Cards in this guide (21)
A example of a chemical change
a example of chemical change is fireworks
What happens when an atom gains an electron
It becomes a negative ion.
Which small molecule makes up more than half of a humans body weight
Why is the chlorine ion attracted to a sodium ion
the Chlorine ion is attracted to the Sodium ion because chlorine
ion is negative and the sodium ion is positive. positive and
negative ions are always attracted. hence the two are
attracted.
What is the purpose of adding an indicator to an unknown solution
Indicators contain chemicals that will react with certain
substances. If that substance is present in your unknown solution,
a reaction will occur. If no reaction occurs, then that substance
is not present in your solution
When glucose and fructose join together what do they form
Which best describes the role of nitrogen in the human body
main ingredients in proteins
What elements are in the most common substance in the human body
Which best describes how an ionic bond forms
One atom pulls an electron from another atom.
Which molecule allows a blade of grass to stand up straight
Cellulose, lignin, hemi-cellulose and fibres are all molecules
in the structure of the plant cell wall that makes the plant (in
this case a blade of grass) stand up straight.
Polysaccharide
Why are proteins considered organic molecules
They contain many carbon atoms
Which would prevent a plant from growing
What determines how much energy a human can recieve from food
The composition of food, especially the amount of fats.
What are the reactants in this chemical reaction Sodium metal reacts with hydrochloric acid to produce salt and hydrogen gas
The reactants in this reaction are sodium (Na) and hydrochloric
acid (HCl).
What two molecules do green plants use to make their glucose
Carbon dioxide and water.
Living things are made up of very complicated molecules. Why is carbon important for forming these complicated molecules
it forms very strong bonds
There are five different types of nucleotide bases found in living things. Which is an accurate comparison of the bases found in birds as opposed to the bases found in flowers
birds have a different arrangement of the bases than flowers
There are six elements that make up most of the human body. Which of the following is not one of these six elements
Methane gas is burned to provide heat. The chemical reaction for this process is shown in the equation below. CH4 plus 2O2 CO2 plus 2H2O plus energy What are the products in this chemical reaction
which will form an ionic bond
A positive ion and a negative ion.
two oppositely charged ions
Which of the following is an organic molecule
Glucose
CH4 for bio sem 1
Sucrose
Fructose
CH4
{Apex Asnwers} C2H6
