Question

ANSWER IN BRIEF
a. Why do we need maps?
b. State the importance of the troposphere.
c. State the factors that determine the temperature of a place.
d. What are igneous rocks?
e How does frost cause weathering?

Answer 1

Answer-

a. Why do we need maps?

Ans- We need map to be able to estimate distances on maps because all maps show the earth or regions within it as a much smaller size than their real size. To do this we need to be able to read the scale on a map.

b. State the importance of the troposphere.

Ans- Troposphere is the densest layer of atmosphere that is composed of water vapour, dust particles and many other impurities. Due to this thickness, troposphere absorbs most of the heat radiated by the Earth's surface, thereby, maintaining the temperature of the surface.

c. State the factors that determine the temperature of a place.

Ans- The temperature depends on latitude because when you are closer to the equator it's hotter, but whenever closer to the arctic circles it will be colder.

It also depends on the altitude of the place i.e. height from the sea level. Here the temperature decreases with the increase in altitude.

d. What are igneous rocks?

Ans- Igneous rocks are defined as types of rocks that are formed when molten rock (rock liquefied by intense heat and pressure) cools to a solid state. Lava is molten rock flowing out of fissures or vents at volcanic centres (when cooled they form rocks such as basalt, rhyolite, or obsidian).

e.How does frost cause weathering?

Ans- Weathering is the process where rock I'd dissolved, worn out or broken down into tiny to tiniest pieces. There are 3 types of weathering: a. Mechanical

b. Chemical

c. Organic

Mechanical weathering physically breaks up rock. One example is called frost action or frost shattering. Water gets into cracks and joints in bedrock. When the water freezes it expands and the cracks are opened a little wider. Over time,pieces of rock can split off a rock face and big boulders are broken into smaller rocks and gravels. (This process can also break bricks in buildings.)

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Answer 2

Answer:

A. Map reading and map drawing are important skills to learn in geography. ... Maps also help us to know distances so that we know how far away one thing is from another. We need to be able to estimate distances on maps because all maps show the earth or regions within it as a much smaller size than their real size.

B. The troposphere is the lowest layer of Earth's atmosphere and the site of all-weather on Earth. ... Water vapor it important as it will absorb solar energy and thermal radiation from the surface of Earth, thus regulating the air temperature.

C. The factors that affect the temperature in a specific area are:

• the latitude. height above sea level. distance from the sea. ocean currents. ...
• height above sea level. distance from the sea. ocean currents. prevailing winds.
• distance from the sea. ocean currents. prevailing winds.
• ocean currents. prevailing winds.
• prevailing winds.

D. Igneous rock, or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rock is formed through the cooling and solidification of magma or lava. The magma can be derived from partial melts of existing rocks in either a planet's mantle or crust.

E. One example is called frost action or frost shattering. Water gets into cracks and joints in bedrock. When the water freezes it expands and the cracks are opened a little wider. Over time pieces of rock can split off a rock face and big boulders are broken into smaller rocks and gravel.

Explanation:

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