatory system |
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Explain the functional correlation of the circulatory system with respiratory, digestive and excretory system.
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Explain the differences.
External and internal respiration
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Whom should I Pair with?
| Group A | Group B | ||
| a. | Temperature of a healthy human body | i. | 296 K |
| b. | Boiling point of water | ii. | 98.6°F |
| c. | Room temperature | iii. | 0°C |
| d. | Freezing point of water | iv. | 212∘F |
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Who is telling the truth?
Joule is the unit of heat.
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Who is telling the truth?
Objects contract on heating.
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Who is telling the truth?
Atoms of a solid are free.
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Who is telling the truth?
The average kinetic energy of atoms in a hot object is less than the average kinetic energy of atoms in a cold object.
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The apparatus used to measure heat is called a ______.
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The heat contained in a substance is the measures of the ______ kinetic energy of atoms in the substance.
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Nishigandha kept a vessel containing all the ingredients for making tea in a solar cooker. Shivani kept a similar vessel on a stove. Whose tea will be ready first and why?
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Explain why rails have gaps at specific distances.
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At 15∘C the height of Eifel tower is 324 m. If it is made of iron, what will be the increase in length in cm, at 30∘C?
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Give scientific reasons:
As the sound wave propagates from one place to the other in air, the air itself is not required to move from one place to the other.
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Explain the experiment, with a neat diagram, to prove the following:
'Sound needs material medium for propagation.'
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Describe the construction, working and usefulness of a dry cell, with the help of a diagram.
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What is the difference in the atomic models of Thomson and Rutherford?
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