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Science > Term 3 > Flashcards

Term 3 Flashcards

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1
Q

How many J are in 1KJ?

A

1000J

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2
Q

What is Kinetic Energy?

A

The energy an object possesses when it is in motion

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3
Q

If a car has 5000J of kinetic energy and a marble has 4J of kinetic energy, which object has more energy?

A

The Car

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4
Q

When you read a question asking you to calculate something, what is the first thing you need to do?

A

Highlight

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5
Q

How does light travel

A

Light travels through waves

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6
Q

What are the three methods of heat transfer?

A
  1. Conduction
  2. Convection
  3. Radiation
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7
Q

How does sound travel?

A

Through the vibrations of particles

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8
Q

Name 3 examples of sound energy?

A
  1. yelling
  2. Car horn
  3. birds teeting
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9
Q

Name 3 examples of light energy?

A
  1. sunlight
  2. light bulb
  3. torch
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10
Q

Define the law of conservation of energy?

A

Energy can not be created or destroyed

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11
Q

define energy transfer

A

The same type of energy is moved from one object to another

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12
Q

Give an example of energy transfer using an energy flow diagram

A

Go draw it RIGHT NOW!

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13
Q

Define energy transformation

A

When one type of energy changes into another type of energy

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14
Q

Provide an example of an energy transformation

A

When you play softball in HPE, the kinetic energy in the bat when you swing it, is transferred to the ball, making the ball move

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15
Q

Define gravitational potential energy

A

The energy an object possesses due to its height above the ground

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16
Q

Which cyclist has more Gravitational potential energy and which has more Kinetic energy? One at the top of a hill or one at the bottom of a hill?

A

The cyclist at the top of the hill will have more GPE.
The cyclist at the bottom of the hill will have more Kinetic energy.

17
Q

Define Energy

A

The ability to do work

18
Q

How many MJ are in 5KJ’s?

A

MJ -> KJ = divide 1000
5KJ = 0.005MJ

19
Q

What are the three types of potential energy?

A

Chemical
Gravitational
Elastic

20
Q

What is the main energy that comes from food?

A

Chemical

21
Q

The main energy a toaster uses is electrical to produce heat energy. What other (wasted) forms of energy were released?

A

Sound and Light

22
Q

What is the main energy output of a person running?

A

Kinetic

22
Q

Is sound energy a type of kinetic or potential energy?

A

Kinetic

23
Q

Chemical potential -> sound energy

Is this an example of energy transfer or energy transformation

A

Energy transformation

24
Q

GPE <- sound

Is this an accurate energy flow diagram? Explain why.

A

No, the arrow should be going the other way

Science (2 decks)

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