7th Science - 1st Semester Final Exam

Front

What are Index Fossils?

Back

Index Fossils are fossils of organisms that were only around for a short period of time, have a wide distribution, and are found in many rock layers. They help scientists determine the age of rock layers.

Front

What is the primary reason Earth stays in orbit around the sun?

Back

The primary reason Earth stays in orbit around the sun is the gravitational force between the sun and Earth.

Front

How long does it take the moon to complete one orbit around the Earth?

Back

It takes the moon approximately 28 days to complete one orbit around the Earth.

Front

How do gas giants differ from terrestrial planets in terms of gravity?

Back

Gas giants have more gravity compared to smaller terrestrial planets, which helps them retain gases.

Front

During which phase of the moon does a lunar eclipse occur?

Back

A lunar eclipse occurs only during a Full moon.

Front

What is the definition of gravitational force?

Back

Gravitational force is the attraction between two objects with mass, which causes them to pull towards each other.

Front

What is the significance of the term 'lunar eclipse'?

Back

A lunar eclipse is an event that occurs when the Earth passes between the sun and the moon, causing the Earth's shadow to cover the moon.

Front

What is the role of gravity in the solar system?

Back

Gravity keeps planets in orbit around the sun and moons in orbit around planets.

Front

What are terrestrial planets?

Back

Terrestrial planets are rocky planets that are closer to the sun, including Mercury, Venus, Earth, and Mars.

Front

What are gas giants?

Back

Gas giants are large planets that are primarily composed of gases, such as Jupiter and Saturn.