Periodic Table
What do Alkali Metals produce when they react with water?
A metal hydroxide and hydrogen.
What is pollination?
The process by which pollen grains are transferred from the anther to the stigma.
What is light?
A form of energy.
What are galaxies formed of?
A band of milky
What do you get when a group 2 metal reacts with oxygen?
What metal doesn't react wit oxygen and water?
A metal oxide.
Beryllium.
Name 2 types of pollination.
- Self-pollination.
- Cross-pollination.
What is the difference between luminous and non-luminous bodies?
Luminous bodies are natural sources of light and non-luminous bodies are artificial sources of light.
Shapes of galaxies?
~Spiral
~Elliptical
~Irregular
What are salt formers referred to?
Halogens
What are the functions of the anther, stigma and Petals?
~Anther: Contains pollen.
~Stigma: Where pollination takes place.
~Petals: Attract insects.
What is reflection?
The bouncing back of light rays after they hit a medium.
What are the influences of stone age, iron age and bronze age?
-Making fire, Agriculture and taming of cattle.
Name 3 Halogens.
Posibilities:
- Chlorine
- Iodine
- Bromine
- Fluorine
What is fertilization?
Process by which pollen grains fuse with ovules, making a zygote.
The angle of incidence is equal to the angle of reflection.
What are the effects of sulphur dioxide in the earth's atmosphere?
Rain, acid rain, respiratory infections, and suffocation
What are group 8 metals referred to and what are their properties?
Noble gas(es)
- Fairly non-reactive.
- Low boiling points.
- No colour, odor or flavour.
- Nonflammable.
What is Seed dispersal?
The scattering of seeds away from the parent plant.
What is refraction?
The bending of light rays as they pass through a medium.
The accumulation of ............. .............. has brought significant change in the atmosphere.
Gaseous oxides.