Chemical Reactions
What is a chemical reaction?
It is an irreversible reaction when substances combine to create a new substance.
What are the two types of waves?
Transverse and longitudinal waves.
Red, orange, yellow, green, blue, indigo and violet.
What is a balanced diet?
A balanced diet is when you have enough of each nutrient in your body. Not too much and not too less.
What are group 7 elements called?
The halogens.
What is thermal decomposition?
It is a reaction using heat to break down a compound into simpler compounds or elements.
What can sound NOT travel in?
A vacuum.
What is reflection?
It is when light bounces back from a smooth surface.
What enzymes break down proteins?
How many elements are in group 0?
6 elements.
Why is cutting a lemon NOT a chemical change?
It isn't a chemical change because a new substance was not created. The lemon is only in two halves.
What is pitch/frequency?
It is the amount of waves per second/how high or low a sound is.
What does the optic nerve do?
Which organs are apart of the digestive systems?
The liver, stomach, large intestine, small intestine and pancreas.
What are the trends in group 1 elements?
As the number of electron shells increase down group 1, the outer electron becomes easier to lose, and the reactivity of the elements increases. They're soft and easy to cut, getting even softer and denser as you move down the group.
How are rainbows formed?
They are formed when light from the sun is scattered by water droplets through the air through refraction. Once the refracted light enters a raindrop, it is reflected off the back and then refracted again as it exits and travels to our eyes.
What is the difference between starvation and malnourishment?
Malnourishment is when the body doesn't get the proper amount of nutrients it needs to function properly, but is still eating. Starvation is when a person is not consuming enough or no food.