Differences
What supplies the potential difference in a circuit?
The cell / Battery
In physics, what is a force field?
a volume (space around an object) where a non-contact force has an effect/ can generate a force.
What is a correlation?
What is a causal link?
the direct cause-and-effect relationship between two events or variables. It means Event A scientifically or structurally brings about Event B, establishing that one action is responsible for the occurrence or outcome of another.
Why are models useful?
They make complex ideas easier to understand.
What does the potential difference across a component show?
Voltage
What are the 3 non-contact forces that produce fields?
Gravity, magnetism, and static electricity.
How do humans know that gravity exists in all directions.
The earth is a sphere. To someone else on planet earth their weight force is in a different direction than yours.
What causes air pressure?
Particles moving in all directions bouncing against each other.
Whats the difference between a solar and lunar eclipse.
Solar - Sun, moon, the earth.
Lunar - Sun, earth, moon
What is latent heat energy?
Energy required to break / create physical bonds (change states of matter)
What is the unit to measure gravitational field strength?
N/Kg
How do humans know that when a person jumps in the air the earth also moves?
Newtons 3rd law
Is the relationship between depth of water and water pressure directly proportional or inversely proportional?
Direct - As depth increases water pressure also increases.
Why is there no dark side of the moon?
All sided of the moon receive the same amount of light. It is tidally locked to earths surface.
Describe specific heat capacity.
Energy required to increase the temperature of 1 kilogram of a substance by one degree Celsius./ The amount of heat energy a substance can hold without changing temperature.
The strength of earths gravitational field isn't the same everywhere on earth's surface. Why not?
The earth isn't a perfect sphere. The closer you are to the center of the planet, the stronger the field strength.
When a person kicks a soccer ball, their foot exerts a force on the ball. What is the other force in this pair?
The ball exerts an equal but opposite force on the the person's foot.
What is the difference between a linear relationship and a exponential one?
Linear means if one variable doubles the other doubles or halves.
Exponential means if one variable doubles the other variable is more than doubled (direct) or less than halved (indirect)
Why are there so many different models for how atoms look?
They all focus on different ideas. To make it easier to understand.
Describe a convection current in as much detail as possible.
a heat-driven cycle of continuous fluid movement. It occurs when a fluid (such as a liquid or gas) is heated, becomes less dense, and rises. As it rises and cools, it becomes denser and sinks, creating a constant, circular flow.
Describe all 3 force-fields.
gravitational - volume around amass that attracts other masses.
Electric - volume around a charged particle that can either attract or repel other charges.
Magnetic - volume around a magnet that can either attract or repel other magnets or ferromagnetic materials (iron, cobalt, nickel, etc.)
If a mass is attached to the bottom of a spring suspended in the air, the spring stretches. How do you know there must be a force form the spring on the mass?
The mass has a weight force and is no longer moving. Newton's first law states, an object will have uniform motion if there is no net force acting on the object.
Weight force of mass = force from the spring
What happens to the boiling point of water as altitude increases? Why?
Boiling point reduces as altitude increases because there is less force squeezing the atoms together (pressure) so less internal energy is required to over come them and become a gas.
Whats the difference between opaque, transparent, and transluscent.
Opaque - All light is either absorbed or reflected.
Transparent - Most light is Passed through without scattering
Transluscent - Most light is passed through but scatters so no image can be seen.