The Chemistry Of Life: Chapter 2

Question 1

What is the difference between mass and weight?

Answer 1

Mass never changes and weight is how strong mass is being pulled by gravity

Question 2

List three examples of matter.

Answer 2

cells, organelles, metals, gasses, oils

Question 3

What are the states of matter?

Answer 3

solid, liquid, gas

Question 4

What is an Element?

Answer 4

Matter that cant be broken down to other substances by physical or chemical processes.

Question 5

how many natural occuring elements are there?

Answer 5

92 natural occuring elements

Question 6

What is known as the smallest unit of matter?

Answer 6

Atoms

Question 7

What particals soes the nucleus contain?

Answer 7

Protons(positive charged) and Neutrons (neutral)

Question 8

why does the oribital (eletron Cloud) always have a negative charge?

Question 9

List the 5 Kingdoms of life

Answer 9

Animals, Fungi, Monera, Protista, plants

Question 10

What are 4 characteristics of water that are important to life and explain?

Answer 10

• Water is cohesive and adhesive which is essential for water transport within plants,
  -Water has a high specific heat capacity which means it can take in a large amount of heat without a big tempature change. This helps regulate tempatures for enviornment and organisms.
• water is a solvent (universal solvent)which is essential for transporting nutrients and waste.
  -Ice floats. water is less dense as a solid which insulates water and protects marine life in cold tempatures