Pollution of Air and Water — Science STD 8 — Question

What is the role of Lactobacillus in curd formation?

An archer stretches her bow while taking aim at the target. She then releases the arrow, which begins to move towards the target. Based on this information fill up the gaps in the following statements using the following terms. muscular, contact, non-contact, gravity, friction, shape, attraction. To stretch the bow, the archer applies a force that causes a change in its __________.

Where will the atmospheric pressure be greater-at ground level or at the top of high mountain?

Write one word for: Variety of plants, animals and microorganisms found in an area.

Two tiny holes are made in a plastic bucket, one near the middle part and the other just above bottom when this bucket is filled with water, the water rushes out from the bottom hole much faster than from the upper hole. What conclusion do you get from this observation?

Name two plant organ which is responsible for: Absorption if water and minerals.

Is it possible to extract petroleum from under the sea-bed?

Suggest a suitable word for the following statements. Agent which spreads pathogens from one place to another.

Name the term which is used to express the efficiency of a fuel.