Homework part 2- falling objects 17th September

falling objects- stuff you need to know!

In the fourth century B.C., Aristotle stated that an object falls with a speed proportionate to its weight that is, the heavier the object, the faster it falls.

This idea was generally accepted until the 17th century, when Galileo showed that the rate of fall caused by gravity is the same for all objects.

However, on Earth these objects fall at a different rate because of air resistance. In a vacuum, a lump of lead, a feather, and a leaf will fall at the same rate.

This phenomenon was demonstrated by astronauts on the moon, which has no atmosphere. In one experiment, a hammer and a feather were dropped together from the same height; both fell at the same rate and struck the surface of the moon simultaneously.

Homework 17th september

Revision of gravity & space topic homework:

Read the information pages on BBC bitesize following the links below:

Falling:

http://www.bbc.co.uk/schools/gcsebitesize/science/add_ocr_gateway/forces/fallingrev3.shtml

Space:

http://www.bbc.co.uk/schools/ks3bitesize/science/environment_earth_universe/astronomy_space/revise1.shtml

Complete the activities & test on space- print out your test & stick it in your books in the next lesson!

Hand in Monday 24th September

Note:

You may also find it useful to draw some of the diagrams in the notes pages & make some extra notes for your revision

We will be having a test on this topic before half term.

Gravitational forces & the solar system

http://www.bbc.co.uk/schools/ks3bitesize/science/environment_earth_universe/astronomy_space/revise3.shtml

Solar system info from BBC bitesize

http://www.bbc.co.uk/schools/ks3bitesize/science/environment_earth_universe/astronomy_space/revise2.shtml

artificial sateillite info

http://www.bbc.co.uk/schools/ks3bitesize/science/environment_earth_universe/astronomy_space/revise7.shtml

hammer vs feather

http://www.youtube.com/watch?v=KDp1tiUsZw8

zero gravity

http://www.youtube.com/watch?v=OZY8279b7BU

Newtons cannonball

http://www.youtube.com/watch?v=e4T2zh6dN6g

Homework 10th September

Title: Newton & gravity- Why do we measure force in Newtons?

You need to include

1.Who is Sir Isaac Newton?

2.What 3 things that Sir Isaac Newton investigated during his life?

3.Why is the unit of force names after Sir Isaac Newton?

4.Why is it incorrect to say that Newton discovered Gravity?

Deadline: Monday 17th September

Welcome year 9s!

Welcome to your blog!
I will use this to upload any useful stuff from the lesson & homework materials.
Enjoy!