Compounds & Mixtures
A collection of the same type of atom is called a... what?
An element
Does salt dissolve in water?
Yes
At what temperature does water boil?
100 degrees C
Does distillation provide a liquid or a solid as the end product?
Liquid
What is the closest planet to the sun?
Mercury
How many hydrogen atoms are there in a water molecule?
2
When sugar dissolves in water, what is the solvent?
What do we call the change from gas to liquid?
Condensation
Can you remove pure water from sandy water by distillation?
Yes
Where in the body could you find the femur?
In the leg
Bonded
TRUE or FALSE: You can filter sand from water.
TRUE
When we boil salt water, why does the salt not evaporate?
It has a very high boiling point
Name an element with a higher boiling point than water.
Any metal (apart from mercury).
Which is bigger: a cell, an atom or a molecule?
A cell
Name the compound formed when sodium and chlorine bond together.
Sodium chloride
What two parts always make up a solution?
A solute and a solvent
Which of the following is NOT a solute: sugar, carbon dioxide, chalk.
Chalk
What is different about ink and water that allows us to separate them with distillation?
Boiling points
In astronomy, what is meant by a light year?
The distance light travels in a year.
Why is water not found on the periodic table?
Because it is not an element.
What do we call a solution in which no further solute will dissolve?
Saturated
What is the boiling point of ethanol?
80 degrees C
What do we call the water droplets that form on the window when it is cold outside and hot inside?
What is the only place on Earth in which every direction you face is north?
The South Pole