Reaching the Age of Adolescence — Science STD 8 — Question

The fresh fruits and vegetables conduct electricity to some extent. Explain why

Fill in the following blanks with suitable words: The process of ______________ ensure continuity of life on earth.

What are the products obtained when combustion takes place ?

A gas is utilised by the trees and plants in photosynthesis. The same gas also traps the heat rays reflected by the Earth and is also given out by humans during respiration. Name the gas and the phenomenon of increase in temperature for which it is responsible.

Fill in the blanks in the following sentences:The substances which have very ________________ ignition temperature and can easily catch fire with a flame are called __________ substances.

State whether the following are True or False.Tremors on the earth can also be caused by the eruption of a volcano.

Reema has a piece of modeling clay that weighs 120 g. She first moulds it into a compact cube that has a volume of 60 cm³. Later, she flattens it into a thin sheet. Predict what will happen to its density.

Fill in the blanks. The process of depositing a layer of any desired metal on another material by means of electricity is called _________.

One student says that water exerts pressure on the bottom of the bucket but another student says that water exerts pressure on the sides of the bucket. What would you like to say?