chapter 4 grouping and identifying organisms
A robot can move, respond to its surroundings using sensors, and use energy from a battery. Explain why the robot is not considered a living organism, even though it shows some characteristics of living things. Refer to at least four life processes in your answer.
The robot is not a living organism because:
It does not grow or develop naturally.
It does not reproduce or produce young.
It does not respire by breaking down food to release energy; it only uses stored electrical energy.
It does not excrete waste materials produced by chemical reactions.
A material that is dull, brittle and does not conduct electricity. Is it a non-metal or a metal?
Non-metal
What does vibrate mean?
Means to move back and forth very quickly
name a substance that react with water
Potassium
What is the full form of DNA and RNA
Deoxyribonucleic acid (DNA) and ribonucleic acid (RNA)
Give some examples of alloys in used daily life
Stainless steel, coins, jewellery, aeroplane, artificial joints
Sound can break _____
Glass
Magnesium+hydrochloric acid=______ and_____
Magnesium chloride, and hydrogen gas
What is the illness called that is caused by SARS-CoV-2
Covid 19
Why are coins not made of silver?
Silver is too soft and expensive. That’s why every day coins are made of alloys.
What is subduction (in plate boundaries)
One play plate me slide underneath another one. This is called subduction. The rocks in the earth crust melt as they move into the mantle. They become the part of the mantle.
Explain why the bodies of plugs and wires are made of plastic
The bodies of plugs and wires are made of plastic, so people can touch the plug and the wire coming from the plug is also coated in plastic to protect people from getting electric shocks
Can a Indian elephant reproduce with a African elephant
No Indian elephants cannot reproduce with African elephants
Substance that can cause serious problems to your health is called
Serious health hazard
Before a 100 million years how many continents were there on earth
7
What is the purpose of a switch in a circuit?
The purpose of a switch in a circuit is to control the flow of electric current.
It allows the circuit to be:
Closed (on): current flows and the device works
Open (off): current stops flowing and the device turns off
In short, a switch lets you turn electrical devices on and off safely and easily
In 1968-1969 which virus killed approximately 1 million people ?
H3N2(influenza virus)
What is boiling point of copper ?
2580 degree Celsius
Define geological change
Geological change is the process by which the Earth’s surface and rocks change over time due to natural forces.
Geological change can take millions of years (like mountain formation) or happen suddenly (like earthquakes or landslides).
What is the boiling point of gold?
2850 degrees Celsius