CHAPTER 6
If the sound vibrates faster, it is deep or shrill?
Deep.
Is calcium hydroxide an acid or alkali?
Alkali
What are lipids and where are they found in an virus?
Lipids are fats and some viruses have optional envelope which is formed of lipids.
define and name the evidence supporting continental drift?
➢ Fossil Evidence: Similar fossils of plants and animals have been found on different continents.
➢ Rock Formations: Similar rock types and mountain ranges are found on continents that are now separated.
What is the term used for strong acids?
Corrosive
100 000 times.
What is refraction and compression?
Sound waves move through the air by pushing air particles together
(compressions) and then spreading them apart (rarefactions).
Describe the whole process of alloy formation?
Define and name the reasons of cross breeding between species?
- Availability of mates: If there are not enough mates available of their species.
- Environmental changes: In some cases, animals may adapt to new environments where different species are present.
who was the German scientist who suggested that once all the lands were a one large continent?
Alfred Wegener
Why are Alloys more stronger than pure metals?
When a force is appied, layers slide over one another easily in a pure metal. While in an alloy, a different sized atom doesn't let layers slide easily.
What is the scientific name of dogs and a female horse?
- dogs: Canis lupus familiaris
- female horse: Equus ferus caballus
What is the non-metal or metal which is the second most found in the earth's crust based on the approximate measurement?
Silicon, Si
What are the 3 colours of appearence of Brass?
- golden yellow
- reddish gold
- silver soft alloy
Influenza virus