1.Elements- An element is made up of only one atom. An element can't be broken down into a simpler form by chemical reactions. Each element has a 1 or 2 letter symbol given by scientists. p.69
2.mixture- a combination of substances in which the individual substances do not change or combine chemically but instead retain their own individual properties
Living things contain a mixture called a suspension. This is formed when a liquid or gas has another substance spread equally through it. Example: blood cells p. 71 a combination of substances in which the individual substances do not change or combine
chemically but instead retain their own individually properties; can be gases,solids,liquids,or any other
combination of theas3.organic compound- compounds that always contain hydrogen and carbon. There are 4 kinds of organic compounds. The 4 types of organic compounds are Carbohydrates, Lipids, Proteins and Nucleic Acids. p.72
4.enzyme-a type of protein that regulates nearly all chemical reactions in cells p.72
5.inorganic compound-compound such as H2O,that is made from elements other than carbon and whose atoms can usually be arranged in only one structure p.73
6. Matter- anything that has mass and takes up space
7.Proton= posotive charge
8.nuetron= no charge
9.electon= negative charge
A compound is made up of 2 or more elements in exact proportions.
2 types of compounds:
1. Molecular Compounds- form when different atoms share their outermost electrons p.70
2. Ionic Compounds- form when ions of opposite charges attract one another to form electrically neutral compounds p. 71
Organic Compounds-always contains carbon and hydrogen and usually are associated
with living things. Inorganic Compounds-made from elements other than carbon and hydrogen.
Six elements make up 99% of living matter: Sulfur, Phosphorus, Oxygen, Nitrogen, Carbon, and Hydrogen.
Organic Compounds important to humans-Water, Calcium Phosphate, and Hydrochloric Acids.
In your lungs oxygen diffuses into your red blood cels. p. 77
Energy- is the ability to cause change. ex. sunlight, electricity, heat, and chemical energy.
1. Elements- An element is made up of only one atom. An element can't be broken down into a simpler form by chemical reactions. Each element has a 1 or 2 letter symbol given by scientists. p.69
2. mixture- a combination of substances in which the individual substances do not change or combine chemically but instead retain their own individual properties
Living things contain a mixture called a suspension. This is formed when a liquid or gas has another substance spread equally through it. Example: blood cells p. 71
a combination of substances in which the individual substances do not change or combine
chemically but instead retain their own individually properties; can be gases,solids,liquids,or any other
combination of theas 3.organic compound- compounds that always contain hydrogen and carbon. There are 4 kinds of organic compounds. The 4 types of organic compounds are Carbohydrates, Lipids, Proteins and Nucleic Acids. p.72
4.enzyme-a type of protein that regulates nearly all chemical reactions in cells p.72
5.inorganic compound-compound such as H2O,that is made from elements other than carbon and whose atoms can usually be arranged in only one structure p.73
6. Matter- anything that has mass and takes up space
7.Proton= posotive charge
8.nuetron= no charge
9.electon= negative charge
A compound is made up of 2 or more elements in exact proportions.
2 types of compounds:
1. Molecular Compounds- form when different atoms share their outermost electrons p.702. Ionic Compounds- form when ions of opposite charges attract one another to form electrically neutral compounds p. 71
Organic Compounds-always contains carbon and hydrogen and usually are associated
with living things.
Inorganic Compounds-made from elements other than carbon and hydrogen.
Six elements make up 99% of living matter: Sulfur, Phosphorus, Oxygen, Nitrogen, Carbon, and Hydrogen.
Organic Compounds important to humans-Water, Calcium Phosphate, and Hydrochloric Acids.
In your lungs oxygen diffuses into your red blood cels. p. 77
Energy- is the ability to cause change. ex. sunlight, electricity, heat, and chemical energy.