1A Substances
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What are the tiny particles that matter is made of?
Atoms
What do we call the temperature at which a liquid becomes a gas?
Boiling point
Which process changes a liquid into a gas?
Evaporation/Boiling
Which process changes a gas into a liquid?
Condensing
The law of ‘Conservation of matter’ is…
Matter cannot be created or destroyed (the number of atoms remain the same)
Which process changes a liquid into a solid?
Freezing
Which state of matter has no fixed shape or volume?
Gas
Which state of matter has no fixed shape but does have a fixed volume?
Liquid
What do we call anything that takes up space and has mass?
Matter
Which process changes a solid into a liquid?
Melting
What do we call the temperature that causes a solid to become a liquid?
Melting point
Which state of matter has a fixed shape and volume?
A solid
What are the 3 states of matter?
Solid, liquid and gas.
A substance has a melting point of -1,200oC and boiling point of -5oC. What state will it be at room temperature?
Gas
What happens to the number of atoms as a liquid becomes a gas?
Nothing. They stay the same number.
How do the atoms move in a solid?
They vibrate around a fixed point.
How do the atoms move in a liquid?
The atoms slide past each other.
How do the atoms move in a gas?
Atoms move freely and randomly at high speeds.
Which part of a scientific report should a conclusion always link to?
The aim
Which variable is your ‘measured’ results?
The dependent variable.
Which variable is the 1 factor being investigated or altered in the experiment?
The independent variable.
Which variable is always drawn on the x axis of a graph (along the bottom)
The independent variable.
How do you calculate your percentage of a test score?
What you got, divided by the total marks (=) then times by 100.