Matter is all around us!
It is anything that has mass and takes up physical space.
Matter
What are the three states of matter?
The three states are solid, liquid, and gas.
What is a pure substance called when it is made of only one kind of atom?
It is called an element (like gold).
What is the name of the process when a solid (like ice cream) turns into a liquid?
It is called melting.
It is energy that comes from sources that regenerate quickly and naturally (like the sun and wind).
Renewable energy
This is the amount of matter in an object.
Mass
Which state of matter has a fixed shape and does not change?
A solid has a fixed shape.
How many different substances are mixed together to make a "mixture"?
Two or more pure substances.
When a liquid turns into a gas (like steam from a boiling pot), what is this called?
It is called evaporation.
If you touch a hot metal spoon and it burns your hand, what type of heat transfer is it?
It is conduction.
This is the amount of space an object occupies.
Mass
What happens to the shape of a liquid when you pour it into a different glass?
It takes the shape of its container.
Is vegetable soup a homogeneous or heterogeneous mixture?
It is a heterogeneous mixture because the ingredients are not distributed evenly.
(you can see the different pieces).
Does solidification happen when the temperature increases or decreases?
It happens when the temperature decreases (it gets colder).
Coal, oil, and natural gas are examples of what kind of energy?
They are non-renewable energy sources.
We use these two units l to measure the volume of juice.
millilitres and litres
Which state of matter can be compressed (squashed) into a smaller space?
A gas can be compressed.
What do we call a mixture where everything is distributed evenly, like orange juice?
It is a homogeneous mixture.
What is the difference between a physical process and a chemical process?
In a physical process, the substance stays the same. In a chemical process, a new substance is formed (like ash from burning wood).
How does heat from the Sun reach the Earth? Answer:
It travels by radiation.
These three lab tools—a beaker, a flask, and a cylinder—all measure this property.
Volume
What do we call the very small particles that are the "building blocks" of all matter?
They are called atoms.
What is a compound?
It is a substance made of two or more elements that can be separated by chemical methods
(like table salt).
Can a chemical process, like rotting or cooking an egg, be reversed?
No, these processes are irreversible (you cannot change them back).
What is a conductor?
A conductor is a material that transfers heat easily, like metal (gold, silver, or copper).