Science Fusion Unit 4 Lesson 4

Which statement best explains why weather systems usually move from west to east across the United States?

• Fronts move from west to east.

• The jet stream moves from west to east.

• Pressure systems form over the Rocky Mountains and move east.

• Weather systems originate over the pacific Ocean and move east.

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What is the water cycle?

• continuous movement of water between the atmosphere, the land, the oceans, and living things,

• is condensed water vapor that is suspended in air

• the cycle of processes by which water circulates between the earth's oceans, atmosphere, and land, involving precipitation as rain and snow, drainage in streams and rivers, and return to the atmosphere by evaporation and transpiration.

• any form of water that falls to Earth from clouds.

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What is Weather?

• the condition of Earth's atmosphere at a certain time and place.

• another factor used in weather reporting

• amount of water vapor in the air.

• air that moves horizontally, or parallel

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What is Temperature?

• measure of how hot or cold something is

• temperaure at which more condensation than evaporation occurs.

• the degree or intensity of heat present in a substance or object, especially as expressed according to a comparative scale and shown by a thermometer or perceived by touch.

• amount of water vapor in the air

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The energy from the sun is created by a process called:

• nuclear fission

• nuclear fusion

• nuclear reaction

• nuclear core

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Energy within the sun is produced through (a)  

• Nuclear fusion

• Nuclear fission

Answer explanation

Energy within the sun is produced through nuclear fusion, where hydrogen nuclei combine to form helium, releasing vast amounts of energy. Nuclear fission, on the other hand, involves splitting heavy nuclei and does not occur in the sun.

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Low-pressure systems bring stormy weather, and high pressure systems bring dry, clear weather

• True

• False

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How do air masses cause weather changes!

• the degree or intensity of heat present in a substance or object, especially as expressed according to a comparative scale and shown by a thermometer or perceived by touch.

• mass and forces the warm air to rise. As the warm air rises, its moisture condenses and forms tall clouds. As fronts move across Earth's surface, they produce changes in the weather. Triangles show the direction that a cold front moves.

• The atmosphere of Earth is the layer of gases, commonly known as air, that surrounds the planet Earth and is retained by Earth's gravity

• A front forms where two air masses meet.

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In unsaturated air, more water evaporates into the air than condenses back into the water

• True

• False

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What happens in a low-pressure system

• Air rises and cools

• sinks and warms

• I don't Know

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