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1 Science W.C I have been talking my dogs on long walks during lockdown. I hope you are still spotting those WOW moments on your walks. I have been looking at trees and marvelling at their height! Stand under a tree and just look up. Choose a branch and follow it to its end! Lots of trees are older than you and some are even older than me! I have realised that I need to get better at identifying trees so I have ordered a book to help me. When we all get back to school you can test me! How will you know if I am correct? I have attached a link to a sheet to help you with your tree spotting. Maybe you could take photos like I have and then identify the tree at home. Happy spotting!! Mrs Tinley Do you know what type of trees these are?

2 Gravity This week is Gravity week. Let s see if we can answer some of these questions! 1. Have you ever wondered why a bouncy ball drops down instead of falling up or sideways? 2. Have you seen men walking on the moon? Do they walk or float? I wonder why? 3. Have you heard of Isaac Newton? Do you know why he is always linked to a certain fruit? All about gravity:

3 Science Forces Science Year 5 Forces Gravity Lesson 2

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5 Aim Aim To explore the effect that gravity has on objects and how the first theory of gravity was developed. Success Criteria Statement I can explain 1 Lorem the effect ipsum of dolor gravity sit on amet, unsupported consectetur objects. adipiscing elit. Statement I can explain 2 Isaac Newton s role in developing a theory of gravity. I can accurately measure the force of gravity pulling on objects. Sub statement Success Criteria

6 Drop a bouncy ball. What does it do? Talk to your family. Why does the bouncy ball fall down rather than falling up, sideways or staying still. Look at the ideas on the right. Which idea do you agree with? Falling Down There is no air resistance acting on the ball, so it can go straight down. The ball falls downwards because gravity is pulling it down. The ground exerts a force on the ball so the ball is magnetically attracted to the ground. The bouncy ball falls downwards because it is heavy. If it were lighter, it would float away.

7 Falling Down Did you agree with this boy? Gravity is the force that means that objects are pulled towards the centre of the Earth. Gravity pulls the bouncy ball downwards so it falls down. All objects exert a gravitational pull. However, the strength of an object's gravitational pull depends on its mass. The Earth is a huge object with an extremely high mass, so its gravitational pull is very strong. The force of gravity keeps us on the ground. Gravity also causes objects to fall down if they are dropped.

8 Discovering Gravity This is Isaac Newton. Do you have any idea why he is pictured next to an apple tree?

9 Weight and Mass People often use the words weight and mass to mean the same thing. Mass is a measure of the amount of stuff inside an object, and is measured in kilograms (kg). Weight is actually a measure of the strength of gravity acting on an object. It is measured in newtons (N). The weight of an object is caused by gravity pulling it down. Objects with more mass have a greater weight, as the force of gravity pulls them down more strongly.

10 Weight and Mass An object's mass will stay the same even if it is in a place with weaker gravity, like the Moon. However, an object s weight can change! If the object were on the Moon, although it would have the same mass, it would weigh much less as the gravity would not be pulling it down as strongly. The Moon s gravity is much weaker than the Earth s.

11 Weight and Mass Jupiter is a much bigger planet than Earth so it has a stronger gravitational pull. Although an object would have the same mass on Jupiter as anywhere else, it would weigh much more due to the gravity pulling it more strongly.

12 Weight and Mass Remember Mass is how much matter (or stuff ) is inside an object. It is measured in kilograms (kg). Weight is how strongly gravity is pulling an object down. It is measured in newtons (N).

13 Measure the Force of Gravity We can measure measure the weight and mass of different objects. The weight of an object is measured using a newton meter. Remember, weight is a measure of how strongly gravity is pulling on the object. The mass of an object is measured using a set of scales. Remember, mass is a measure of how much matter (or stuff ) is in the object. You can find an object s weight by placing the object in a bag and hanging the bag from the newton meter to measure how strongly gravity is acting on the object.

14 Finding a Link Gravity pulls objects down with a force of approximately 1N for every 100g. So if an object weighs 200g, gravity will pull it down with a force of 2N. If an object weighs 1kg, gravity will pull it down with a force of 10N. If an object weighs 10 Kg gravity will pull it down with a force of?n

15 Aim Aim To explore the effect that gravity has on objects and how the first theory of gravity was developed. Success Criteria Success Criteria Statement I can explain 1 Lorem the effect ipsum of dolor gravity sit on amet, unsupported consectetur objects. adipiscing elit. Statement I can explain 2 Isaac Newton s role in developing a theory of gravity. Sub statement

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