N2O5 because it is a molecular compound.
Give an example of a polyatomic ion that is a cation.
ammonium (NH4+)
Give the general formula for a neutralization reaction.
acid + base --> salt + water
Name another element that will have the same number of electrons as a sodium ion.
neon
What gas will form from a reation between zinc metal and hydrochloric acid (HCl)?
Hydrogen gas
If you are holding a flashlight so the beam strkes a plane mirror at an incident angle of 50 degrees, what is the measurement of the angle between the reflected ray and the mirror surface?
40 degrees
What type of mirror produces a virtual image that is larger than the actual object?
concave (converging)
What do we call the production of light from high temperatures?
incandescence
Which type of mirror would be useful to see a wide view of a store for security purposes?
diverging mirror (convex)
Explain how to draw the four rays for a concave mirror.
1. A ray parallel to the principal axis will reflect through F.
2. A ray through F will reflect parallel to the principal axis.
3. A ray through C will reflect back on the same ray.
4. A ray that hits the vertex will reflect according to the law of reflection for a plane mirror.
What occurs to a cell during interphase?
It grows, replicates its DNA and performs its normal function.
At what point of the cell cycle does cell division occur?
mitosis
Which organelle is responsible for energy production in a cell?
mitochondria
State the cell theory.
1. All living things are made up of one or more cells and their products.
2. The cell is the simplest unit that can carry out all life processes.
3. All cells come from other cells; they do not come from non-living matter.
At which stage of mitosis do chromosomes line up at the middle of the cell?
metaphase
List the components of the Earth's climate system.
atmosphere, lithosphere, hydrosphere, living things (biosphere)
The Earth's climate system is ultimately powered by the _____?
sun
What happens to the sun's radiation as it hits Earth?
Some is reflected, some is absorbed and some is used by plants for photosynthesis.
Name the proxy record that provides us with the longest record of conditions in the atmosphere. Then list two other proxy records.
Ice cores provide the oldest record (800 000 years).
Other proxy records include tree rings, fossils, coral reefs, cave formations and ocean sediment.
What is the difference between the natural greenhouse effect and the anthroppogenic greenhouse effect?
Greenhouse effect – natural process whereby gases and cloud absorb infrared radiation emitted from Earth’s surface and radiate it, heating the atmosphere and Earth’s surface.
Anthropogenic greenhouse effect – the increase in the amount of lower-energy infrared radiation trapped by the atmosphere as a result of higher levels of greenhouse gases in the atmosphere due to human activities, which is leading to an increase in Earth’s average global temperature
What is the main cause of recent changes in Earth's climate?
human activities
What is the difference between the lateral and apical meristems?
- apical - undifferentiated cells located at the tips of roots and shoots
- allow plant to grow longer and develop specialized tissue
- also occur in buds at the tip of growing stems
- lateral - undifferentiated cells located under bark in woody plants
- allow plant to grow wider and develop specialized tissue in stem
The speed of light in sodium chloride is 1.96 x 10^8 m/s. What is the index of refraction for sodium chloride?
c = 3.00 x 108 m/s
v NaCl = 1.96 x 108 m/s
n = ?
n=c/v
=3.00 x 10^8 m/s
1.96 x 10^8 m/s
= 1.53
The index of refraction for sodium chloride is 1.53.
What is the total number of atoms in this formula? Mg3(PO4)2
13
What is a precipitate?
A solid formed from the reaction of two liquids.