Show:
ionic compounds!
acids and bases!
cells ( including specialized cells!)
how we see colour (including theory)
history of climate change!
100
What is an ionic compound?
an ionic compound is a chemical compound in which ions are held together in a lattice structure by ionic bonds. Usually, the positively charged portion consists of metal cations and the negatively charged portion is an anion or polyatomic ion, Ions in ionic compounds are held together by the electrostatic force between oppositely charged bodies, Ionic compounds have a high melting and boiling point, and they have a high hardness and are very brittle like lemons
100
True or false: bases are sometimes called alkalis?
true:)
100
what do all cells start there life as? A) stem cells B) blood cells C) Nurse cells D) Pigment cells
A) stem cells
100
what colours do we need to reflect to see the colour blue? A) green and black B) green and red C) orange and silver D) purple and yellow
b) green and red
100
true or fales: is climate changes effecting your health?
true!
200
do ionic compounds dissolve in water? (yes or no)
yes
200
the chemical name for vitamain C is _______ acid ?
vitamain C can oftem lead to disse called scurvy
200
what are the three types of stem cells?
- totipotent stem cells - pluripotent stem cells -adult stem cells
200
true or false: green and purple reflect to make red?
false!
200
what are some effect from climate chagne ?
- weather patterns -health -wildlife -glaciers and sea levels
300
Difference Between Ionic and Molecular Compound?
- Molecular compounds are pure substances formed when atoms are linked together by sharing of electrons while ionic compounds are formed due to the transfer of electrons. - Molecular compounds are made due to covalent bonding while ionic compounds are made due to ionic bonding. - Molecular compounds are formed between two non-metals while ionic compounds are formed between metals and non-metals. - Molecular compounds are poor electrical conductors while ionic compounds are good conductors. - Molecular compounds can be in any physical state ‘“ solid, liquid, or gas. Ionic compounds are always solid and crystalline in appearance. -There are a lot of molecular compounds than ionic
300
this acid is used in almost all car batteries and is know as oil or vitrial, which acid id it?
sulphuric
300
what are three main factors that influence differentiation?
- the contant of the eytoplasm -enyronmentant conditions -the inffueneof neighooring
300
how do are eyes see colour?
from the physics of light and optics. More light is reflected by bright colors, resulting in excessive stimulation of the eyes
300
What makes the climate change?
The Earth’s climate is influenced by many factors, mainly by the amount of energy coming from the sun, but also by factors such as the amount of greenhouse gases and aerosols in the atmosphere, and the properties of the Earth’s surface, which determine how much of this solar energy is retained or reflected back to space.
400
What are some properties of ionic compounds?-
ionic compounds are polar compounds. - they have high melting and boiling points. - they are veery much soluble in water and insoluble in non polar solvents like benzene, carbon tetra chloride etc.they can even act as conductors.
400
what does a buffer solution do?
solution that resists pH changes
400
What is a stem cell?
stem cells are the bodys ram materials
400
What is colour theory?
color theory is a body of practical guidance to color mixing and the visual impacts of specific color combinations.
400
What is the Difference Between Weather and Climate?
Weather is the day-to-day state of the atmosphere, and its short-term Climate is defined as statistical weather information that describes the variation of weather at a given place for a specified interval. In popular usage, it represents the synthesis of weather; more formally it is the weather of a locality averaged over some period