Dynamic Earth
From outside to inside, name the 4 main layers of the Earth.
Crust, Mantle, Outer Core, Inner Core
Below 7
An involuntary response to a stimuli is called a what?
Reflex response
What is the difference between static electricity and an electric current?
An electric current has a flow of electrons whereas static electricity the electrons are stationary.
8 minutes
What waves are the first to be detected by a seismogram?
Primary (P) waves
An acid-base _____ is a substance that changes colour depending whether the substance is an acid or base.
Indicator
The body's ability to maintain equilibrium is known as what?
Homeostasis
State the Law of Reflection
The angle of incidence = the angle of reflection
What is the main gas that makes up the Earth's atmosphere?
Nitrogen (about 70%)
How many times more energy is released by an earthquake with magnitude 6 than an earthquake with magnitude 5?
10x
What is an endothermic reaction?
A reaction that absorbs heat from its surroundings (e.g. photosynthesis)
What are the 3 main segments of the brain?
Cerebrum, Cerebellum, Brainstem
The bending of light is called...?
Refraction
What is the only letter not to appear on the periodic table?
J
What are the names for the point where an earthquake originated in ground and on the surface.
In ground - Focus
On surface - Epicentre
Why does boiling lemon juice in a dull aluminium saucepan leave the saucepan shiny?
Lemon juice is an acid and will neutralise aluminium oxide to produce a soluble salt and water
A message being sent from the brain to a muscle travels along what neurons?
Motor neurons
Draw an electric circuit with 2 lightglobes set up in parallel
Parallel circuit
What does DNA stand for?
deoxyribonucleic acid
The Theory of Continental Drift
Explain combustion
When a substance reacts rapidly with oxygen and gives off heat.
Describe the role of the pancreas and how it contributes to homeostasis
The pancreas releases insulin which helps control blood sugar levels.
What is the name of the light-sensing cells in the retina?
Cones
A mycologist studies what?
Fungi (mushrooms)