Ch4
Define RNA
RNA is made of little threads that contain a set coded instructions for making more viruses
State a fact about the metal mercury.
Mercury is the only metal that is liquid at room temprature
Sound can vary in both ________ and ________
Loudness and pitch
The 4 types of volcanoes are _____.
Active, inactive, dormant, extinct
What can Influenza H3N2 virus do?
They can invade cells of birds, hummans and other mammals.
What are the metals that are mixed with steel?
A mixture of Iron and carbon. Sometimes chromium and nickel are added
What is the speed of sound?
343 meters per second
Duralumin is about ______ times more stronger than pure aluminium.
5
What are the reasons indian elephants can't reproduce with african elephants?
It can happen in the zoo when the 2 animals are of different species and kept in the same enclosure together.
What do the copper coins contain?
Copper, zinc and tin
What is the speed of sound in water and what is the equation of distance?
1500 meters per second. Distance= speed×time
Metals are _______ and ________
Strong and tough
Tell any 3 living organisms characteristics and define them.
Excretion- living organisms get rid of waste materials such as carbon dioxide
Reproduction- Living organisms can produce young ones
Respiration- food is broken down inside cells to provide energy
What are safety rules you should follow when working with acid and alkalis.
- wear safety glasses
- take the top of the bottle and place it upside down on the work surface do that is doesn't get onto the surface or dirty into the acid
How much do the tectonic plates move each year?
4cm
What are examples of magnetic metals?
Iron,steel, nickel, cobalt are magnetic
Tell the exact process of when the virus invades the cell of living organisms.
When viruses are inside the cell,each virus bursts open. The virus forces the cell to copy the instructions on the RNA, and replicate. Then the new virus bursts out then the dying cell , ready to infect more cells
What is the the full form of PH and what is it's defination and colors of acid alkaline and neutral in a universal indicator.
Potential of hydrogen. Indicates how acidic or alkaline a substance is from the scale of 0-12. Red - yellow is acid, green is neutral and blue- purple is alkaline in a universal indicator.
The newest fold mountains are between ________ and ______ years old.
10 and 25 million years old
In which years did the influenza virus kill approximately 1 million people
1968-1969