Earth's Movements
Name two ways the Earth moves.
Rotation and orbit
What is the only thing we see?
light
How are particle arranged in a solid?
Tightly packed in a set pattern.
What is a hypothesis?
A guess about why something happens.
What is disolving?
A solid breaking into single particles in a liquid.
What does rotation mean.
Spinning
What is light?
A form of energy
What are the two types of vaporization?
Evaporation and boiling.
What is a variable?
Something that changes or is chaned.
What do we call something that will not dissolve?
Insoluble
What does the Earth's rotation cause?
The cycle of day and night.
What is the most important natural source of light?
The Sun
Where does water go when it evaporates?
Into the air.
What is the dependent variable in an experiment?
The thing that the scientist observes and records.
What happens to an insoluble solid when it is mixed with a liquid?
It sinks to the bottom or floats to the top.
What does the tilt of the Earth's axis cause?
The seasons
Why do we see things that don't make light?
They reflect light
How are evaporation and boiling different?
Evaporation happens at lower temperatures and only on the surface.
What is the independent variable in the experiment
The thing the scientist changes to see what it does to the dependent variable.
What happens to a dissolved solid when the liquid evaporates?
It is left behind.
Why is it colder at the poles?
The Sun's energy hits at a steep angle.
Why do we see things as having a colour?
They reflect that colour of light and absorb the others.
Give an example of condensation.
Various possibilities.
What were the independent variables in our experiment with drying cloth?
Temperature, moving air, and surface area
What happens to a liquid when we keep adding a soluble solid?
It becomes saturated.