Life Science
Where do food chains always start?
The Sun
What type of water do estuaries have?
Brackish Water
(salt + fresh)
Which element classification takes up the majority of the Periodic Table?
Metals
The process by which plants absorb water from the soil through their roots and release it as water vapor into the atmosphere
How do viruses reproduce?
Viruses release their DNA into the host cell, hijacking it and forcing it to duplicate viral material. When the new viruses are made, they exit the cell and go to others to keep on spreading.
What is the largest active reservoir of accessible freshwater available for human use?
Groundwater in Aquifers
What are electrons on the outermost shell of an atom called?
Valence Electrons
H2O3 + N2HO = H3O3 + ???
N2O
What is the difference between a PANDEMIC and an EPIDEMIC?
Epidemic: A disease that affects a large number of people within a certain community, region, or country.
Pandemic: An epidemic that has spread beyond into other countries and/or continents.
Biomass is a RENEWABLE energy source. However, there is still an environmental concern with using it. What is it?
When combusting biomass, it releases carbon dioxide into the atmosphere, a greenhouse gas.
How do you find out how many neutrons are in an atom?
Subtract the atomic number (number of protons/electrons) from the atomic mass.
(Atomic Number - Atomic Mass)
What's an index fossil?
A fossil of an organism that lived in a short, specific geologic time and is widespread.
How much energy is passed from organism to organism as it moves up in the energy pyramid?
10%
Acidic
Describe the following situations as CHEMICAL or PHYSICAL changes.
1) Firewood burning
2) Water condensing into clouds
3) A bike rusts
1: CHEMICAL
2: PHYSICAL
3: CHEMICAL
Our tailbone is a ___ structure, as it used to serve a function thousands of years ago but no longer does.
Vestigial
In an ecosystem, three colors of the same species of rabbits exist: brown, white, and gray. As winter approaches, hungry predators roam in search of rabbits in the snow. Which species has the BEST chance of surviving the predator? WHY?
White rabbits will survive, as they camouflage in the snow.
Which energy source involves splitting the nuclei of radioactive elements? Is it renewable or non-renewable?
Nuclear Fission, Non-Renewable.
(P.S.: Don't confuse renewability with cleanliness, nuclear is cleaner than fossil fuels, for example, but it is extracted from finite minerals!)
What is a heterogenous mixture?
A non-chemical combination of two or more substances which are not evenly distributed.
A tick is on the fur of the dog, sucking its blood for nutrients. The dog gets sick from the tick and loses some nutrients.
What kind of symbiotic relationship is this?
Who benefits?
Symbiotic Relationship: Parasitism
Benefits: Tick