Fossil Fuels

Q.

What is the importance of fossils as an evidence of evolution?

Q. What are fossils? How do they act as an evidence for organic evolution?

Q.

The preserved traces of living organisms are known as:

1. Humus

2. Crust

3. Skeleton

4. Fossils

Q.

Petroleum is a result of millions of years of decomposition of plant fossils under the earth.

1. True

2. False

Q. What are fossil fuels and how are they formed? Describe, in brief two methods of determining the age of fossils

Q. Mention whether the following statements are True (T) or False (F).
(ii) CO2 and methane are directly contributing to global warming. (T/F)

Q. What do fossils tell us about the process of evolution?

Q. Which of the following sources of energy can be a substitute for fossil fuels?

1. Solar energy
2. Wind energy
3. LPG
4. Tidal energy

Q. What are fossils. How do studies of fossils support evidences for organic evolution.

Q.

How do scientists utilise the information about fossils?

Q. Question 29
Although coal and petroleum are produced by degradation of biomass, yet we need to conserve them. Why?

Q.

Give the composition of natural gas.

Q. Write the name of various types of coal and give the percentage of carbon in each one of them?

Q.

What is petroleum?

Q. Statement 1: Fossils are preserved traces of living organisms.

Statement 2: Fossils which are found closer to the surface are more recent than the fossils in deeper layers.

1. Only statement 1 is correct.
2. Only statement 2 is correct.
3. Both the statements are correct.
4. Both the statements are incorrect.

Q.

Fossils are common in which type of rocks?

1. Sedimentary

2. Igneous

3. Metamorphic

4. Mudrock

Q.

Choose the source of energy different from others

1. Natural gas

2. Hydropower

3. Geothermal power

4. Ocean waves

Q.

Petroleum was formed from organisms living in the _______.

1. sea
2. desert
3. soil
4. mountain

Q. Haow does Carbon Monoxide affect the air?

Q. Fossil fuels are formed from:

1. Burning of wood
2. Volcanic eruptions
3. Underground water
4. Remains of dead living organisms

Q. How is coal and petroleum formed?

Q. What are greenhouse gases?

Q.

During the winter season, a person sleeps in a closed room with burning firewood. He experiences nausea and giddiness. The emission of which of the following gas is responsible for it?

1. Sulphur dioxide

2. Carbon dioxide

3. Carbon monoxide
4. Nitrous oxide

Q.

Why should fossil fuels like coal and petroleum be used judiciously ?

Q. Most minerals are _____.

1. Renewable
2. Non-renewable
3. Convertible
4. None of these

Q.

The main constituent of biogas is

1. methane

2. carbon dioxide

3. hydrogen

4. hydrogen sulphide

Q. Which are the methods were used to study human evolution? [2 MARKS]

Q. The common source of energy in villages is

1. Coal
2. Wood & dung
3. Petrol
4. Both A and B

Q.

Write down five renewable sources of energy.

Q. About 70% of total global carbon is found in

1. Grasslands ecosystems
2. Agroecosystems
3. Forests
4. Oceans