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Key Stage 3 Science

QuestionAnswer
list the planets in our solar system in terms of distance from the sun starting with the nearest planet to the sun Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune
Describe the Heliocentric and Geocentric models of our solar system
What causes the distinct changes in weather in countries in Europe and compare the conditions of Summer and Winter in Europe
What are the ends of a bar magnet called and how does the end of a bar magnet interact with each other The ends of a bar magnet are called the north pole and the south pole. The ends of bar magnets interact based on the following principles: Like poles repel each other and unlike poles attract each other
What is a field in Physics and describe a magnetic field and state what is needed to find the shape of the magnetic field of a bar magnet A field is a region or space where a non-contact force has an effect. A magnetic field is the space where a magnetic force has an effect We can use iron filings or a small compass to find the shape of the magnetic field of a bar magnet
What is the Earth’s Gravitational field and gravitational field strength and how is it represented
State the equation that connects weight, mass and gravitational field strength. Then complete the following calculations: i)W = ?, m = 50kg and g = 10N/kg ii) W = 300N, m =? and g =10N/kg iii) W = 74N, m = 20kg and g = The equation that connects weight, mass and gravitational field strength is weight = mass x gravitational field strength (W = m x g). i)W = m x g W = 50kg x 10N/Kg W = 500N ii) m = W/g m = 300N/ 10N/Kg m = 30Kg iii) g = W/m g = 74N/20Kg g = 3.7N/kg
How is the force of gravity that attracts two objects changes with distance and with mass
Define mass, weight and gravitational field strength, state their units and Explain with reason if weight or mass of an object changes or stays the same as it goes from one planet to another
Define a light year. Roughly how far is a light year in km A light year is the distance light travels in 1 year. A light year is roughly 10 million million km
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