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| Pregunta | Respuesta |
| What is an inclined plane? | A simple machine that reduces the effort needed to lift a load by increasing the distance it acts. |
| What is a ramp? | An inclined plane used to help lift an object. |
| What is a wedge? | A double inclined plane, such as a knife or an axe. |
| What is a screw? | A spiral-shaped inclined plane. |
| What does a ramp do? | A ramp uses a smaller force over a longer distance in loading objects. |
| What is a pitch? | The distance between adjacent threads on a screw. |
| What are wedges used for? | Wedges are used to split objects because they change the direction of the force and increase its size. |
| What are some examples of wedges? | Pins,needles, nails and doorsteps are all examples of wedges. |
| List some examples where zips can be found: | Clothing, purses, sleeping bags, suitcases, handbags and pencil cases are just some examples where zips are found. |
| What does a zip consist of? | A zip consists of two sets of interlocking teeth and is very strong when fastened. |
| How many wedges does the zipper slide consist of? | The zipper slide is a collection of three wedge. |
| What are the three wedges? | -A central wedge that unlatches the teeth as the zip is undone -2 side wedges that force the teeth together when the zip is done up. |
| What is a screw designed to do? | A screw is a simple machine designed to cut through another substance. |
| What do wood screws do? | Wood screws can cut through timber. |
| What are boat propellers? | Boat propellers are screws that cut through the water. |
| What are aircraft propellers? | Aircraft propellers are screws that cut through the air. |
| What does a screw with a small pitch do? | A screw with a small pitch is easy to screw into a piece of wood, but to do so it must be turned many times with a screwdriver. |
| What does a screw with a large pitch do? | A screw with a large pitch takes fewer turns of a screwdriver to be inserted into wood, but requires more force than the previous screw. |
| What does the screwdriver do? | The screwdriver turns a screw into a piece of wood. |
| What is a thread? | The spiral inclined place around a metal screw is called the thread. |
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