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BIBS Grade 4 UOI > UOI 3 - Simple machines (Advanced) > Flashcards

UOI 3 - Simple machines (Advanced) Flashcards

1
Q

Newton discovered three laws to describe what?

A

Forces and motion.

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2
Q

Newton’s third law of motion describes that for every action, there is a what?

A

Reaction.

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3
Q

You are riding on a sled and the sled suddenly stops and you fly forward.

A

Law #1

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4
Q

Sliding a big box up a ramp in harder than slicing a small box.

A

Law #2

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5
Q

You try to push open a heavy door while you are on rollerblades but you roll backward.

A

Law #3

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6
Q

It takes less force to push an empty grocery cart than a full grocery cart.

A

Law #3

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7
Q

You put your milkshake on the dashboard of your mom’s car but when he car suddenly stops, the drink flies off.

A

Law #1

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8
Q

A ________ is a simple machine that has an arm that pivots on a point called a fulcrum

A

Lever

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9
Q

A _________ consists of a rope wound around a wheel and can make lifting easer

A

Pulley

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10
Q

A _________ is a simple machine that is made up of many levers and rotates on a shaft.

A

Wheel and axle

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11
Q

___________ occurs between any two substances.

A

Friction

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12
Q

An _____________ is a sloping surface used to move objects from one level to another.

A

Incline plane

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13
Q

All forms of energy can be described as forms of _________.

A

Potential and Kinetic energy

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14
Q

If Mr. Dimitri hikes up a mountain, as he climbs higher and higher he gains___________.

A

Potential energy

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15
Q

If Mr. Dimitri ate breakfast before he climbs a mountain, his body would change the
(a)_________ found in his food to (b) ________ so he could climb higher and higher.

A

(a) chemical energy

(b) mechanical energy

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16
Q

What are some examples of a wheel and axle?

A

Doorknob, car, wheels, screwdriver, wrench, gears in watches and clocks, and bicycles.

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17
Q

What are some examples of a wedge?

A

Nail, axe, saw, doorstopper, knife and a pizza cutter.

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18
Q

What is a lever?

A

A board or a bar that rests on a turning point. The turning point is called a fulcrum. An object that a lever moves is called the load. The closer the object is to the fulcrum, the easier it is to move.

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19
Q

What is a pulley?

A

This simple machine is made up of a wheel and a rope. The rope fits on the groove of a wheel. One part of the rope is attached to the load. When you pull on one side of the pulley, the wheel turns and the load will move. Pulleys let you move loads up, down and sideways.

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20
Q

What are some examples of a lever?

A

Bottle opener, scissors, crowbar, seesaw, wheelbarrow, crowbar.

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21
Q

The point on which a lever rests or is supported and on which it pivots.

A

Fulcrum

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22
Q

What are some examples of a pulley?

A

Flagpole, clothes line, ski lift, blinds

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23
Q

What is a screw?

A

A simple machine that is made from another simple machine. It is actually an inclined plane that winds around itself. A screw has ridges and is NOT smooth like a nail. Some screws are used to raise and lower things. They are also used to hold things together.

24
Q

What are some examples of uses for a screw?

A

Used to hold things together and (like in a carjack) they are used to raise and lower things.

25
Q

What is an inclined plane?

A

A simple machine with a flat surface and one end higher than the other. You can use this simple machine to move an object to a higher or lower place.

26
Q

What is force?

A

A push or pull

27
Q

What is a load?

A

The amount you are trying to lift or move

28
Q

What is work?

A

The result of a force moving an object

29
Q

What is a simple machine?

A

A machine made of one or two parts

30
Q

What is a compound machine?

A

A machine made of one or two simple machines.

31
Q

What is a complex machine?

A

A machine made up of many simple and compound machines.

32
Q

Which simple machine is used to move objects to a higher or lower place?

A

inclined plane

33
Q

Which simple machine uses a fulcrum?

A

lever

34
Q

Which simple machine moves thing a distance from place to place?

A

wheel and axle

35
Q

Which simple machine moves objects to hard to reach places?

A

pulley

36
Q

Which simple machine splits things apart?

A

wedge

37
Q

Which simple machine holds objects together?

A

screw

38
Q

What is a wedge?

A

It is used to push two objects apart. It is made up of two inclined planes. These planes meet to form a sharp edge. This edge can split things apart.

39
Q

What is a wheel and axle?

A

The axle is a rod that goes through the wheel. This lets the wheel turn. It s easy to move things from place to place with wheel and axles.

40
Q

What are examples of an inclined plane?

A

ramp and a slide

41
Q

Input force = force with which you _______________

A

Push or pull

42
Q

In order to do ________ on an object, the object must move some _______ as a result of ______.

A

Work, distance, force

43
Q

Output force = force you would need to lift an object _______ an inclined plane

A

Without

44
Q

Work is lost due to ________ between the object and ___________

A

Friction, inclined plane

45
Q

A screw is an inclined plane _________ around a ________

A

Wrapped, cylinder

46
Q

When you increase the ________ the object travels, the _____ force needed to move the object is _____ meaning less ______ can be exerted by the mover to complete the same amount of work

A

Distance, input, decreased, effort

47
Q

An inclined plane works by _________ your input force over a _______

A

Spreading out, distance

48
Q

A lever is a _____ bar that is free to pivot or _____, around a fixed point or fulcrum

A

Rigid, rotate

49
Q

How levers help:

  1. _______ effect of your input force
  2. Changes the ________ of your input force
A

Increases, direction

50
Q

What is a pulley?

A

A grooved wheel with rope or cable wrapped around it

51
Q

When you pull the rope you can change the amount and ________ of your ______ force

A

Direction, input

52
Q

What happens as you add new lengths of rope to a block and tackle?

A

It gets easier to lift

53
Q

What is the scientific term for ramp?

A

Inclined plane

54
Q

When you use a ramp, the _____________ needed to move an object will always be the ____

A

Total amount of work, same

55
Q

What are the 6 kinds of simple machines?

A
  1. Inclined plane.
  2. Wedge
  3. Screw
  4. Lever
  5. Wheel and axle
  6. Pulley

BIBS Grade 4 UOI (1 decks)

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