Which statements describe earth? select three options.

it is an outer planet.
it is a terrestrial planet.
it was formed from gas and dust.
it has a thick atmosphere of hydrogen and helium.
it was formed in a debris disk from colliding planetesimals.

It is a terrestrial planet.

It was formed from gas and dust.

It was formed in a debris disk from colliding planetesimals.

Explanation:

Earth is dense, rocky, and small, so it is a terrestrial planet.

The Earth formed , along with the rest of the solar system, about 4.6 billion years ago from a cloud of gas and dust.

Collisions allowed the particles to stick together and make larger particles. These planetesimals acted as seeds for planet formation .

A is wrong. Earth is an inner planet. the third of eight in distance from the Sun.

D is wrong. The boiling points of hydrogen and helium are so low that heat from the Sun would have caused them to escape from Earth's atmosphere long ago.

The answer is B C and E

Explanation:

estuaries are the partially enclosed coastal bodies of brackish water formed at the mouth of sea where river meets an ocean. it is a transition zone between river and sea water so estuaries are influenced to both marine environment such as tides, waves and to riverine such as flow of fresh water and sediments. the mixing of sea and fresh water provide high level of nutrients, making estuaries a high product habitats.

many estuaries suffers degradation from a variety of human activities like erosion from deforestation, overgrazing, overfishing, drainage and eutrophication.

so from the above statement answers will be

1. false as estuaries are formed due to both brackish and freshwater.

2.true, due to high productivity estuaries are breeding ground for many marine species.

3. direct and indirect activities of man that contribute to pollution and deposition of sediments.