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UNIT 5 MATTER AND ENERGY Natural Science 6th level
WHAT IS MATTER?
Everything around us is made of matter.
All matter has two properties we can measure:
• The mass of a substance is the quantity of matter that it is made
of. We measure mass in kilograms.
• The volume of a substance is the quantity of space that it
occupies. We measure volume in litres.
The density of a substance is the relationship between its mass and its
volume.
WHAT IS ENERGY?
Energy transforms matter. It is also needed to perform and do
activities. For example, a plant uses energy from the Sun to make food
and grow.
We obtain energy from different sources:
• Non-renewable energy sources, such as oil, come from the Earth.
Their supply is limited and they cannot be replaced.
• Renewable energy sources, such as the Sun, will never run out.
Types of energy
There are different types of energy:
-Electrical energy
-Thermal energy
-Mechanical energy
-Chemical energy
-Light energy
-Nuclear energy
HEAT AND TEMPERATURE
Heat is a type of energy that is transferred from a hot substance to a
colder one.
We talk about temperature when we measure how hot or cold a body is.
We measure temperature with a device called a thermometer.
LIGHT
Light is a type of energy that is emitted by luminous objects and
substances. We use our sense of sight to perceive it. Because of light we
can see the shape, size and colour of things.
Light travels in straight lines from the light source.

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Natural science 6th unit 5

  • 1. UNIT 5 MATTER AND ENERGY Natural Science 6th level WHAT IS MATTER? Everything around us is made of matter. All matter has two properties we can measure: • The mass of a substance is the quantity of matter that it is made of. We measure mass in kilograms. • The volume of a substance is the quantity of space that it occupies. We measure volume in litres. The density of a substance is the relationship between its mass and its volume. WHAT IS ENERGY? Energy transforms matter. It is also needed to perform and do activities. For example, a plant uses energy from the Sun to make food and grow. We obtain energy from different sources: • Non-renewable energy sources, such as oil, come from the Earth. Their supply is limited and they cannot be replaced. • Renewable energy sources, such as the Sun, will never run out. Types of energy There are different types of energy: -Electrical energy -Thermal energy -Mechanical energy -Chemical energy -Light energy -Nuclear energy HEAT AND TEMPERATURE Heat is a type of energy that is transferred from a hot substance to a colder one. We talk about temperature when we measure how hot or cold a body is. We measure temperature with a device called a thermometer.
  • 2. LIGHT Light is a type of energy that is emitted by luminous objects and substances. We use our sense of sight to perceive it. Because of light we can see the shape, size and colour of things. Light travels in straight lines from the light source.