science spiral 3 study deck

Question 1

what is a physical change? and an example

Answer 1

definition: the change to the physical appearance of the substance that’s not the chemical composition.

example: crumbling paper

Question 2

what is a chemical change? and an example

Answer 2

definition: the characteristics observed during a reaction when the substance is changed.

example: Na + Cl = NaCl (sodium reacting with chlorine)

Question 3

how do you know whether it’s a chemical or physical change? (clues)

Answer 3

change of smell, color, when gas/heat is absorbed or released, precipitation, and irreusable change

Question 4

What is the difference between a reactant and a product?

Question 4

what is climate?

Answer 4

Definition: the condition of the atmosphere over 30 years

Question 5

what is the weather?

Answer 5

Definition: the current condition of the atmosphere

Question 6

what are the greenhouse gases?

Answer 6

water vapor (H2O), carbon dioxide (CO2), methane (CHu), nitrous oxide (N2O), surface level ozone (O4)