Earth and space - JSS1 Basic science Past Questions and Answers - page 2

The tilt of Earth's axis causes different parts of the Earth to receive varying amounts of sunlight throughout the year. This variation in sunlight leads to the changing seasons as different regions experience different angles of sunlight and thus varying temperatures.

A solar eclipse occurs when the Moon passes between the Earth and the Sun, blocking the Sun's light from reaching Earth. On the other hand, a lunar eclipse occurs when the Earth passes between the Sun and the Moon, causing Earth's shadow to fall on the Moon, darkening it.

Communication satellites facilitate various forms of communication, such as broadcasting TV signals, providing internet connectivity, enabling global phone calls, and facilitating GPS navigation. They play a crucial role in connecting people worldwide and ensuring seamless communication.

Satellites equipped with weather monitoring instruments provide continuous observations of Earth's atmosphere, oceans, and land surface. These observations help meteorologists track weather patterns, monitor storms, measure temperature, humidity, and wind speed, and predict weather changes accurately.

Earth observation satellites are essential for monitoring environmental changes, including deforestation, urbanization, pollution, and climate change. They provide valuable data for assessing the health of ecosystems, managing natural resources, and informing decision-making in agriculture, disaster management, and urban planning.

Satellites enable scientists to study distant planets, stars, and galaxies, observe cosmic phenomena, and conduct experiments in space. They gather data on cosmic radiation, gravitational waves, and the structure of the universe, expanding our understanding of space and advancing scientific knowledge.