Interactions in the Environment
Name the 3 roles of producers
1. produce oxygen 2. supply food 3. provide shelter
Define a combination structure and give one example
A structure made of more than one structure such as frame, shell, or solid. Ex. house
Explain the difference between Homogenous and Heterogenous mixtures.
Homogenous = same throughout
Heterogenous = can see different parts
Stored energy an object has when it is above the Earth's surface. Ex. diving into a pool
What is a biofuel?
fuels produced from biomass (living things) such as plants that are a reusable form of energy
1. oxygen 2. food 3. water 4. energy 5. habitat
List the 4 internal forces that affect a structure
1. compression 2. tension 3. shear 4. torsion
Change of state from a solid to a gas.
Sublimation
What is the thickest layer of the Earth's atmosphere?
Exosphere
Ruby, Amethyst, Emerald, and Sapphire are all what type of substance and what type of rock (if you had to define it)?
Minerals and metamorphic rock.
Explain the term bioinvasion using key words and one example
What is the role of symmetry in the design of a structure?
What three factors affect the rate of dissolving in a solution?
Define the 3 types of heat transfer
conduction - direct contact between objects
convection - transfer of thermal energy by moving particles
radiation - transfer of energy by invisible waves
What 3 aspects of design help prevent structure failure?
design for load, design for safety, and design for efficiency
A stable community of animals and large plants, it changes slowly over a long period of time. Ex. forest
climax community
Structures that are useful to many different users refer to...
Universal Design
Explain fractional distillation using the example of crude petroleum.
Used to separate different substances that make up crude petroleum oil based on differences in their boiling points.
What is an ocean current and what affect do they have on the Earth?
ocean current is a pattern of movement of the water in a large part of the ocean, they affect the climate of Earth's regions.
What is the difference between the point of application on a structure and the plane of application on a structure?
Point - the exact location where force meets structure
Plane - side of the structure affected by the force
primary succession is a new community where one did not exist before and secondary succession is a destroyed/disturbed community is replaced by a new one.
Describe the concept of planned obsolescence
When a manufacturer deliberately designs a product with a limited lifespan.
Explain why algal blooms occur and what happens to the ecosystem.
Algal blooms occur when runoff from pesticides and insecticides used on farms and waste from factories enters the water. Algae takes up all the sunlight and parts of it start to decompose, less oxygen in water less for fish and other vegetation then everything starts to die.
What is the greenhouse effect? What are the two types of greenhouse effect?
Some of the radiant energy from the Sun is trapped in the Earth's atmosphere by gasses, like glass in a greenhouse. Natural and Enhanced Greenhouse Effect.
Why is Canada especially sensitive to climate change?
We have a huge land mass, parts of it are arctic so melting means dispersal of populations. We have lots of coastal areas, rising water levels means lots of damage to communities. Erosion of coasts. Loss of species.