Unit 1 - Lesson 2

Question 1

Atoms

Answer 1

Basic particles of all living things

Question 2

Elements

Answer 2

Types of atoms that occur naturally on Earth

Just 6 elements make up most of the human body
Oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorous

Question 3

Molecule

Compound

Answer 3

A group of atoms held together by chemical bonds

A substance made up of atoms of 2 or more elements joined by chemical bonds

Question 4

Lipids

Answer 4

A fat molecule or a molecule that has similar properties. Example oil, wax

Do not mix with water

One of their jobs is to store energy

Question 5

Protein

Answer 5

A molecule made up of smaller molecules or building blocks called amino acids.

Are used to build and repair body structures and to regulate processes. Example: meat and peanut butter

Include enzymes that help chemical processes happen

Question 6

Carbohydrates

Answer 6

Molecules that include sugars, starches and fiber. Examples: sugar, pasta 🍝, bread 🍞

Are used as a source of energy and for energy storage

Question 7

Nucleic Acids

Answer 7

Molecules that carry information in cells (DNA)

Made up of smaller molecules called nucleotides

Question 8

Phospholipid

Answer 8

A lipid that contains phosphorus

Form most of the cell membrane
The head is attracted to water. The tail repels water. They form a double layer in the cell membrane

Question 9

Why is water important to the cell?

Answer 9

Many cell processes require water

Water makes up nearly 2/3 of the mass of the cell

Question 10

Osmosis

Answer 10

The movement of water through a semipermeable membrane

Water moves from an area of high concentration to low concentration