Fossil Fuels

Front

What is an element?

Back

A substance made up of only one type of atom.

Answer explanation

An element is defined as a substance made up of only one type of atom, distinguishing it from mixtures and compounds, which consist of multiple types of atoms or substances.

Front

What is a compound?

Back

2 or more different atoms chemically joined together.

Answer explanation

A compound is defined as 2 or more different atoms chemically joined together, which distinguishes it from single atoms or mixtures of substances. This makes the correct choice the one that accurately describes a compound.

Front

What are mixtures?

Back

Different substances not chemically joined together.

Answer explanation

Mixtures consist of different substances that are not chemically bonded. This distinguishes them from compounds, which are formed when two or more atoms are chemically joined. Thus, the correct choice is 'Different substances not chemically joined together.'

Front

Examples of natural resources: Wood, wheat, fossil fuels; Water, air, soil; Salt, sugar, water; Plastic, nylon, polyester.

Back

Wood, wheat, fossil fuels

Answer explanation

Natural resources are raw materials from nature. Wood, wheat, and fossil fuels are all naturally occurring resources, while plastic, nylon, and polyester are synthetic materials. Therefore, the correct choice is wood, wheat, fossil fuels.

Front

How do you form fossil fuel?

Back

From remains of dead animals and plants over millions of years.

Answer explanation

Fossil fuels are formed from the remains of dead animals and plants that have been subjected to heat and pressure over millions of years, leading to the creation of coal, oil, and natural gas.

Front

Three examples of fossil fuels are:

Back

Coal, oil, and gas.

Answer explanation

Coal, oil, and gas are all fossil fuels formed from ancient organic matter. They are used for energy production, making them distinct from the other options, which include renewable resources and synthetic materials.

Front

Crude oil is composed of what?

Back

A liquid fossil fuel made up of hydrocarbons.

Answer explanation

Crude oil is primarily a liquid fossil fuel, consisting mainly of hydrocarbons, which are compounds made of hydrogen and carbon. This distinguishes it from solids, gases, and synthetic compounds.

Front

Where is crude oil found?

Back

In large underground reservoirs.

Answer explanation

Crude oil is primarily found in large underground reservoirs, where it accumulates over millions of years. The other options, such as the ocean surface, atmosphere, and volcanic rocks, do not contain crude oil.

Front

Mention two exploration activities to locate crude oil.

Back

Seismic Surveying and Rock Core Sampling.

Answer explanation

Seismic Surveying uses sound waves to map underground formations, helping locate oil reserves. Rock Core Sampling involves extracting core samples from the earth to analyze rock properties, confirming the presence of crude oil.

Front

Fraction distillation

Back

The process of separating crude oil into useful fractions.

Answer explanation

Fraction distillation is the process of separating crude oil into useful fractions based on different boiling points, making it essential for refining oil into products like gasoline and diesel.