Physics 3 Gravity and Space

C/WEarth, Moon & Sun27-Nov-15 Aims:-4 know how they move in space 5 describe their path across the sky 5 describe their path across the sky 6 explain the phases of the Moon Starter – 5 minutes Starter – 5 minutes How does the laptop look to John? How does the laptop look to John?

Animation 1 Day and Night

Copy notes – 5 minutes Earth turns on its axis Earth turns on its axis This causes day and night This causes day and night It takes 24 hours It takes 24 hours The Sun seems to move across the sky The Sun seems to move across the sky It is always towards the South It is always towards the South It appears in the East in the morning It appears in the East in the morning It disappears in the West at night It disappears in the West at night It is high up at mid-day It is high up at mid-day It is lower in winter It is lower in winter

Copy diagrams – 10 minutes Page 133 (top) Page 133 (top) Page 135 (top) Page 135 (top)

Animation 2 Seasons (open seasons.swf)

Copy notes – 5 minutes Earth orbits the Sun, like all planets Earth orbits the Sun, like all planets It takes 1 year (365¼ days) It takes 1 year (365¼ days) The rotation axis is tilted The rotation axis is tilted It is always tilted the same way It is always tilted the same way This causes the seasons This causes the seasons The North is tilted towards the Sun in June The North is tilted towards the Sun in June This is our summer time This is our summer time The South is tilted away so they have Winter The South is tilted away so they have Winter

Copy diagrams – 10 minutes Page 134 (middle) Page 134 (middle) Page 134 (bottom-left) Page 134 (bottom-left)

Animation 3 Moon Phases

The Moon – 10 minutes The Moon orbits the Earth in 28 days The Moon orbits the Earth in 28 days It looks different each day of the month depending on how much of it is lit up by the Sun It looks different each day of the month depending on how much of it is lit up by the Sun Copy diagram on top of p136 Copy diagram on top of p136

Homework Look at the moon tonight Look at the moon tonight Draw the shape of the moon in your book (with a proper title and heading of course) Draw the shape of the moon in your book (with a proper title and heading of course) Extra: Extra: Look at the moon every hour until bedtime Look at the moon every hour until bedtime How does it move across the sky? How does it move across the sky? Project: Project: Measuring the size of the Earth Measuring the size of the Earth

Are You On Target Today? Aims:-4 know how they move in space 5 describe their path across the sky 5 describe their path across the sky 6 explain the phases of the Moon

C/WSolar System27-Nov-15 Aims:-4 name the planets in order 5 know some details about each planet 5 know some details about each planet 6 describe the other parts of the solar system Starter – 5 minutes Starter – 5 minutes How do we know the Earth goes round the Sun and not the other way round? How do we know the Earth goes round the Sun and not the other way round?

Video Solar System

Questions – 5 minutes 1. Dfghlk 2. Dfgh 3. Dfgh 4. Dfgh 5. dfgh

Travel Brochure – 25 minutes Pretend you are a future travel agent selling holidays in space Pretend you are a future travel agent selling holidays in space Make a brochure for a trip to your choice of planet Make a brochure for a trip to your choice of planet Remember to tell us how long the journey is, what the ‘weather’ is like, and any sights of special interest on your planet Remember to tell us how long the journey is, what the ‘weather’ is like, and any sights of special interest on your planet

Homework Complete the Trends in the Solar System worksheet Complete the Trends in the Solar System worksheet Extra: Extra: What are comets? What are comets? Why have we sent space probes to collect dust from inside comets? Why have we sent space probes to collect dust from inside comets?

Are You On Target Today? Aims:-4 name the planets in order 5 know some details about each planet 5 know some details about each planet 6 describe the other parts of the solar system

C/WGravity27-Nov-15 Aims:-4 know gravity acts to the Earth’s centre 5 know gravity keeps things in orbit 6 describe how gravity changes in space 6 describe how gravity changes in space

Starter – discuss with neighbour Is there any gravity in space? How do you know? What about on the Moon?

Copy notes – 5 minutes Gravity is a force Gravity is a force Everything is pulled towards the centre of the Earth by gravity Everything is pulled towards the centre of the Earth by gravity Draw and label diagram p14 (top-right) Draw and label diagram p14 (top-right) Gravity pulls every object towards every other object Gravity pulls every object towards every other object Usually the force is tiny … Usually the force is tiny … … but the Earth is huge so its gravity is strong … but the Earth is huge so its gravity is strong

Calculating Weight Weight is the force the Earth pulls on you Weight is the force the Earth pulls on you Every 1kg is pulled by a force of 10N Every 1kg is pulled by a force of 10N Work out the weight of: Work out the weight of: a) A 1kg bag of sugar b) A 20kg dog c) A 75kg teacher d) A 100g apple Now do purple box p15 Now do purple box p15

Extension 1 Each planet has different gravity Each planet has different gravity The Moon’s gravity is only 1.6N/kg The Moon’s gravity is only 1.6N/kg 1. Calculate the weight of a 50kg student on: the moon the moon Mars (see p16) Mars (see p16) Jupiter Jupiter Pluto Pluto 2. Is there any gravity on the Moon? 3. Is there any atmosphere on the Moon? Why?

Demo Orbits

Extension 2 1. What keeps the bung in the demo going in a circle? 2. Why does the bung in the demo not move towards the hand? 3. What keeps the Earth orbiting the Sun? 4. What keep the Moon orbiting the Earth? 5. Why do they not pull towards each other?

Why are astronauts weightless? QWhy does the scale register on Earth? AThe pull of the Earth on you squashes the springs inside QWhy does a scale not register in orbit? AThe pull of the Earth on you keeps you going in a circle. None is left over to squash the scale’s springs.

Homework Bring in some junk for model-making next time (cardboard boxes, egg boxes, thin wire, string, tin-foil, coloured paper …) Bring in some junk for model-making next time (cardboard boxes, egg boxes, thin wire, string, tin-foil, coloured paper …) Extra: Extra: Imagine you are on a trip straight from Earth to the Moon. How does the force of gravity on you change? Remember both the Earth’s and the Moon’s gravity act on you, and that they are different strengths. Imagine you are on a trip straight from Earth to the Moon. How does the force of gravity on you change? Remember both the Earth’s and the Moon’s gravity act on you, and that they are different strengths.

Are You On Target Today? Aims:-4 know gravity acts to the Earth’s centre 5 know gravity keeps things in orbit 6 describe how gravity changes in space 6 describe how gravity changes in space

C/WSatellites27-Nov-15 Aims:-4 know the uses of satellites 5 describe satellite orbits 6 explain how GPS works 6 explain how GPS works Starter – 5 minutes Starter – 5 minutes Which planets are these? Which planets are these? RamsUS rantCurry me

Copy notes – 5 minutes A satellite is anything that orbits something else A satellite is anything that orbits something else The Moon is a satellite (of Earth) – it is a natural satellite The Moon is a satellite (of Earth) – it is a natural satellite Artificial satellites are used to do many different jobs such as weather forecasting, communication, and spying Artificial satellites are used to do many different jobs such as weather forecasting, communication, and spying

Geostationary Demo Run geosync.swf

Copy notes – 2 mins Geostationary orbits are used for TV, GPS signals and some weather satellites Geostationary orbits are used for TV, GPS signals and some weather satellites Polar orbits are used for spying, mapping and weather Polar orbits are used for spying, mapping and weather GPS systems time the signals from several satellites to work out your exact position GPS systems time the signals from several satellites to work out your exact position

Describe Choose a satellite job (e.g. weather, spying, TV …) – give it a name Choose a satellite job (e.g. weather, spying, TV …) – give it a name Describe what it needs to do its job (e.g. power, aerial for communication, camera, other sensors, special orbit …) Describe what it needs to do its job (e.g. power, aerial for communication, camera, other sensors, special orbit …) Sky TV Satellite - ASTRA Aerial to receive TV signal Aerial to receive TV signal Aerial to broadcast the signal Aerial to broadcast the signal Solar cells to power the satellite Solar cells to power the satellite Geostationary orbit Geostationary orbit

Build Build your satellite from junk!

Homework Revise for test Revise for test

Are You On Target Today? Aims:-4 know the uses of satellites 5 describe satellite orbits 6 explain how GPS works 6 explain how GPS works