Gravity

Writing Focus:I am learning to support the main ideas with relevant
detail and elaboration. Reading Focus: I am learning to locate the
main idea within the text.

Gravity is a force that attracts all objects towards each other. Gravity decreases as
distance between the objects increases.  Isaac Newton was the first to come up with the
idea that all objects are attracted towards each other by gravity.

As a satellite moves around the Earth in a circular orbit, the direction of the force of
gravity is always towards the centre of the Earth. However, if the satellite is given speed
in any direction horizontal to the surface of the Earth, it will travel further before it hits
the Earth.

When does gravity decrease?  Gravity decreases as distance between the
objects increases.

When does the force of gravity become noticeable?  Gravity only becomes
noticeable if one (or both) of the objects has a lot of mass, such as the Earth.

Gravity disappears when you are above the atmosphere. True or False?
Gravity doesn’t disappear just because you are above the atmosphere. Even
if an object is high above the Earth’s atmosphere, there will still be a strong
force of gravity pulling it towards the centre of the Earth

According to the text, how long does it take the International Space Station
(ISS) to orbit Earth?  
Astronauts and (ISS) are also both travelling horizontally at 28,000 km/h. As
they fall towards the ground, they travel so fast horizontally that they miss
the Earth altogether and orbit the Earth once every 90 minutes.

Who first stated that all objects are attracted towards each other by gravity?
Isaac Newton was the first person to state that all objects are attracted
towards each other.

Find six words in the text that have a suffix.  (Orbit-ing), (fail-ed), (weightless-ness),(attract-ed),(notice-able)and (horizontal-ly).