Teacher Notes Use this PowerPoint when teaching your class about different forces (push and pull). Curriculum links: Year 2 – Physical sciences. A push or a pull affects how an object moves or changes shape. Best used in conjunction with the Push and Pull Resource Pack.Push and Pull Resource Pack

Symbols I do: my turn to talk. This is the explanation section of our lesson where you are required to listen. We do: this is where we discuss or work on the concepts together. You do: your turn to be involved. You may be working in a group or on an activity individually.

Push and Pull Forces

What is a Force? A force is a push or pull needed to start an object moving or, more accurately, to make things change their motion. When a force is applied to an object the following can happen: - a stationary object moves - the speed of an object increases - an object changes direction - a moving object stops moving

Push or Pull? Stand up and mime each of the following actions. As a class, discuss and decide if you are pushing or pulling. Or can you do both? closing a door kicking a ball using a screwdriver

What is a Push? A push is a force moving something away from you.

What is a Pull? A pull is a force moving something towards you.

Push and Pull Review 1.Complete the Push and Pull Forces worksheet - draw arrows to show the push and pull force on each picture.Push and Pull Forces worksheet 2.Complete the Push and Pull Picture and Sentence Sort worksheet - cut and paste images of pushes and pulls.Push and Pull Picture and Sentence Sort worksheet

Playground Forces In pairs, look at four different pieces of equipment you like to play on in the playground. Each have a turn and discuss what forces are being used. Complete the Playground Forces worksheet.Playground Forces worksheet

What is Friction? Friction is a force that happens when objects rub against one another. When we rub our hands together to warm them up, or slide down a slide, or push a toy car along, we create friction. Different types of surfaces create different amounts of friction. Some create a lot of friction, whereas some create only a little friction. The weight of an object also impacts the amount of friction.

Toy Train vs Real Train Imagine you push a toy train across the floor of your classroom. It doesn't take much effort or force, because the toy is light. Now, imagine you try to push a real train. You can't do it because the force of friction between the train and the train track is more intense. The heavier the object, the stronger the friction.

Science Inquiry Task - Friction Complete first Push and Pull Inquiry Task about friction.Push and Pull Inquiry Task

Why Do Some Things Float? As a class, discuss the following questions: - - Why do some things float and some sink? - Why can an ocean liner float? - Why does a paper clip sink?

Buoyancy (Floating) Whether an object floats or sinks is determined by the balance between the downward pull of gravity and the upward push of the water. This upward pushing force is called buoyancy. Push of water Pull of gravity

Buoyancy (Floating) If the downward pull of gravity and upward push of water are in balance, the object will float. If the weight force down is larger than the upward push of the water on the object, then the object will sink. Push of water Pull of gravity

Investigating Buoyancy Put a large ball (a basketball, netball or soccer ball) into a large tub filled with water. If you push down on the ball and then let it go, what happens? Why do you think this happens? Share your ideas.

Science Inquiry Task - Floating Complete second Push and Pull Inquiry Task about floating.Push and Pull Inquiry Task

What is Gravity? Gravity is a force that pulls us to the ground. If you drop a ball, it falls to the ground because of gravity. All objects have gravity. Some objects (like the Sun and the Moon) have a lot more gravity than others. If you drop two different objects from the same height, they will fall at the same speed and land at the same time. This is called the equivalence principle. We know that planes and helicopters have engines that help them stay in the air. So how does a parachute stay in the air for so long?

Pull of gravity A parachute catches the air and supports the weight of the parachutist. Push of air

Parachute Technology Task Complete the Parachute Investigation and Technology Task.Parachute Investigation and Technology Task

What is Magnetism? Magnets are surrounded by a magnetic force, called a magnetic field. This is invisible to the human eye. If a magnetic object comes close to a magnetic field, it is pulled towards the magnet and will attach itself to it. Magnetic objects are those which contain iron, nickel or cobalt. All other objects are non-magnetic. Because the core of the Earth is made up of iron and nickel, it is actually one, gigantic magnet!

Attract or Repel? All magnets have a north pole and a south pole. When the opposite poles on a magnet are placed near each other, they attract. When the like (same) poles on a magnet are placed near each other, they repel.

Exploring Magnets Task Complete the Exploring with Magnets task.Exploring with Magnets task

Summary A force is a push or pull needed to start an object moving or, more accurately, to make things change their motion. Some forces include: -friction -buoyancy -gravity -magnetism.

Revision Complete the Push and Pull Vocabulary worksheet.Push and Pull Vocabulary worksheet Complete the Fun with Forces worksheet.Fun with Forces worksheet Complete the Which Force Is That? worksheet.Which Force Is That? worksheet