29.What is an antacid? How does an antacid work?
30.How does heat and temperature differ from each other?
31.
a. Define sericulture.
b. What is a cocoon?
c. Explain the process of obtaining silk thread from the cocoon.
32.Differentiate between acids and bases.
33.List any three ways by which we can conserve water.
34.The states of rest and motion are relative terms. Explain with the help of an example.
35.What is a lightning conductor? How does it help?
36.What is camouflage? Explain with example.
37.Why are houses made of mud and bricks in rural areas?
Answers
Explanation:
29.Antacids reduce acidity by neutralizing (counteracting) acid, reducing the acidity in the stomach, and reducing the amount of acid that is refluxed into the esophagus or emptied into the duodenum.
30.Heat describes the transfer of thermal energy between molecules within a system and is measured in Joules. Heat measures how energy moves or flows. ... Temperature describes the average kinetic energy of molecules within a material or system and is measured in Celsius (°C), Kelvin(K), Fahrenheit (°F), or Rankine (R)
31.a)the production of silk and the rearing of silkworms for this purpose.
b)a silky case spun by the larvae of many insects for protection as pupae.
c)Cocoons of silk moth are used to obtain the silk fibres. These cocoons are kept under the sun or boiled or exposed to steam. The silk fibres is then separated. This process of obtaining wool from the cocoons is called reeling.
32.An acid is a substance that produces hydrogen ion (H+) as the only positive ion when mixed with water. A base is a substance that produces hydroxyl ion (OH–) as the only negative ion when mixed with water. An acid is a species that can release/donate a proton to another species.
33.Check your toilet for leaks. ...
Stop using your toilet as an ashtray or wastebasket. ...
Put a plastic bottle in your toilet tank. ...
Take shorter showers. ...
Install water-saving shower heads or flow restrictors. ...
Take baths. ...
Turn off the water while brushing your teeth. ...
Turn off the water while shaving.
34. Rest and motion are the relative terms because they depend on the observer's frame of reference. So if two different observers are not at rest with respect to each other, then they too get different results when they observe the motion or rest of a body.
35.Lightning conductor is a metal rod placed on a building and connected with the ground below to protect the building from being damaged by lightning. Its purpose is to offer a low resistance path to lightening and allow it to pass to the ground without impacting the building.
36.To camouflage is defined as to hide or disguise yourself. An example of camouflage is when you dress in certain colors so you will blend in with your environment. ... An example of camouflage is a chameleon's skin, which changes colors depending on his environment.
37.Mud and clay cools the house. The houses in rural areas are built with bricks and mud so as to keep the houses warm in winters and cool in summers. Since these materials are poor conductors of heat, they do not allow heat to pass through them easily.
Answer:
Up one is the great. .......