- All the populations of the different species that interact in a specific area or ecosystem.
What is a Community?
200
- A curve that is generally referred to as an oval of the shape of an egg. - ex. the earth's rotation is elliptical
What is an ellipse? Give an example on what is elliptical.
200
(a) A pure substance is matter that contains only one kind of particle. A mixture is matter that contains more then one particle. (b) An element is a pure substance that cannot be broken down into simpler parts by chemical methods. A compound is a pure substance made of two or more different elements that are chemically combined.
What is the difference between: Choose one (a) A pure substance and a mixture (b) An element or compound
200
a) When resistors are in series the: - Current is constant - Voltage decreases - Total resistance is such that: R = R1 + R2 + R3.... b) When resistors are in parallel the: - Voltage is constant - Current splits into the resistors - Total resistance is such that: 1\R=1\R1+ 1\R2+ 1\R3...
What happens to resistors when: a) They are in a Series Circuit (3 points) b) They are in a Parallel Circuit (3 points)
300
- Acid Precipitation is unnaturally acidic due to gases in the atmosphere that react with water to form acids. - One way to reduce this is to stop using a lot of gas
What is Acid Precipitation? How can we reduce it?
300
- The breeding of rare of endangered wildlife in a controlled setting to increase the population size.
What is Captive breeding?
300
(a) Jupiter is the biggest with a radius of 71490km (b) Mars is the smallest with a radius 3396km
Of the 9 planets in our solar system which one is: (a) The biggest (b) The smallest
300
- A measure of the ability of a substance to dissolve in another substance.
What is Solubility?
400
A population is all the individuals of a species that occupy a particular geographic area at a certain time.
What is a population?
400
- The death of all the individuals of a species.
What is extinction?
400
- Comets, Asteroids, Meteoroids, Meteors and Meteorites
What other objects are in the solar system other then stars and planets? Name at least 2
400
- The Diamond
What is the hardest natural material in the world?
500
A niche is the role and function of an organism or species within an ecosystem.
What is a niche?
500
- When the death rate of a species is higher then the birth rate for a long period of time.
How does extinction occur?
500
- A form of energy that makes up nearly 3 quarters of the universe; has the effect of increasing the expansion of the universe.
What is dark energy?
500
- One of two or more forms of an element that have the same number of protons but a different number of neutrons.