Question

what is food chain?vgive example what is human heart explain their structure and function what is teeth? name tje four types of teeth in your mouth and their function what is acid? list name of any two mineral acid names,formula and uses ​

Answer 1

Q1- What is food chain ? Give example .

A food chain is a path through which energy passes from one living thing to another living thing. For example - grass is eaten by a grasshopper. A grasshopper is eaten by a bird . A bird is eaten by a snake , a snake is eaten by a eagle. That eagle when die and decompose is than converted into humus by bacteria and then that humus gradually results into the formation of grass. This is called a food chain.

Q2 - What is a human heart ?

The organ of a human body which pumps blood and distributes the oxygen all over our body.

Q3 - Explain the structure and function of teeth .

There are 4 types of teeth -

• Incisors - Function is the cutting of food.
• Canines - Function is to rip the food.
• Pre - Molars - Function is to grind and chew the food.
• Molars - Function is the grinding and crushing of food.

Q4 - What is acid ?

An acid is a compound that dissolve in water to make a solutions that contains  more H+ ions than H - ions. Example - Hydrochloric Acid ( HCL ).

Q5 - Name of any two mineral acids , formula and uses .

• Hydrochloric acid(HCl)

=>  Use : to neutralise water in swimming pools

• .Nitric acid(HNO3)

=> Use :fertilizers

Formula of :

• Hydrochloric acid = H ---- CL
• Nitric acid =  H NO 3