What would happen if earh had only half of its gravitational force

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Conclusions: - Since the Earth's gravity keeps the moon in orbit, it is likely that the moon would move further away especially since it is already moving away at a rate of 3.8cm per year. - If the moon moves far enough, it is also likely that Earth's axis would shift which would cause weather changes, and the Earth would start to spin faster, making our days shorter.

Subtopic

Conclusions: - If Earth's gravity was halved then Earth would not be able to retain all of it's atmosphere. The atmosphere would be thinner and it would be harder to breathe due to less oxygen being held in the atmosphere. - Our atmosphere would slowly thin out, like mars, and would lack enough elements to sustain life and water.

Conclusions: - If gravity were halved, everything would weigh half of what it does now. - In space, there is zero gravity, and if astronauts lose 2 percent of their bone density every month then with half of the gravity, people would lose 1 percent of their bone density every month, therefore, making us slowly weaker. - Plants would grow differently; their roots would be shorter, and the gases and fluids needed would be different, therefore plants may not get all the nutrients they need to grow

What would happen if earth had only half of its gravitational force? By: Zaynub

Life on Earth

Human growth and strength

Astronauts in space have been proven to lose 2 percent of their bone density every week.

Plants

reduction of gravity affects the behaviour of fluids and gases needed for plant growth and development

Gravitropism

Roots grow towards gravity

Shoots of the plant expand

The response plants have to gravity.

Gravity sensing cells in the roots of plants.

Weight

Half gravity = half weight of everything

Earth's Atmosphere

Atmosphere of Mercury

Very thin because most of it has been released into space due to its very weak gravity

The gravity of a planet pulls gases and aerosols of the atmosphere closer to the surface

Due to it's weak gravity, Earth does not have common gases such as hydrogen and helium, which the sun and the Jupiter have

Couldn't be held by the gravity so they evaporated quickly

78% nitrogen, 21% oxygen, almost 1% argon, carbon dioxide, and methane

Gravity on mars is 3.7m/s^2, and is unable to keep hold of an atmosphere

Less than 1% as dense as Earth's atmosphere

Atmosphere had higher density in the past

The Moon

Stabilizes the Earth's axis

Tidal friction prevents Earth from rotating violently

The moon's orbit is expanding about 3.8cm per year

The moon and Earth have strong gravitational impact of eachother

The moon causes tides on Earth

Earth's gravity keeps the moon in orbit.

Prediction: If Earth's gravity is halved, then the moon would move farther away because Earth's gravity is what keeps the moon in orbit, so if the gravity were to be weaker it would not be able to keep the moon as close.