Science 4- Topic B- Wheels and Levers
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Simple Machines
- Take notes in your notebook with the title Simple machine on a full, clean page of paper
- What is a simple machine- how do simple machines help us?
- What are the 6 types of Simple machines? Can you draw a sketch of each one?
Some Links to Try!
http://engagingstudents.blackgold.ca/index.php/division-ii/sci-d2/science-4/topic-b-wheels-and-levers/
http://www.totally3rdgrade.com/simple_machines.html
http://engagingstudents.blackgold.ca/index.php/division-ii/sci-d2/science-4/topic-b-wheels-and-levers/
http://www.totally3rdgrade.com/simple_machines.html
STEM CHALLENGE- BUILD YOUR OWN CATAPULT
VIDEO PROJECT:
- What materials did you use?
- Show your model & explain- use weight, fulcrum & effort to describe
- What did you find out about Levers?
PULLEYS
What is a pulley? Watch the Video below, and answer the questions on a piece of paper with your partner (one piece of paper per group):
https://www.youtube.com/watch?v=LiarGb_LK10
Watch Video and Answer the following questions with a partner:
1. What are the parts of a pulley?
2. What happens as you add more pulleys?
3. If you increase the amount of pulleys what do you need? (think rope)
4. Complete the sentence:
More pulleys equals (less or more) effort?
5. Where can you find examples of pulleys in real life? Try to list 5 examples!
6. Draw a picture of a Pulley
What is a pulley? Watch the Video below, and answer the questions on a piece of paper with your partner (one piece of paper per group):
https://www.youtube.com/watch?v=LiarGb_LK10
Watch Video and Answer the following questions with a partner:
1. What are the parts of a pulley?
2. What happens as you add more pulleys?
3. If you increase the amount of pulleys what do you need? (think rope)
4. Complete the sentence:
More pulleys equals (less or more) effort?
5. Where can you find examples of pulleys in real life? Try to list 5 examples!
6. Draw a picture of a Pulley
Now... BUILD A PULLEY SYSTEM!
http://carrotsareorange.com/wp-content/uploads/2014/07/make-a-pulley.jpg
What did you find out?
http://carrotsareorange.com/wp-content/uploads/2014/07/make-a-pulley.jpg
What did you find out?
Wheels & Rollers
Rollers
Key Terms: Friction, Resistance, Circular Prism
What is a roller?
Significance of the roller?
What are some real life examples of rollers?
Key Terms: Friction, Resistance, Circular Prism
What is a roller?
- A roller is an object shaped like a cylinder. It rotates along its rounded edge in order to move larger objects and reduce the resistance caused by friction. Unlike a wheel it does not have an axle.
Significance of the roller?
- Before the invention of the wheel rollers were used to move heavy objects from one location to another. often times multiple rollers were set up across the ground and a heavy object was pushed
What are some real life examples of rollers?
- toilet paper rolls, paint roller, pencil crayons, etc.
- Can you think of other real life examples of rollers?
WHEELS
Key Words:
What is a wheel?
What are some real life examples of machines that use wheels?
Key Words:
- friction, force, effort, load, fixed,axle, wheel, roller, pulley, screw, gears
What is a wheel?
- Wheels come in many different shapes and sizes. They are also often used to help achieve different goals. A wheel are not to be confused with a roller which does not use an axle. A wheel is a circular object that either spins around a fixed (does not spin) axle or is fixed to an axle which case the axle itself spins. This machine becomes more complicated when gears are included into a drive system. A wheel and axle moves loads from one place to another or in the case of a pulley they are used to lift loads up and down. A screw is also similar to a wheel, but it is often used to stop movement and hold a load in place.
What are some real life examples of machines that use wheels?
- Cars, wheel barrows, conveyer belts, windmills, door knob, and more...
WHEEL & AXLE CARS- link
Gears, Gears, Gears!!
Beveled Gears or 90 Degree Gears
http://science.howstuffworks.com/transport/engines-equipment/gear4.htm
http://science.howstuffworks.com/transport/engines-equipment/gear4.htm
Simple Machine Sites:
Brain Pop.Jr.- Simple Machines & Engineering Design
Simple Machines Matching Game
SIMPLE MACHINES EXPLORATION