Mix and Flow
Cells and Systems
Mechanical Systems
Light and Optics
Water in Our World
100
What are the three states of matter?
Solid, liquid and gas.
100
Name one major organ system in humans that we learned about this year.
The respiratory, digestive or circulatory system.
100
What is the part of a lever that pivots?
Fulcrum
100
What is the part of your eye that focuses light?
The lens
100
True or false: Ocean water is drinkable by humans.
False
200
Which state of matter is the fastest?
Gas
200
What are the main 2 purposes of the cell wall?
To strengthen the rest of the cell and to prevent leaks from a large influx of water.
200
What is stored energy that is about to do work?
Potential energy
200
What are the two types of specialized cells in your eye that allows you to see?
They are called rods and cones.
200
What does potable mean?
Freshwater that people can drink.
300
What is this state of matter:
Solid
300
What type of cell is this:
Plant cell
300
Machines can never reach full efficiency because of this force, what is it?
It is kinetic force/energy.
300
Fill in the blank: The angle of refraction is equal to the angle of ____.
Refraction
300
Out of all the water on Earth, what percentage of it is potable?
About 2 percent.
400
What is a fluid?
A substance that has no fixed shape, and can flow freely.
400
What pumps and oxygenates your blood?
The heart.
400
What's this pulley's mechanical advantage?
This pulley has a mechanical advantage of 6.
400
Why do your eyes have a blind spot and what is it used for.
Your blind spot, also called the optic disc is where there's a connection between the retina and optic nerve.
400
Name 2 places where freshwater can be found.
Some examples include glaciers, ice caps, groundwater, lakes, rivers or swamps.
500
What is the difference between mass and weight?
Mass is the amount of matter something has, whereas weight is the pull of gravity on that object.
500
Name 3 key differences between plant/animal cells.
1. Plant cells have one large vacuole, whereas animal cells have many smaller ones.
2. Plant cells have a cell wall, but animal cells don't.
3. Plant cells have chloroplasts.
500
When your mechanical advantage is more than 1, what happens to your force and distance?
You have to use less force, but it is over a larger distance.
500
What is the range of light wavelengths that is considered in the visible light spectrum?
The visible light spectrum starts at 380 nanometers and ends at 740 nanometers.
500
What are the 2 things that determine water quality?
Pollution (point and non-point source) and water quantity.