Science Demo

Question 1

what is Dynamic Equilibrium

Answer 1

Dynamic Equilibrium: When all organisms, nutrients, and resources are in balance with each other

Question 2

what is the earth

Answer 2

The Earth is what we call a closed system
Matter is trapped within the system, while energy can come from the outside (the Sun)

Question 3

what is matter cycles

Answer 3

Matter: has mass and takes up space
Matter cannot be created or destroyed
As organisms are born and die, they are recycle back into the environment with the help of decomposers

Question 4

what are Biogeochemical Cycles

Answer 4

Matter will flow through the main spheres
Biosphere
Atmosphere
Hydrosphere
Lithosphere
One of these cycles is called a biogeochemical cycle

Question 5

what is the water cycle

Answer 5

Water is essential for all living things
The water cycle is a series of events that cycle water throughout the environment
Water is continuously moving through different parts of an ecosystem

Question 6

How Water Moves from evaporation

Answer 6

Evaporation: heat from the sun causes water to change from liquid state to its gaseous state
● Water moves to the atmosphere

Question 7

How Water Moves from Transpiration

Answer 7

Transpiration: water released from tiny pores in plant leaves as water vapour
● Water moves to the atmosphere

Question 8

How water moves from condensation

Answer 8

Condensation: the water vapour in the atmosphere condenses to form water droplets (clouds)
● The water droplets in the cloud collect and accumulate into larger water droplets
● When the cloud gets big and heavy, they eventually fall back down towards the Earth as precipitation
● Precipitation can be in the form of rain, hail, or snow

Question 9

what is surface run off?

Answer 9

Surface run-off: Water traveling on top of the surface of the Earth to places where water is collected
○ Can be collected in oceans, lakes, ponds, streams, etc.

Question 10

what is precolation

Answer 10

Water filtering through the ground to underground aquifers

Question 11

what is The Carbon Cycle

Answer 11

Carbon moves between living(biotic)and Non-living (abiotic) parts of an ecosystem
Carbon is cycled through the lithosphere, atmosphere, hydrosphere, and biosphere

Question 12

Where can we find carbon?

Answer 12

Carbon is a part of all living things
Including in plant tissues
Carbohydrates, like glucose (C6H12O6)
In the atmosphere in the form of carbon dioxide (CO2) or methane (CH4)
In fossil fuels (coal, oil, and natural gas)
From decomposed organic matter

Question 13

how is carbon being cycled (what is the process)

Answer 13

The carbon dioxide in the atmosphere is converted into glucose (C6H12O6) in plants through photosynthesis
Through consumption, carbon is passed through the food chain
Plants and animals release carbon dioxide back into the atmosphere through the process of cellular respiration

Carbon enters the ground when plants and animals decompose (the process is called decomposition)
Organic carbon trapped in rocks for millions of years is pressurized and compressed forming fossil fuels
It is then released back into the atmosphere through combustion (burning) returning carbon back into the atmosphere as CO2

Question 14

how do Human Activities Change the Carbon Cycle

Answer 14

Burning fossil fuels → Releases stored carbon into the atmosphere
Deforestation → Increases the concentration of carbon dioxide in the atmosphere

Question 15

what is nitrogen

Answer 15

Nitrogen is an important element for biological organisms
It is a component of DNA and proteins which are essential for all life functions.
Nitrogen makes up about 78% of the atmosphere, but cannot be directly absorbed from the atmosphere for use by most organisms

Question 16

what does nitrogen move through?

Answer 16

N2 gas
Nitrite (NO2-)
Ammonium (NH4+)
Nitrate (NO3-)

Question 17

what is nirtogen fixation?

Answer 17

Nitrogen fixation: Bacteria in soil or roots can change nitrogen in the air (N2) into forms that plants can use (ammonia)
Lighting can also do this!

Question 18

what is nitrification

Answer 18

Soil bacteria converts the nitrogen compounds (ammonia) into nitrates which are essential for plant growth
Primary consumers (who eat the plants) begin the process of passing nitrates up trophic levels

Question 19

what is dentrifcation?

Answer 19

Many animals consume more nitrogen than they need
The excess nitrogen is expelled as waste (as urea and ammonia)
When an organism dies and begins to decompose, it releases the nitrogen in its body back into the soil
Excess nitrates are converted to N2 gas by soil bacteria, allowing it to re-enter the atmosphere

Question 20

what are the affects of nitrogen pollution

Answer 20

Artificial Fertilizers: Runoff from farms lead to contaminated water with excess nitrogen
●Extra nitrogen in water leads to overgrowth of algae
●The algae use up the oxygen in the water, suffocating all the other organisms
○This process is called eutrophication