Test: Basic Science- 1 - Class 8 MCQ

The seeds of plants growing near water or in water are dispersed by water. The seeds of these plants are light in weight. The lotus has spongy fruits that are dispersed through water.

The leaf is the part of the plant that produces food for the plant by the process of photosynthesis. The leaf has chlorophyll which gives the green color to the leaf. Chlorophyll makes food for the plant using carbon dioxide, water, nutrients, and sunlight.

Plants are known as autotrophs because they can use energy from the sunlight to make their own food. When a plant uses sunlight, water, and carbon dioxide to make glucose which is a form of sugar that plants require in order to sustain. They also release oxygen during the process of photosynthesis.

Begonia like any other flower reproduces asexually. They produce fruits which contain seeds. They are capable of propagating from a portion of the leaf.

As there is more and more industrialisation, we are constructing taller buildings, factories and roads. The continuous process of building results in disposition of large quantities of waste formed by it in the landfill areas. To construct a structure requires land and to fulfill the land requirement the landfilled areas where the garbage is dumped are used in order to construct new industries and building.

Pollution Under Control certificate under Central Motor Vehicles Rule, 1989. The test assesses the emission of a vehicle and check it meets the standards set for pollution control.

Energy star is an initiative by the governments that help the consumers to identify the energy-efficient products and help them save money and reduce greenhouse gas emissions. Energy star is a program run by the U.S. Environmental Protection Agency and U.S. Department of Energy.

Motor Vehicles required fuels to run. The fuels used are petrol and diesel which are non- renewable resources. Thus, conserving these natural resources should be the aim of each and every citizen. Thus, in the current situation asking the father to turn off the engine at red lights in order to conserve fuel is one such method.

An inert gas is a gas that does not usually react chemically with other things. They are the most stable elements as they have maximum number of valence electrons in their outer shell.
Examples of inert gases are Argon, Neon, Xenon and Helium. They are often used in welding and sealing.

Ernest Rutherford was a New Zealand-born British scientist, who won the Nobel Prize in Chemistry in 1908, for his work on nuclear physics, and for the theory of the structure of the atom.
In 1911, he performed the Alpha particle scattering experiment or the elastic scattering using a gold foil, which led to the birth of the nuclear model of an atom and was a major step towards how we see the atom today.