Chemistry

Examples of matter:

• Light

• Air

• Table

• Energy

• Feelings

Define matter.

Chemistry is the study of matter and the changes it undergoes.

• True

• False

Define substance.

Increased level of UV radiation can:

• Cause cataracts and skin cancer in humans.

• nothing

• Increase vitamin D and immunity system

• All of the above except yellow

cells have some ability to repair themselves when exposed to low levels of UVB. However, some scientists believe that when UVB levels reach a certain point, the cells of living organisms will no longer be able to cope, and many organisms will die.

• True

• FALSE

Ozone is made up from:

• Carbon

• H2o just add water

• Oxygen

• Sun rays

What are the layers of earth?

Benefits of sunscreen are...

• Protection from harmful UV radiation

  Prevent sunburn and skin cancer

• I don't like sunscreen

• It made my skin clearer

• All of the above

How does Ozone form:

• Oxygen gas (o2) is subjected to UV radiation therefore it breaks down into one oxygen particle and attach itself to a o2 that hasn't been subjected to UV creating O3 (ozone)

• The sun forms it

• Photosynthesis

• It forms naturally and gets into the atmosphere creating o2 and then hits the sun and becomes o3